Epson LQ-2550 Technical Manual page 166

Small parts are described using the following abbreviations.
Abbreviation
Cs
CBS
CBS (0)
CP (o)
CP (P)
HNO
LS
RE
Table 4-5 describes the relationship between the form of screw and its abbreviated part name.
Top
cross–recessed
e
Table 4-4. Abbreviations for Small Parts
Cup Screw
Cross-Bind-head screw
Cross-Bind-head with Outside-toothed washer
Cross-Bind-head B-tight
Cross-Bind-head S-tight
Cross-Bind-head S-tight with Outside-toothed washer
Cross-Pan-head with Spring washer
Cross-Pan-head S-tight with Outside-toothed washer
Cross-Pan-head S-tight with Plain washer
Cross-Pan-head with Outside-toothed washer
Cross-Pan-head with Plain washer
Hexagon Nut with Outside toothed lock washer
Plain Washer
Leaf Spring
Retaining ring type-E
Table 4-5. Screw Types and Abbreviated Part Names
Head
Side
head 1.~ind
(with Ijotch)
Part Name
1 .~ormal
!&tight
4-4
Washer
lock washer
.