Toshiba Satellite M500, Руководство по обслуживанию

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4 Replacement Procedures
SatelliteM500/M500D Maintenance Manual [CONFIDENTIAL] 4-13
Color of Screw Shaft
To avoid mistakes on the screw length, screw shafts are colored as follows:

Even number length screw: brown

Odd number length screw: white

Special length screw: blue (Screws whose lengths are indicated to
one or more decimal places such as 2.5 mm or 2.8 mm.)
Marking of Screws on the Computer Body
To make maintenance of the computer easier, markings of the kinds of the screws
including the types and lengths of the screws are indicated on the computer body.
Kind of screws Symbol

BIND screw B

FLAT HEAD screw F

SUPER THIN HEAD screw S

TAPPING screw T

Other screws U
(Unique screws, STUD, etc.)
Examples:

6 mm BIND screw B6

12 mm BIND screw B12

4 mm FLAT HEAD screw F4
(Indicates the screwed length in round number regardless the length of the stud.)