Colors Of Screw Shanks; Symbols Of Screws On The Laptop Body; Symbol Examples - Toshiba M645-S4080 Maintenance Manual

4.1 General

Colors of Screw Shanks

For easy identification of the correct screws, the screw shanks are colored according to their
lengths, as follows:
Screws of an odd-numbered length
Screws of a special length
Screws of a special length are those of a length having decimal places (i.e. 16mm).

Symbols of Screws on the Laptop Body

For easy maintenance, the screw types are shown on the laptop body as symbols. A symbol
consists of a letter representing the screw type and a numeral representing the screw length.
Screw type
Bind screw
Flat-head screw
Super flat-head screw
Tapping screw
Other screws

Symbol examples

6 mm bind screw
12 mm bind screw
5 mm stud
(The numeral represents the rounded length of the threaded portion regardless of the
entire stud length.)
Satellite M600/M640/M645/M647 Maintenance Manual
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Blue
Black
Letter
B (stands for bind)
F (stands for flat-head)
S (stands for super flat-head)
T (stands for tapping)
U (stands for unique-pan head screws, studs, etc.)
B6
B12
U5
4 Replacement Procedures
4-7