Mitsubishi FG15N Service Manual page 7

Symbols or abbreviation
OP Option
R1/4 Taper pipe thread (external) 1/4 inch (formerly PT1/4)
Rc1/8 Taper pipe thread (internal) 1/8 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)
Units
1. SI Units are used in this manual.
2. The following table shows the conversion of SI unit and customary unit.
Item SI unit
1 N
Force
1 lbf
1 kPa
Pressure
1 psi
1 N·m
Torque
1 lbf·ft
Customary unit
0.1012 kgf
0.4536 kgf
0.0102 kgf/cm 2
0.0703 kgf/cm 2
0.1012 kgf·m
0.1383 kgf·m