螺栓和螺钉用通孔尺寸表.doc
3页
螺栓和螺钉用通孔尺寸表螺纹 规格 d通孔do系列装配中等 装配粗 装配ML61.71.32M]J522.12.2M22.22.42ZM2.S[2J 12・93.1M33.23.43.63J3.94.2M44.34.54.6M4.54.655.3MS5.35.55.5M66.46.67M77./7.68MBa .4910MIO10.61112M121313.514.5MU1515.516.5M161717.518.3M18192021M20匸2224螺纹 规格 d通孔do系列楮 装配中等 装配粗 装配M22232426M24252620M27203022M303133r 35 1M33343638M36373942M39404245M42434546M4S464352M48505256M525456r 62MS65062S6M60626670M64667074M6670747QM72747882攻螺纹前底孔直径的确定攻米制螺纹P<1 mm； 氏=d—PFErrirri： do=ci—〔1XM〜146) P式中匕P—距(mm)；4—占头直径〔mm〕； d—纹?2■称直径(mm)攻不通孔螺纹钻孔滦度=斯需螺心来度+0.7d另外，也可查表求得:(1)普通螺纹攻螺纹前底孔的钻头直径称直径d甥距P钻头直径do.祷飪、W 铜、黄铜钢、可槪钙20.40.251.61.751.61.75M50.352.052.1<52X)52A530.50.3E2.52^62.S2Z540.53.33.53.33.550.30.54.14.54卫4^610.75455.265.2□1,2510.756.66.9712101,51.2510.756.4 S.6 S.?9.1亦 时99.2121兀1 £1.25110J10.410丄10.910.210.510.71 1輙公 称直径d螂E p詁％直性do祷很＜楓可褫诗铁、紫铜铜r黄铜1421-511 1j012-412.91212.5131621-5113- 814- 414-91J14.515IB2.521.5115j016-416.715.51616.517202-521.5117-3 17-S 18.4 is.?17.51818.519222.521.5119_3 1加2。
•斗20-?19.52020.5212432L5120-72W22.422-9212222.522(2)非螺纹密封的管螺纹攻螺纹前钻底孔的钻头直径螺纹公称直径(”)1/81/43/81/23/4111/4.3,_1 /811/2每内牙数281919141411111111钻头直径(mm（3）英制锥管螺纹和英制锥螺纹攻丝前钻底孔的钻头直径英制锥管螺纹英制锥螺纹公称直径每钻头直径公称直径每钻头直径(")内牙数(mm（"）内牙数（mr）1/8281/8271/4191/4183/8193/8181/2141/2143/4143/4141111111/211/41111/4111/211/21111/2111/22112111/256。
