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  　=>　螺紋資料 - 包括公制、美制、英制、直管螺紋、錐管螺紋
 
螺紋代號
Thread symbol

螺紋Thread
參考標(biāo)準(zhǔn)
Reference Standard
牙型角
Thread Angle
M
公制螺紋
粗牙系列Coarse series
ISO68GB196
60°
Metric screw threads
細(xì)牙系列Fine series
ISO724GB196
S
小螺紋Miniature screw threads
ISO1501GB/T15054
UNC
統(tǒng)一螺紋
Unified threads
粗牙系列Coarse series
ANSI B 1.1
UNF
細(xì)牙系列Fine series
UNEF
特細(xì)牙系列
Extra-Fine series
UNS
特殊直徑、螺距、銜接長度系列
Special diameter/pitch length of engagmentand
UN
等螺距系列
Constant-pitch series
Tr
公制梯形螺紋
Metric trapezoidalscrew threads
ISO2904GB5796
30°
TM
30梯形螺紋
30trapezoidalscrew threads
R
螺紋密封的管螺紋
Pipe threads where pressure-tight joints are made on the threads
錐管內(nèi)螺紋
Taper external screw threads
ISO/R7GB7306
55°
1/16 Taper
Rc
錐管外螺紋
Taper internal screw threads
RP
直管螺紋
Parallel internal pipe threads
55°
G
非螺紋密封的管螺紋
Pipe threads where pressure-tight joints are not made on the threads
ISO/R228GB7307
NPT
通用美標(biāo)錐管螺紋
American Standards taper pipe threads for general use
ANSI/ASEM B1.20.1GB/T12716
60°
1/16 Taper
NPSC
美標(biāo)直管接頭螺紋
American Standards striaght pipe threads in pipe coupling
ANSI/ASEM B1.20.1
60°
NPSM
美標(biāo)直管機(jī)用自由配合接頭聯(lián)接螺紋
American Standards striaght pipe threads for free-fitting mechanical joints for fixtures
NPTF
美標(biāo)燃料直管內(nèi)螺紋
Dryseal American standards fuel internal straight pipe threads
ANSI B1.20.3
60°
1/16 Taper
NPSF
美標(biāo)錐管氣密螺紋
Dryseal American standards taper pipe threads
60°
BA
英標(biāo)聯(lián)接螺紋
British association threads
BS93
47°30〃
BSC
英標(biāo)自行車螺紋
British standards cycle threads
BS811
60°
BSW
英標(biāo)惠氏螺紋
British standards Whitworth threads
BS84
55°
BSF
英標(biāo)細(xì)牙螺紋
British standards fine threads
BSMO
英標(biāo)顯微鏡螺紋
British standards microscope objective threads
BS3569
FG
（德國）自行車螺紋
(Germany)Cycle threads
DIN79013
60°
Pg
（德國）薄鋼管螺紋
(Germany)Steel conduit threads
DIN40430
80°
 
*以上技術(shù)資料僅供參考*
 
 
 
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