ANSI Thread Series Designations
Gage Assembly manufactures gages to the following ANSI Thread Series Designations:
| 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, UNJF, UNJEF, UNJS | Unified Inch Screw Threads (UNJ Thread Form) | B1.15 |
| Screw Thread Gaging Systems for Acceptability-Inch and Metric Screw Threads (UN, UNR, UNJ, M and MJ) | B1.3 | |
| NC-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 MJ Series Metric Screw Threads | B1.22M | |
| UNM | Unified Miniature Screw Threads | B1.10M |
| 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 | H28/9A |
| NGO | National Gas Outlet Threads | H28/9A |
| NGS | National Gas Straight Threads | H28/9A |
| R, Rc, Rp (BSPT) | British Taper Pipe Threads & Gages | BS21/EN 10266 |
| G (BSPP) | British Straight Pipe Threads & Gages | EN ISO 228-1/2 |
| 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 7°/45° | B1.9 |
| AMO | Microscope Objective Thread | B1.11 |
| ANSE/AWWA | Underground Service Line Valves and Fittings | C800-05 |
| DIN | German Specifications | |
| JIS | Japanese Industrial Standard | |
| ISO | International Standard Organization |
Notes (1) All Threads, Except NGO, are Right Hand Unless Otherwise Designated. For NGO Threads, Designations RH or LH are required.