美制六角螺母.doc

美制六角螺母 Q/ML17-2002Q盐城民力机械有限公司标准Q/ML17-2002美制六角螺母2002-05-01发布 2002-05-01实施盐城民力机械有限公司 发布盐城民力机械有限公司标准美制六角螺母Q/ML17-2002 1、范围1.1 本标准规定了美制六角螺母的尺寸和技术要求。1.2 本标准适用于阀门出口产品。2、尺寸2.1 形式尺寸按图1及表1规定。3、技术要求3.1 技术条件按ASTM A194/A194M-94b中的有关规定。3.2 螺纹及表面应无裂纹和毛刺等缺陷。4、标记直径3/8粗牙螺纹 每英寸16牙 2B级 不经表面处理的美制六角钢螺母的标记示例；螺母3/8-16 UNC 2B Q/AKDF12-2000；直径3/8细牙螺纹 每英寸24牙 2B级 表面镀锌处理的美制六角螺母的标记示例；螺母3/8-24 UNF 2B镀锌Q/AKDF12-2000；5、公称直径与粗牙螺纹及细牙螺纹的对应关系（见表）图 表 规格支承面端面跳动(FIR)最大每千件纲螺母重 量(Kg).(in)每英寸牙数最 大最 小最 大最 小最 大最 小保证应力1050MPa保证应力1050MPa1/42028.3211.1210.885.745.3912.8212.400.380.253.335/161824.3212.7012.436.936.5614.6514.150.400.274.993/81624.3214.2714.008.558.1316.5115.960.430.307.207/161420.2817.4717.159.779.7820.1619.510.450.3312.881/21320.2819.0518.7011.3710.8521.9921.340.480.3517.019/161218.2422.2221.8712.5912.0225.6524.950.500.3826.445/81118.2423.8223.4214.1913.5927.5026.700.530.4033.253/41016.2028.5727.6416.8915.6832.9931.500.580.4553.987/8914.2033.3232.2419.7118.3938.5036.760.630.5086.181812.2038.1036.8322.5221.1143.9941.990.680.55128.371-1/8712.1842.8741.4325.3723.8649.5047.220.760.63182.801-1/4712.1847.6246.0327.7826.1754.9952.480.830.71246.301-3/8612.1852.3750.6530.6328.9160.5057.740.910.78331.131-1/2612.1857.1555.2333.4531.6365.9863.000.990.86427.74表 公称直径d英寸粗牙UNC每英寸牙数细牙UNF每英寸牙数公称直径d英寸粗牙UNC每英寸牙数细牙UNF每英寸牙数1/420287/89145/1618248123/816241-1/88UN127/1614201-1/48UN121/213201-3/88UN129/1612181-1/28UN12