| DESIGNATIONS |
THREAD SERIES |
REFERENCE |
| UN, UNC, UNF, UNEF, UNS |
Unified Inch Screw Threads (UN and UNR Form) |
B1.1 |
| Gages & Gaging for Unified Inch Screw Threads |
B1.2 |
| UNJ, UNJC, NJF, UNJEF, UNJS |
Unified Inch Screw Threads (UNJ Thread Form) |
B1.15 |
| Screw Thread Gaging Systems for Dimensional Acceptability-Inch and Metric Screw Threads (UN, UNR, UNJ, M and MJ) |
B1.3M |
| N-5 HF, NC-5CSF, Etc. |
Class 5 Interference-Fit Thread |
B1.12 |
| M |
Metric Screw Threads-M Profile |
B1.13M |
| Gages and Gaging for Metric M Screw Threads |
B1.16M |
| MJ |
Metric Screw Threads-MJ Profile |
B1.21M |
| Gages and Gaging for Metric MJ Series Metric Screw Threads |
B1.22M |
| UNM |
Unified Minature Screw Threads |
B1.10 |
| NPT |
Pipe Threads, General Purpose |
B1.20.1 |
| NPTF, PTF-SAE Short, Etc. |
Dryseal Pipe Threads |
B1.20.3 |
| Gaging for Dryseal Pipe Threads |
B1.20.5 |
| ANPT |
Pipe Threads, Taper Aeronautical National Form Symbol ANPT Design and Inspection Standard |
SAE AS71051 |
| NPSM |
American Standard Straight Pipe Threads for Free-Fitting Mechanical Joints for Fixtures |
B1.20.1 |
| NPSL |
American Standard Straight Pipe Threads for Loose-Fitting Mechanical Joints with Locknut |
B1.20.1 |
| NPSC |
American Standard Straight Pipe Threads in Pipe Couplings |
B1.20.1 |
| NPSF |
Dryseal American Fuel Internal Straight Pipe Threads |
B1.20.3 |
| NPSI |
Dryseal American Intermediate Internal Straight Pipe Threads |
B1.20.3 |
| NH, NPSH, NHR |
Hose Coupling Screw Threads |
B1.20.7 |
| NH |
Fire Hose Connections |
NFPA 1963 |
| NGT, SGT |
National Gas Taper Threads |
CGA V-1 |
| NGO |
National Gas Outlet Threads |
CGA V-1 |
| NGS |
National Gas Straight Threads |
CGA V-1 |
| R, Rc, Rp (BSPT) |
British Taper Pipe Threads & Gages |
BS21 |
| G (BSPP) |
British Straight Pipe Threads & Gages |
BS2779 |
| BSW, BSF |
British Parallel Screw Threads of Whitworth Form |
BS84 |
| BA |
British Screw Threads |
BS57 |
| ACME |
Acme Screw Threads, General Purpose |
B1.5 |
| ACME-C |
Acme Screw Threads, Centralizing |
B1.5 |
| STUB ACME |
Stub Acme Screw Threads |
B1.8 |
| BUTT |
Buttress Inch Screw Threads 7º/45º |
B1.9 |
| AMO |
Microscope Objective Thread |
B1.12 |
| AWWA |
Underground Service Line Valves and Fittings |
C800-84 |
| DIN |
German Specifications |
|
| JIS |
Japanese Industrial Standard |
|
| ISO |
International Standard Organization |
|
