Colors Of Screw Shanks; Symbols Of Screws On The Computer Body; Symbol Examples - Toshiba Qosmio F40 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 even-numbered length
Screws of an odd-numbered length
Screws of a special length
Screws of a special length are those of a length having decimal places, such as 2.5
mm and 2.6 mm.

Symbols of Screws on the Computer Body

For easy maintenance, the screw types are shown on the computer 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.)
Qosmio F40/F45 Maintenance Manual
Brown
White
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