Toshiba Satellite L650 Maintenance Manual page 142

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.)
Satellite/Satellite Pro/L650 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