ELECRAFT K3 Assembly Manual
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ELECRAFT K3 Assembly Manual

High-performance 160 – 6 meter transceiver
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Download this manual See also: Owner's Manual, Instruction and Installation Manual
E
K3
LECRAFT
H
-P
160 – 6 M
IGH
ERFORMANCE
ETER
T
RANSCEIVER
K3 K
A
M
IT
SSEMBLY
ANUAL
Rev L8, January 18, 2013
Copyright © 2013, Elecraft, Inc.
All Rights Reserved

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  • Page 1  LECRAFT 160 – 6 M ERFORMANCE ETER RANSCEIVER K3 K SSEMBLY ANUAL Rev L8, January 18, 2013 Copyright © 2013, Elecraft, Inc. All Rights Reserved...

  • Page 2: Table Of Contents

    Initial Power On Check ........46  KREF3 Reference Oscillator ........46  KREF3 Description ..........46  KREF3 Installation Procedure ......46  KSYN3 Synthesizer ..........49  KSYN3 Description ..........49  KSYN3 Installation Procedure ......49  Elecraft manuals with color images may be downloaded from www.elecraft.com.

  • Page 3: Introduction

    Repair / Alignment Service (We want to make sure everyone succeeds!) If necessary, you may return your Elecraft product to us for repair or alignment. (Note: We offer unlimited email and phone support to get your kit running, so please try that route first as we can usually help you find the problem quickly.)
  • Page 4 Elecraft products transferred by the purchaser to a third party, either by sale, gift or other method, who is not disclosed to Elecraft at the time of original order, are not covered by this warranty. If the Elecraft product is being bought indirectly for a third party, the third party's name and address must be provided to Elecraft at time of order to insure warranty coverage.

  • Page 5: Preventing Electrostatic Discharge Damage

    How ESD Damage Occurs Whenever an object containing a static charge touches a circuit in your K3, current will rush into the circuit until the components reach the same voltage as the source of the static charge. If the voltage or current that passes through a component in your K3 during that brief period exceeds its normal operating specifications, it may be damaged or destroyed.

  • Page 6: Preparing For Assembly

     If you choose to use a soldering iron to work on your K3 for any reason, be sure the iron is ESD-safe with a grounded tip tied to the same common ground used by your mat or wrist strap.
  • Page 7 Figure 1. Typical Assembled K3/10 (Less Top Cover and Chassis Stiffener Bar).

  • Page 8: Tools And Test Equipment Required

    9. Power supply 13.8 VDC nominal (11-15 V) with a cable and Anderson PowerPole cable kit is provided with your K3 if you do not have a suitable cable with the required Anderson PowerPole connector. The power supply must be capable of providing at least 3 Amperes for a K3/10 and 20 Amperes for a K3/100.

  • Page 9: Unpacking And Inventory

    Some screws are very similar in length, but must be used in the correct locations described in the procedure to avoid damaging your K3. A paper clip or piece of tape will hold the envelopes closed after you check their contents.

  • Page 10: Standoffs

    Lock Washers Two types of lock washers are used in the K3 (see Figure 4). It is important that you use only the type specified and put the washers exactly where indicated. Failing to use the correct type may result in short circuits to nearby circuit traces.

  • Page 11: Assembly

    Assembly IMPORTANT ASSEMBLY INFORMATION 1. Screws and other Fasteners: A variety of screws and fasteners are used to assemble your K3:  Stainless Steel Hardware Kit: If you purchased the optional hardware kit that provides stainless steel hardware for the external fasteners, the letters (SS) are included in the procedure wherever you should use the stainless steel parts instead of the parts supplied with this kit.

  • Page 12: Rf Board And Chassis

    RF Board Description The RF PCB (Printed Circuit Board) is the heart of the K3 transceiver, both physically and electrically. During assembly, it serves as an attachment point for other PCBs as well as chassis panels, acting as the glue that holds things together.
  • Page 13 Install the two KBPF3 standoffs shown in Figure 8. Even if you didn’t purchase the KBPF3 general coverage option, the standoffs and hardware are included in the K3 kit to make installing the option easier at some future date. Note that these standoffs have only one lock washer between each standoff and the RF board Note that one standoff is very close to the toroid coils.
  • Page 14 Locate the crystal I.F. filters. Two types of filters are available: standard 5-pole filters and optional 8-pole filters (see Figure 10). One standard 5-pole 2.7 kHz filter is supplied. If you have elected to equip your K3 with the optional 8-pole 2.8 kHz filter, it has been supplied instead of the 2.7 kHz filter. If you have purchased additional filters, they may be installed now as well.
  • Page 15 Use pencil in case you change your filters later. This will keep the filter information with your K3. The label also has a row for Gain. This is a value you can determine later after your K3 is assembled and aligned.
  • Page 16 Figure 11. RF Board Partially Assembled.
  • Page 17 Check all three LPA connectors shown in Figure 12 to ensure they are fully mated as shown. If they are not fully mated, the transistors will not rest against the K3 bottom cover as required when it is fitted later.
  • Page 18 Figure 13. Installing Front Panel Shield. Mount the K3 mixer board on the RF board as shown in Figure 14. The mixer plugs into Z1 on the RF board. Figure 14. Installing Mixer Board.
  • Page 19 Figure 16. The right side panel has six additional holes; four for mounting the side feet and two for attaching other parts inside the K3 (see Figure 21). Set the right side panel aside for now.

  • Page 20: Kant3 Or Kat3, Right Side And Rear Panels

    KANT3 or KAT3 Description The basic K3/10 includes a KANT3 antenna input module. If you’ve ordered a KAT3 antenna tuner, the KANT3 is not required and will not be supplied with the kit. In either case, the module plugs into the RF board at the back-right corner.
  • Page 21 If you have the KRX3 Subreceiver option kit on hand, you may wish to install the AUX RF antenna connector at this time. The AUX RF connector is one optional way to connect an antenna to the subreceiver. Before you decide, turn to your KRX3 Installation and Operation Manual and review the Auxiliary KRX3 Antenna Input (Optional) section.
  • Page 22 Later you will apply power to do preliminary testing and calibration before the KRX3 Subreceiver is installed. Failure to insulate the TMP connector as described above may result in short circuits and extensive damage to your K3 if it touches a component, solder pad or other exposed circuit points.

  • Page 23: Preparing Right Side Panel For Installation

    Figure 21. Installing Side Panel Feet. Position the right side panel against the K3 to verify how it will fit against the RF board. When it is oriented correctly, the three holes along the bottom edge will line up with the holes in the 2D fasteners on the RF board and two holes in the side panel will be aligned with the tabs on voltage regulators U12 and U13.

  • Page 24: Mounting The Kant3 Or Kat3, Side And Rear Panels

    At the upper rear corner of the side panel you just identified in the previous step, mount a 2D fastener as shown in Figure 22, using a black 4-40 1/2” (13 mm) flat head screw (SS). Remember that flat head screws are measured from the flat top to the end of the threads.
  • Page 25 Attach the bottom lip of the rear panel to the 2D fasteners at the rear corners of the RF board with 4-40, 3/16” (4.8 mm) black pan head screws (SS). (Note that all the screws used on the bottom of the K3 are black...
  • Page 26 Connect the wires from the SO239 connector(s) to the KANT3 or KAT3 board as shown in Figure 28. Use needle-nose pliers to grip the terminals on the wire ends and carefully insert the connectors straight into the holes in the board. They may be very difficult to insert unless they are perfectly aligned. While inserting the plugs, support the board with your fingers to avoid putting stress on the connector at the bottom.

  • Page 27: Kio3 Interface

    If you have purchased the KXV3 option with your kit, go to the Installation Procedure in the KXV3 manual and install the option now, following the instructions in the Special Note to K3 Kit Builders. Otherwise mount the small blank panel in the space directly above PADDLE, KEY, PTT and KEY OUT connectors on the rear panel as shown in Figure 31.
  • Page 28 Figure 32. Preparing the KIO3 Board for Installation. Install the KIO3 Main board with the Audio I/O daughter board attached into the K3 as shown in Figure 33. The KIO3A main board plugs into J76 on the RF board. If the KXV3 is installed, the coaxial TMP cable fits between the KXV3 and KIO3 boards.
  • Page 29 The DB9 multi-pin connector on the KIO3 Digital I/O daughter board may have jackscrew nuts installed on the connector. (Jackscrew nuts are shown in Figure 35). If so, remove them. They will be reinstalled shortly. Install the KIO3 Digital I/O daughter board as shown in Figure 34. Be careful to support the KIO3 main board as shown while pressing the daughter board in place.

  • Page 30: Front Panel And Dsp

    Front Panel and DSP Front Panel and DSP Description The Front Panel is a large plug-in module that provides the K3’s user interface (LCD, switches, shaft encoders, potentiometers, and LEDs) as well as the microcontroller (MCU) and parameter storage (EEPROM and FLASH).
  • Page 31 On the front side of the board, mount four standoffs as shown in Figure 37. IMPORTANT! 1. Place the split lock washers between the standoff and board as shown in the figure. This is important to establish the correct spacing between the board and the front panel.
  • Page 32 Install the two soft foam light blockers at the ends of the LCD display as shown in Figure 38. Remove the paper strip covering the adhesive on each blocker and stick that side against the board (or the lip at the base of the switch buttons) so it stands up between the switches and the LCD.
  • Page 33 Ensure the flange on the MIC connector is not caught behind the panel. The flange should be slightly above the panel as shown all the way around its circumference as shown in Figure 40. It may be a snug fit requiring you to press it into place, pushing on the back of the connector.
  • Page 34 Cut only the five pins shown close to the back of the pc board so they do not extend above the solder pads. Cutting them avoids the possibility of a short circuit to an adjacent pc board when the K3 is assembled.
  • Page 35 CAUTION! In the following steps you will attach the plastic LCD cover and VFO A trim panels to the front cover using small screws. Use the screws specified in each step. Do not over-tighten these screws. Tighten the screws only to the point where you feel some resistance. It is very easy to strip the threads, especially the screws holding the LCD cover.
  • Page 36 Mount the cover on the front panel over the LCD as shown in Figure 46 oriented so the beveled edges are away from the panel. If the cover seems to bind against the VFO A trim panel, rotate it so the long edge striking the trim panel is at the top and, if necessary, work the screws through the holes in the plastic cover some more to loosen the fit.
  • Page 37 CAUTION! You may damage the encoders while installing the knobs in the next step unless you align the flats in the knobs with the flats on the shafts as described below. Press small knobs on the four controls under the left end of the LCD: SHIFT/LOW, HI/WIDTH, SPEED/MIC and CMP/PWR.

  • Page 38: Mounting The Subreceiver Auxiliary Dsp Board

    If you did not purchase the KRX3, go to Installing the KDVR3 Digital Voice Recorder Option on page 38 if you purchased the KDVR3 Digital Voice Recorder Option with your K3. If you do not have the KDVR3, go directly to Mounting the DSP Board Assembly on the Front Panel on page 39.
  • Page 39 Mount the three 7/16” (11mm) male/female standoffs on the component side of the main DSP board as shown in Figure 52 using 4-40 nuts and #4 split lock washers. Be sure that: The standoffs are on the component side of the board as shown. No lock washer is used between the standoff and the board.

  • Page 40: Installing The Kdvr3 Digital Voice Recorder Option

    Locate resistor R3 on the front panel board (mounted on the front panel). If R3 is positioned above the board on its leads as shown in Figure 54, push it over to one side of the outline as shown. Be sure you don’t push it so far its leads might touch the solder pads for other components on the board.

  • Page 41: Mounting The Dsp Board Assembly On The Front Panel

    Mounting the DSP Board Assembly on the Front Panel Locate the main DSP board and install the nylon standoff near J51 as shown below. Be sure you place it in the correct hole near the edge of the board. The standoff is also shown in Figure 55. CAUTION: To avoid damaging a circuit trace very close to the metal ring around the screw hole, position the lock washer under the screw so the split faces away from the trace.
  • Page 42 Squeeze the boards together while ensuring the pins are mating with the connectors until the DSP board is resting against the three standoffs on the back of the front panel board that you installed earlier. The two connectors will not mate completely. About 1/4” (6.4mm) of the pins may be visible when the DSP board is positioned against the standoffs.

  • Page 43: Mounting The Front Panel Assembly

    Screw the knurled nut onto the threaded shaft of the PHONES jack where it exits the front panel (see Figure 59). Screw it only finger tight. Do not use pliers. Figure 59. Phones Jack Hardware. Mounting the Front Panel Assembly Remove both side panels from the chassis as follows.
  • Page 44 ESD SENSITIVE: Wear a grounded wrist strap or touch an unpainted metal ground before handling the RF Board in the following steps. Turn the chassis upside down and position the front panel so the pins of P30 and P35 on the bottom of the RF board just begin to engage the connectors on the lower edge of the front panel assembly.
  • Page 45 REMOVING THE FRONT PANEL: If you need to remove the front panel assembly, remove the five screws holding it to the chassis (three on the top lip and two on the bottom), turn the unit upside down and use a screwdriver in the two pry slots provided as shown in Figure 63.

  • Page 46: Resistance Checks

    (SS). Resistance Checks The following resistance checks confirm that the main power busses in the K3 aren’t shorted to ground. If any of the values measured are lower than specified, inspect the unit carefully for loose hardware that is caught between components on the boards or for improperly mated connectors.
  • Page 47 Use your DMM to measure the resistance between the terminal on U12 and ground shown in Figure 66 . The resistance must be greater than 500 ohms (although in some K3’s it may be only slightly greater than 500 ohms).

  • Page 48: Initial Power On Check

    Connect your 13.8 VDC power supply to the 12VDC IN connector on the rear panel. If you do not have a suitable cable handy, assemble the Power Supply Cable Kit supplied with your K3. Do not connect a key, microphone or other accessories to the K3 at this time.
  • Page 49 Mount the TCXO module on the KREF3 board as shown in Figure 68. Be certain the leads go into the corner holes in the socket and the black dot is oriented toward connector J6 as shown. If you have a 1ppm high-stability module, the dot may be light brown and not as close to the corner.
  • Page 50 CAUTION In the following step it is easy to drop screws and lock washers into the K3. If this happens, you must find and retrieve the hardware. Failing to do so may cause short circuits and damage your K3 when power is applied.

  • Page 51: Ksyn3 Synthesizer

    DDS (direct digital synthesis) reference. This in turn drives a VCO with a high C/L ratio, resulting in very low phase noise. See Theory of Operation, KSYN3, in the K3 Owner’s Manual for more information. The KSYN3 is supplied with a stiff metal plate covering the front of the pc board. This plate keeps the board from vibrating, especially if the K3 is operated with its internal speaker at high volumes.
  • Page 52 CAUTION In the following step it is easy to drop screws and lock washers into the K3. If this happens, you must find and retrieve the hardware. Failing to do so may cause short circuits and damage your K3 when power is applied.
  • Page 53 Locate the three TMP cables. They are about 1/8” (3 mm) diameter coaxial cables with connectors at each end as shown in Figure 74. Check each cable and trim any excess center conductor strands extending beyond the end of the pin as shown. This will make mating the connectors much easier. Figure 74.

  • Page 54: Loudspeaker

    Figure 77. Normally, the stiffener will remain attached to the K3 when you remove the top cover. If you install the KPA3 100-watt amplifier, the stiffener will be attached to the KPA3 shield and cannot be removed with the cover (see Figure 81 on page 55).
  • Page 55 Mount the speaker using the hardware shown in Figure 77. A suggested procedure for doing this is as follows: Find a book or other flat-smooth surface that is about the size of the top cover. From the top, place the screws in the four holes at the corners of the speaker grill area. Cover the screw heads with the book and, holding it in place against the top cover, invert the cover and lay it with the book on your work table so the bottom side is facing upwards.

  • Page 56: Kpa3 Shield

    KPA3 Shield Description The KPA 3 Shield is part of the optional KPA3 100-watt amplifier module. It isolates the high-level RF circuits in the KPA3 from the rest of the K3 and provides mechanical support for the amplifier module itself. KPA3...
  • Page 57 Attach the shield to the RF board and to the rear panel as shown in Figure 80. The screws, washers and nut are in the KPA3 Option kit. The standoffs are part of the K3 kit hardware. Figure 80. Attaching the KPA3 Shield.

  • Page 58: Bottom Cover

    Bottom Cover Bottom Cover Description The bottom cover is divided into two parts, the rear and forward sections. The rear section is slightly thicker than the forward section to act more efficiently as a heat sink for the LPA transistors. The bottom covers attach to standoffs as well as the 2D fasteners on the bottom of the RF Board.
  • Page 59 Identify the bottom cover forward section by test fitting it on the bottom of the K3. The forward section is the thinner panel with a notch along one edge (see Figure 83). One side of the cover is fully painted. That is the outside. The other side has areas of bare metal left to ensure good electrical contact with the other cabinet parts.

  • Page 60: Knb3 Noise Blanker

    KNB3 Noise Blanker Description The KNB3 is one of two noise blanker systems in the K3. It is a narrow I.F. pulse blanker that plugs into the RF board. See Theory of Operation, Noise Blanker in the K3 Owner’s Manual for more information KNB3 Installation Procedure Install the standoff for the noise blanker as shown in Figure 85.

  • Page 61: Battery Bt1

    BT1 is a 3-volt lithium coin cell that provides the operating voltage for the real-time-clock IC (RTC) on the front panel when the K3 is turned off. Depending on the type of cell, BT1 could last from 2 to 10 years, thanks to the extremely low current drain of the RTC –...

  • Page 62: Kbpf3 General Coverage Receive Option

    KBPF3 General Coverage Receive Option If you have the KBPF3 General Coverage Receive option kit, install the board as follows. Otherwise skip this section and go directly to Power Amplifier Jumper Block on page 61. KBPF3 Description The KBPF3 extends the receive coverage outside of the Ham bands over the range of 500 KHz to 30 MHz and from 48 MHz through 54 MHz.

  • Page 63: Power Amplifier Jumper Block

    If the KPA3 shield is installed it will be inside the shield. Check the cable carefully to ensure you have fully insulated the metal conductor at the end. Failure to do so may result is severe damage to your K3 if it comes in contact with a live circuit.

  • Page 64: Bottom Covers

    Bottom Covers Turn the K3 over so the bottom is exposed. Position the forward section of the bottom cover with the feet and bail toward the front as shown in Figure 90. Attach the cover with seven 3/16” (4.8 mm) black pan head screws (SS) at the positions shown.
  • Page 65 Install the rear bottom cover section as follows (see Figure 92): Position the cover so the holes near the center line up with the transistors on the LPA board. The remaining holes will line up with 2D fasteners and standoffs. Note: The bottom cover is anodized, not painted.

  • Page 66: Top Cover

    Figure 93. Connecting Speaker to KIO3 Board. Place the top cover on the K3 with the tab at the rear extending under the lip of the rear panel. Secure the top cover with six 4-40 3/16” (4.8 mm) black flat head screws (SS) along the front and rear edges of the cover.
  • Page 67 This completes the assembly of your K3/10 Transceiver. Next perform the Initial Test and Calibration procedures below to ensure your K3 is operating properly. Once they have been completed you can proceed to install other options, including the KPA3 100-watt amplifier module, at any time. Each option is supplied with its own installation manual.

  • Page 68: Test And Calibration

    It’s time to apply power! In the following tests and procedures you will check out and calibrate essential functions of your basic K3. You must complete these procedures before operating your K3 at low power or before installing a KPA3 100-watt power amplifier option.

  • Page 69: Filter Setup

    If you have a Windows, Linux or Macintosh computer with an RS232 interface and cable, and an internet connection, perform the automated TX Gain calibration using the K3 Utility program as follows: Install the Elecraft K3 Utility Ver. 1.1.12.29 or later on your computer. The utility is available for downloading from the Elecraft web site: www.elecraft.com...

  • Page 70: Krx3 Subreceiver Installation

    The wattmeter is reasonably accurate as it is supplied. However, if you have an accurate external wattmeter you can adjust the K3 to match its readings at low power (5 watts), high power (50 watts), and, if you have the KXV3 module installed, at 0.5 milliwatts output at the KXV3 transverter interface.

  • Page 71: Appendix A Illustrated Parts List

    Each board was tested and aligned for optimum performance at the factory. Any change to these adjustments will degrade the performance of your K3 or prevent its operation altogether. All user calibrations and adjustments are done in firmware using the front panel menus. These are described at the appropriate points in the assembly procedures and in the Owner’s Manual.
  • Page 72 ELECRAFT ILLUSTRATION DESCRIPTION PART NO. RF Board E850261 ESD Sensitive PA Jumper Block Assembly (pre-installed on E850322 RF board) Low Power Amplifier (LPA) Board E850256 ESD Sensitive. K3 Mixer Board E850257 ESD Sensitive. A- 2...
  • Page 73 KANT3 Antenna Input Module Notes: 1)This board is not supplied if you purchased the KAT3 automatic antenna tuner option with your K3 E850248 kit. 2) Due to design changes, L3 may not be present. (You may see clipped leads where it was removed.
  • Page 74 ELECRAFT ILLUSTRATION DESCRIPTION PART NO. KSYN3 Board E850402 ESD Sensitive KIO3 Main Board E850237 ESD Sensitive. KIO3 Audio I/O Module E850236 ESD Sensitive. A- 4...
  • Page 75 E100214SS Panel, Blank (KPA3 Fans) Notes: This part is not supplied E850297 if you purchased the KPA 100 watt amplifier option with your K3 kit. Panel, Blank (KXV3 I/O) Note: E850296 This part is not supplied if you purchased the KXV3 I/O option with your K3 kit.
  • Page 76 ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Front Panel Shield E100216 Chassis Stiffener E100222 KIO3 Panel E850315 Loudspeaker with attached E850300 wire and connector Loudspeaker Shield E980087 E850312 (Part of E850262 Enclosure) ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Left Side Panel E100210 Right Side Panel...
  • Page 77 E850239 K3 FP Encoder Assembly Bag ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Encoder Assembly E850239 E850249 I.F. Crystal Filter Bag (or Box) NOTE: If the optional 8-pole 2.8K filter is purchased instead (see next item) this filter is not supplied. ELECRAFT...
  • Page 78 Rectangular Insulator the size of the TCXO TCXO spacer (supplied only with E980146 optional KTCXO3-1 module) Tie Wrap, KREF3 TCXO. Module E980145 E850307 K3 Front Panel Bezels and Serial Number Label ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Bezel (LCD cover), K3...
  • Page 79 E850229 SO239 Ant Connector Assembly Bag (Note: If you purchased the KAT3 Automatic Antenna Tuner, your kit will include two of these bags.) ELECRAFT ILLUSTRATION DESCRIPTION PART NO. SO239 (UHF) Female Panel Mount E850229 Connector with cable Screw, 4-40, 1/4” (6.4 mm) Black, Pan...
  • Page 80 E850263 K3 Miscellaneous Bag ELECRAFT ILLUSTRATION DESCRIPTION PART NO. TMP Cables E100282 Battery BT1 (CR2032) E850058 Loudspeaker Grill Cloth E850089 #4 Fiber Washer E700031 Bottom Feet with tilt stand E980098 Front Feet with Stand Rear Feet SO239 Hole Cover E980135...
  • Page 81 ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Screw, 4-40, 3/16” (4.8 mm) Black, Flat E700025 Head Screw, 4-40, 3/8” (9.5 mm) Black, Flat E700131 Head Screw, 4-40, 1/2” (13 mm) Black, Flat E700132 Head Screw, 6-32, 1/4” (6.4 mm) Black Flat E700186 Head Screw, 4-40, 3/16”...
  • Page 82 E850241 Front Panel Hardware Bag ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Felt Washer E700033 Knurled Nut (Phones Jack) E700138 Standoff, 2/56, 5/16” (7.9 mm) long E700122 Typical Standoffs Standoff, 4-40, 5/16” (7.9 mm) long E700121 Standoff, 4-40, 5/8” (15.9 mm) long E700003 Standoff, Nylon, 5/8”...
  • Page 83 Knob, VFO B Tuning E980090 Knob, RIT/XIT E980089 Knob, Concentric Shaft, Large E980092 Knob, Concentric Shaft, Small E980091 E850306 K3 Knob and Band for VFO A ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Knob, VFO A Tuning E980093 Finger Grip, Main VFO Tuning Knob...
  • Page 84 E850316 Carrying Handle Bag ELECRAFT ILLUSTRATION DESCRIPTION PART NO. Handle (strap, spring insert and two end E850317 caps) Screw, 6-32, 1/2” (13 mm), Black, Pan E700042 Head (in envelope) Lock Washer, #6, Split (in envelope) E700041 Nut, 6-32 (in envelope)

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