Toshiba Satellite P755 Series, Maintenance Manual

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4 Replacement Procedures 4.1 General
Satellite A660/A665/A660D Maintenance Manual 4-8
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 Blue

Screws of a special length Black
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 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.)