符号螺纹种类规范牙型角
M公制粗牙ISO26160°
S细小螺丝ISOR150160°
UNC统一牙粗牙ISO26360°
UNF统一牙细牙ISO26360°
UNEF统一牙特细牙ISO26360°
UN统一牙固定牙ISO26360°
UNS统一牙特殊牙-----60°
NC美制牙粗牙ANSIB1.160°
NF美制牙细牙ANSIB1.160°
NEF美制牙特细牙ANSIB1.160°
N美制牙固定牙ANSIB1.160°
NS美制牙特殊牙ANSIB1.160°
BSW英制牙粗牙BS8455°
BSF英制牙细牙BS8455°
BC自行车牙JISB022560°
SM针车用JISB022660°
CTV自行行车用风嘴JISD942260°
TV汽车用风嘴JIDD420760°
BSC英制自行车BS81160°
BA英制小螺丝BS9330°47°
Tr公制爱克母牙ISO290230°
TW爱克姆牙JISB022229°
ACME爱克姆牙ANSIB1.529°
STUB-ACME浅牙爱克姆ANSIB1.829°
C平行管用螺纹ISO228/155°
BSPF英制平行管螺纹BS277955°
PF英制平行管螺纹ISB020255°
R管用推拔管用ISO7/155°1/16
Rc管用推拔内螺纹ISO7/155°1/16
Rp管用平行内螺纹ISO7/155°
PT推拔管用JISB020355°1/16
PS平行内螺纹JISB020355°
BSP英制管牙BS21.277955°
NPT美制一般推拔管用ANSIB2.160°1/16
NPTR美制栏杆接头用ANSIB2.160°1/16
NPS美制一般平行管用ANSIB2.160°
NPSM美制平行管用装配器用ANSIB2.160°
NPSL美制锁紧螺帽用ANSIB2.160°
NPSH美制水管用ANSIB2.160°
NPSC美制管接头用ANSIB2.160°
NH美制消防水管用ANSIB2.160°
NPSF美制干封管用平行内螺纹ANSIB2.160°
NPTI美制干封管用平行ANSIB2.160°
NPTF美制干封管用推拔ANSIB2.160°1/16
NGT美制瓦斯用推拔ANSIB57.160°1/16
NGS美制瓦斯用平行ANSIB57.160°
NGO美制瓦斯用出口ANSIB57.160°
SGT美制瓦斯用特殊ANSIB57.160°1/8
E电灯泡用JISC7709圆
V瓦斯桶凡而用JISB8245/655°3/26
C薄铜电线管用JISB020480°