Toshiba TOSHIBA NB100 manual Colors of Screw Shanks, Symbols of Screws on the Computer Body

4.1 General 4 Replacement Procedures

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	Brown
‰ Screws of an odd-numbered length	White
‰ Screws of a special length	Black

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	Letter
‰ Bind screw	B	(stands for bind)
‰ Flat-head screw	F	(stands for flat-head)
‰ Super flat-head screw	S	(stands for super flat-head)
‰ Tapping screw	T	(stands for tapping)
‰ Other screws	U	(stands for unique-pan head screws, studs, etc.)
Symbol examples
‰ 6 mm bind screw	B6
‰ 12 mm bind screw	B12
‰ 5 mm stud	U5

(The numeral represents the rounded length of the threaded portion regardless of the entire stud length.)

TOSHIBA NB100 Maintenance Manual 4-7