The following chart contains industry standard designations for Screw thread types.
| ACME 60° STUB |
60° Stub thread form |
| ACME STUB |
Stub Acme thread form |
| ACME-C |
Acme thread - centralizing |
| ACME-G |
Acme thread, general purpose |
| ANPT |
Aeronautical National Form taper pipe thread |
| AWWA |
American Water Works Association |
| BA |
British Association Standard thread form |
| BSF |
British Standard Fine thread series |
| BSPP |
British Standard Pipe Parallel |
| BSPT |
British Standard Pipe Taper |
| BSW |
British Standard Whitworth |
| MM |
ISO Metric thread form |
| N BUTT |
American Buttress screw thread |
| NC |
American National Coarse thread series |
| NEF |
American National Extra-Fine thread series |
| NF |
American National Fine thread series |
| NGO |
American National gas outlet threads |
| NGT |
American National gas taper threads |
| NH |
American National hose & fire hose coupling |
| NM |
National Miniature thread series |
| NPS |
American Standard straight pipe thread |
| NPSC |
American Standard straight pipe thread in couplings |
| NPSF |
American Standard internal straight pipe thread (dryseal) |
| NPSH |
American Standard straight pipe thread for hose couplings & nipples |
| NPSI |
American Standard intermediate straight pipe thread (dryseal) |
| NPSL |
American Standard straight pipe thread for locknuts |
| NPSM |
American Standard straight pipe thread for mechanical joints |
| NPT |
American Standard taper pipe thread |
| NPTF |
Dryseal American Standard taper pipe thread |
| NPTR |
American Standard taper pipe thread for rail fittings |
| NS |
Special threads of American National Form |
