公制/美制/英制螺纹对照表A型美制螺纹〔UNF〕常用规格外螺纹内螺纹-49/16°-19 牙 14.2813.08-611/16H-16 17.4616.1-813/1616 20.6419.28-101M-14 25.40 23.57-121(3/16)12 30.0028.32-161(7/16)M-12 36.5134.67-201(11/16)H-12 42.86 41.02C型JIC37度美制UNF螺纹常用规格-4 7/16-20 11.11 10.03-5 1/2n-20 12.70 11.32-6 9/16=8 14.28 13.08-8 3/4〞・16 19.00 17.68-107/8J4 22.22 20.68-121(1/16)M-1226.9825.15-161(5/16)M-1233.3331.5-201(5/8)H-1241.2839.44-241(7/8)1247.6245.8-322(W2)J263.561.67英制圆柱管螺纹(BSPP)常用规格-4 1/4M-19 13.157 11.55-6 3/8〞・19 16.662 14.95-8 1/2n-14 20.955 18.63-12 3/4=4 26.441 24.11-16 V-11 33.249 30.29-20 1(1/4)H-11 41.91 38.95英制圆锥管螺纹〔BSPT〕常用规格 基而大径基准距离1/4"-1913.15763/8"-1916.6626.41/2"-1420.9558.23/4"-1426.4419.5V-1133.24910.41(1/4)H-11 41.91 12.7美制圆锥管螺纹〔NPT〕1/8H-2710.2441/4"-1813.6043/8"-1817.044.321/2"-1421.224.483/4"-1426.574.75r-11(1/2)P 33.22 4.61 (1/4)31.5 41.96 4.83美制外螺纹〔2A〕常用规格极限尺寸表〔粗牙〕打印|推荐|评分2007-4-20 16:33美制外螺纹〔2A〕常用规格极限尺寸表〔粗牙〕公称尺寸和每英 寸牙数螺纹系列 代号大径极限中径极限小径max螺胚直径最小 最大最小最大最小最大8-32UNC0. 1571 0. 1631 0. 13990. 1428 0. 1248 3. 583.61(0. 164-32)3. 99034. 14273. 55353. 62713. 169910-240. 18180. 1896 0. 15860. 1619 0. 13794. 074. 10(0.190-24)4.61774. 80064. 02844. 11233. 502712-240. 20780. 215C0. 18450. 1879 0. 16394. 724. 75(0. 216-24)5. 27815. 46104. 68634. 77274. 16311/4-200. 24080. 24890.2127 0.2164 0. 18765.455.48(0. 250-20)6. 11636. 32215. 40265. 4966 4. 76505/16-180. 30260. 31130. 27120.27520. 24316. 946. 98(0. 3175-18)7. 68607. 90706. 88856. 99016. 1747评论(7)3/8-160.36430.3737 0.3287 0.33310.29708.408.44(0.375-16)9.2532 9.49208.34908.46077.54387/16-140.42580.4361 0.3850 0.3897 0.34859.839.87(0.4375-14)10.8153 11.07699.77909.89848.85191/2-130.48760.4985 0.44350.44850.404111.3411.38(0.50-13)12.385012.661911.264911.391910.26419/16-120.54950.5609 0.5016) 0.50680.458712.8012.84(0.5625-12)13.957314.246912.740612.872711.65105/8-110.61130.6234 0.55890.56440.511914.2714.32(0.625-11)15.527015.834414.196114.335813.00233/4-100.73530.7482 0.67730.68320.625517.2817.33(0.750-10)18.676619.004317.203417.353315.88777/8-90.8592 10.8731 0.79460.80090.736820.2720.32(0.875-9)21.823722.176720.182820.342918.7147lM-80.9830 0.9980 0.91000.91680.844623.2223.27(1.000-8)24.968225.349223.114023.286721.45281 •螺胚直径指滚丝前的尺寸.数值为依经验公式计算而得,在实践中需验证.2•标i己例如：10-24UNC-2A(或 0.190-24UNC-2A). 3/8-16UNC-2A(或 0.375-16UNC-2A)(注：表中上行斜体数值单位为英寸,下行为毫米)lanjibingyu2007-4-20 16:34关制外螺纹(2A)常用规格极限尺寸表(细牙)公称尺寸和每英寸牙数 螺纹系列代号最小 最大8-36 UNF0.15770.1632大径极限中径极限小径max螺胚直径最小最大最小 最大0.14240.14520.12913.65 3.673.61703.68813.2791(0.164-36)4.00564.145310-320.18310.18910.16580.16880.15084.244.27(0.190-32)4.65074.80314.21134.28753.83034.85(0.216-28)5.2959 5.46104.79044.87174.34851/4-280.24250.2490 0.2225 0.22580.20525.69(0.250-28)6.1595 &32465.65155.73535.21215/16-240.30420.3114 0.2806 0.2843 0.2603： 7.17(0.3175-24)7.7267 7.90967.12727.22126.61163/8-240.36670.3739 0.3430 0.34680.32288.75(0.375-24)9.3142 9.49718.71228.8087& 19917/16-200.42810.4362 0.39950.40370.374910.19(0.4375-20)10.8737 11.079510.147310.25409.52251/2-200.49060.4987 0.46190.46620.437411.78(0.50-20)12.461212.667011.732311.841511.11009/16-180.55240.5611 0.52050.52500.492913.27(0.5625-18)14.0310| 14.251913.220713.335012.51975/8-180.61490.6236 0.58280.58750.555414.85(0.625-18)15.618515.839414.803114.922514.10723/4-160.73910.7485 0.70290.70790.671817.91(0.750-16)18.773119.011917.853717.980717.06377/8-140.86310.8734 0.82160.82700.785820.93(0.875-14)21.922722.184420.868621.005819.95931H-120.9868 10.9982 0.93820.94410.896023.90(1.000-12)25.064725.354323.830323.980122.758412-280.2085 0.21500.18860.19180.17124.825.717.208.7810.2311.8213.3114.8917.9520.9723.951・螺胚直径描滚丝前的尺寸.数值为依经验公式il•算而得.在实践中需验证.2•标记例如：10-32UNF-2A(或 0.190-32UNF-2A). 3/8-24UNF-2A(或 0.375-24UNF-2A)矣制外螺纹(2A)常用规格极限尺寸表(粗牙)[B匕传图片:大径min尿f、耘晟小最K埶卜最K8-36(0.16456)a u^(?3 40360. M2(?3. 60680. 116Q3. 70840. 11S63.7998(f.伽 04.16563. 453. 6710-32(0.190-32)o. is&o3 96240.他 04.16560. 169?4.31040. 1?364.40944.82604.00。