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