Colors Of Screw Shanks; Symbols Of Screws On The Laptop Body; Symbol Examples - Toshiba NB250 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, eg - 2.5 mm).

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.)
NB250/NB255 Maintenance Manual
Downloaded from LpManual.com Manuals
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