ANSI Screw Thread Designations and Symbols A - N
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Fastener and Screw / Bolt Design, Formula and Calculations
Screw Thread Designations and Symbols A - N
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 |