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螺纹资料
螺纹代号
Thread symbol
螺纹Thread
参考标准
Reference Standard
牙型角
Thread Angle
M
公制螺纹
粗牙系列Coarse series
ISO68GB196
60°
Metric screw threads
细牙系列Fine series
ISO724GB196
S
小螺纹Miniature screw threads
ISO1501GB/T15054
UNC
统一螺纹
Unified threads
粗牙系列Coarse series
ANSI B 1.1
UNF
细牙系列Fine series
UNEF
特细牙系列
Extra-Fine series
UNS
特殊直径、螺距、衔接长度系列
Special diameter\pitch length of engagmentand
UN
等螺距系列
Constant-pitch series
Tr
公制梯形螺纹
Metric trapezoidalscrew threads
ISO2904GB5796
30°
TM
30梯形螺纹
30trapezoidalscrew threads
R
螺纹密封的管螺纹
Pipe threads where pressure-tight joints are made on the threads
锥管内螺纹
Taper external screw threads
ISO/R7GB7306
55°
1/16 Taper
Rc
锥管外螺纹
Taper internal screw threads
RP
直管螺纹
Parallel internal pipe threads
55°
G
非螺纹密封的管螺纹
Pipe threads where pressure-tight joints are not made on the threads
ISO/R228GB7307
NPT
通用美标锥管螺纹
American Standards taper pipe threads for general use
ANSI/ASEM B1.20.1GB/T12716
60°
1/16 Taper
NPSC
美标直管接头螺纹
American Standards striaght pipe threads in pipe coupling
ANSI/ASEM B1.20.1
60°
NPSM
美标直管机用自由配合接头联接螺纹
American Standards striaght pipe threads for free-fitting mechanical joints for fixtures
NPTF
美标燃料直管内螺纹
Dryseal American standards fuel internal straight pipe threads
ANSI B1.20.3
60°
1/16 Taper
NPSF
美标锥管气密螺纹
Dryseal American standards taper pipe threads
60°
BA
英标联接螺纹
British association threads
BS93
47°30〃
BSC
英标自行车螺纹
British standards cycle threads
BS811
60°
BSW
英标惠氏螺纹
British standards Whitworth threads
BS84
55°
BSF
英标细牙螺纹
British standards fine threads
BSMO
英标显微镜螺纹
British standards microscope objective threads
BS3569
FG
(德国)自行车螺纹
(Germany)Cycle threads
DIN79013
60°
Pg
(德国)薄钢管螺纹
(Germany)Steel conduit threads
DIN40430
80°
 

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