Toshiba TECRA A11 Series Maintenance Manual page 300

Screw Notation
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.
Format :
Screw type + Screw length (mm)
Scr ew shape
B: Bind screw
F: Flat head screw
S: Super thin head screw
T: Tapping screw
U: Other screws (Unique screws: pan
xample: B6 ... 6mm BIND screw
E
Scr ew color/material
B: Black/Nickel
C: Silver/Non-Hexavalent Chromate
U: Other screws (Unique screws: such as stud, etc.)
4-10 [CONFIDENTIAL] TECRA A11/S11/P11 Satellite Pro S500 Series Maintenance Manual (960-784)
head, stud, etc.)