7
Symbols and abbreviations
Units
(1) SI Units are used in this manual.
(2) The following table shows the conversion of SI
unit and customary unit.
OP
Option
R1/4
Taper pipe thread (external) 1/4 inch (formerly PT1/4)
RC1/8
Taper pipe thread (external) 1/4 inch (formerly PT1/8)
G1/4A
Straight pipe thread (external) 1/4 inch (formerly PF1/4-A)
Rp1/8
Straight pipe thread (internal) 1/8 inch (formerly PS1/8)
Item
SI unit
Customary unit
Force
1 N
0.102 kgf
1 lbf
0.4536 kgf
Pressure
1 kPa
0.0102 kgf/cm
2
1 psi
0.0703 kgf/cm
2
Torque
1 N·m
0.102 kgf·m
1 lbf·ft
0.1383 kgf·m
