Screw Notation - Toshiba Portege R500 Maintenance Manual

4.1 General
Grip Color
Some screws have a colored grip area to help you determine the length of the screw.
• Even numbered length screws: Brown
• Odd numbered length screws: White
• Special length screw: Blue
"Special length screw" means screws whose length is indicated in an integral number to the
first decimal places such as 2.5 mm, 2.6 mm and so on.

Screw Notation

To make maintenance of the computer easier, the types and lengths of the screws are
indicated on the computer body and PCB.
Format:
Screw type + Screw length (mm)
Screw type
B: Bind screw
F: Flat head screw
S: Super thin head screw
T: Tapping screw
U: Other screws (Unique screws: pan head, stud, etc.)
Example: B6 ... 6mm Bind screw
Screw color/material
B: Black/Nickel
C: Silver/Non-Hexavalent Chromate
U: Other screws (Unique screws: such as stud, etc.)
PORTÉGÉ R500 Maintenance Manual (960-634)
4 Replacement Procedures
Grip area
[CONFIDENTIAL] 4-7