Abbreviation |
Country |
Thread Angle
( ¢X ) |
Description |
ISO |
¡@ |
60¢X |
International Organization for
Standardization |
NC |
USA |
60¢X |
National Coarse |
UNC |
USA |
60¢X |
Unified National Coarse |
NF |
USA |
60¢X |
National Fine |
UNF |
USA |
60¢X |
Unified National Fine |
UNEF |
USA |
60¢X |
Unified National Extra
Fine |
UN |
USA |
60¢X |
Unified National 8-,12- and 16
pitch series |
UNS |
USA |
60¢X |
Special Threads of
American National Form |
NPT |
USA |
60¢X |
National
Taper Pipe 1:16 |
NPTF |
USA |
60¢X |
National
Taper Pipe Dry seal 1:16 |
NPS |
USA |
60¢X |
National
Standard Straight Pipe |
NPSM |
USA |
60¢X |
National
Standard Straight Pipe for free fitting mechanical |
NPSF |
USA |
60¢X |
National
Standard Internal Straight Pipe Dry seal |
BSW |
GB |
55¢X |
British
Standard With worth Coarse |
BSF |
GB |
55¢X |
British
Standard Fine |
BSP |
GB |
55¢X |
British
Standard Pipe |
BSPT |
GB |
55¢X |
British
Standard Pipe Taper |
BA |
GB |
47¢X |
British
Standard Association |