英、美制紧固件螺纹 p! ^, O$ p6 a/ H1 e1 r
英寸制螺纹包括惠氏螺纹(Whitworth thread)和统一标准螺纹(Unified thread)。% J, K. ?% L; M; K
惠氏螺纹是英国英寸制规格紧固件用普通螺纹,其牙型角为55°,习惯用公称直径(单位为英寸inch)及每英寸牙数来表示,尺寸单位采用符号“ ” ”。例如:1/2”-12BSW表示公称直径为1/2”的粗牙惠氏螺纹。/ I. r. R6 w# z w# {" ^
统一标准螺纹是美国英寸制规格紧固件用普通螺纹,其牙型角为60°,一般用号码(公称直径﹤1/4”)或公称直径的英寸分数(≥1/4”)、每英寸牙数和代号(UNC、UNF)来表示。例如:1/2”-13UNC表示公称直径为1/2”的粗牙统一标准螺纹。+ V' V/ V5 s6 i& J7 I
惠氏螺纹和统一标准螺纹公称直径与每英寸牙数% ~. ~; [8 U& [3 F& o; q
螺纹大径 统一标准螺纹ANSI B1.1-182 惠氏螺纹BS84-1956( _4 J0 S& @! X) c7 O$ K! T% x
inch 尺寸代号 粗牙UNC 细牙UNF 尺寸代号 粗牙BSW 细牙BSF$ q/ ]' E0 e: n$ U$ q* p: d
0.0600 0# 80 ; n2 w: O+ H9 W! p' w7 {
0.0625 1/16 60
6 c6 ~, L7 A: e( {0.0730 1# 64 72 5 T; Q6 D! Z1 U3 O, j
0.0860 2# 56 64
( x) ?" H9 ` j1 K0 ^1 a, ~0.0938 3/32 48 $ c1 F$ Q+ }7 a: d- R! x% H
0.0990 3# 48 56
1 q+ _+ }* t* ~' ]. h. m5 ]4 ^0.1120 4# 40 48
% u7 z3 [9 i, G# _7 W6 L: Q0.1250 5# 40 44 1/8 40 L6 G/ ]; q) s8 K4 w5 \
0.1380 6# 32 40 * D' r' o5 S' d# U
0.1563 5/32 32
0 p# i. n3 s, E0.1640 8# 32 36
3 H4 R1 T4 H1 M6 H0.1875 3/16 24 32" F3 }1 O" V; a3 \$ a; c, ]
0.1900 10# 24 32 - ^) M; H0 Q& {
0.2160 12# 24 28 / ^8 o- u4 ~6 F0 v) R+ N; Z
0.2189 7/32 24 28
2 A( y* Q9 o' R' g8 U0.2500 1/4 20 28 1/4 20 26
" p o9 C6 n* N7 k* z0.2812 9/32 26! W. d6 S. h, ^9 m ]
0.3125 5/16 18 24 5/16 18 22
( \7 q' Y. [/ D9 [0 u) F. ?" x! R0.3750 3/8 16 24 3/8 16 202 l* \3 g3 F5 l7 H1 M7 ^" E" T
0.4375 7/16 14 20 7/16 14 18$ D; S' O& W A! a
0.5000 1/2 13 20 1/2 12 16; X4 }, `, u. G; B% p# t
0.5625 9/16 12 18 9/16 12 165 E. z( m- u1 X8 O3 h* K
0.6250 5/8 11 18 5/8 11 14
6 \2 g0 b# I7 B0 G8 A) H2 s5 K k0.6875 11/16 11 14! x f5 c. o) e9 H/ t7 t1 b4 a" g# N
0.7500 3/4 10 16 3/4 10 12
. i/ d! N5 e! ^" D/ R0.8125 13/16 12
4 M# i0 S& |+ b0.8750 7/8 9 14 7/8 9 11
3 M2 x( l' |4 z" G8 z/ ^+ v1.0000 1 8 12 1 8 10
/ G" O" H+ d! T& |. t! R1.1250 1-1/8 7 12 1-1/8 7 9: d+ q* l1 m. s; r* X
1.2500 1-1/4 7 12 1-1/4 7 9, G* K9 G! p7 \2 X# B- c" s
1.3750 1-3/8 6 12 1-3/8 8% c4 S/ X3 l6 r1 t3 ~- I
1.5000 1-1/2 6 12 1-1/2 6 8
) R( m0 T6 y+ O0 Q. C1.6250 1-5/8 1-5/8 8! {/ k2 `" }0 x" N6 F7 M
1.7500 1-3/4 5 1-3/4 5 7
) x) K5 S6 e2 `4 x/ i2.0000 2 4.5 2 4.5 77 x, ?# T. E. g
2.2500 2-1/4 4.5
& h/ W1 W" o" E8 p, M$ U2.5000 2-1/2 4
" f6 q2 T* a7 ^, x1 k0 @2.7500 2-3/4 4 , n# C7 S+ Y8 ^% T2 V I ^0 k
3.0000 3 4
! h/ @: D1 |) v: F2 x/ M' j7 ~3.2500 3-1/4 4
- f0 X9 R' ?) [6 A3.5000 3-1/2 4 ! x6 G0 ]7 M5 n- j( \
3.7500 3-3/4 4 $ }; J4 R$ T" O
4.0000 4 4 + c i- X2 W/ C n6 z$ i
0 f; z+ g# `. A$ M备注:各种英、美制螺纹代号说明6 a$ q& h; n- ^9 l
BA-British Association
( F3 e. U3 A( _8 e9 U( c BSW-British Standard Whitworth
7 m/ M, s2 h7 N2 L) b7 m BSF-British Standard Fine" S& M" I% `+ d% e4 j
BSP-British Standard Pipe* W5 [: y; x% M" e" m+ a
BSPT-British Standard Pipe Tapered
" F; @# z$ `& e( ]( N* {0 l) [ BSC-British Standard Cycle: B) C4 U0 K: R
UNC-Unified National Course , Y! \1 c/ H- e# Q. ^
UNF-Unified National Fine
* [" G% |! \2 F! |8 B UNEF-Unified National Extra Fine 9 C. `6 T$ @9 a& m, g4 X* I7 Q8 ^1 F
UNM-Unified National Miniature
" C; s3 h% j' H) C/ r2 ] NPT-National Pipe Tapered |