MPointforExternalMetricThread,CoarsePitchGMW3362
Fasteners公制外螺纹的M端部，粗牙紧固件
共4页第1页
通用
1Scope
ThisstandardspecifiesthecharacteristicsofMPointsforexternalmetricthreadedfastenerswithcoarsepitchM5,M6,M8,
M10,M12,M14andM16.Thepointisaddedtothespecifiednominallengthofthefastener.
1．范围
本标志适用于公制外螺纹紧固件的M端部，其粗牙规格为M5,M6,M8,M10,M12,M14和M16。
端部是附加在规定的紧固件公称长度上。
2References
Note:Onlythelatestapprovedstandardsareapplicableunlessotherwisespecified.
2.1ExternalStandards/Specifications.
None
2.2GMStandards/Specifications.
GMW3001GMW3059
2．参考
备注：除非有其他规定，仅采用最近批准的标准。
2．1外标准/规范。
无
2．2通用标准/规范。
GMW3001GMW3059
3Requirements
3.1Dimensions.Alldimensionsinthisstandardaregiveninmillimeters(mm)unlessotherwisestated.
3．要求
3．1尺寸。除非其他规定，本标准的所有尺寸单位是毫米(mm)。
3.1.1NominalLength.Thenominallengthofthefastenerisl.Forluptoandincluding50mmthetoleranceonlshallbe+/-
0.15.Forlover50mmthetoleranceonlshallbe+/-0.25.Thenominallength,l,isthedistance,paralleltothefastener
axis,fromthebearingsurfacetotheleadthreadwherethethreadprofilefirstexceeds0.20timesthethreadpitchinheight
(measuredfromthethreadroot).
3．1．1公称长度。紧固件的公称长度是l。对于小于等于50的I，其公差是+/-0.15。对于大于50mm的I，其公
差是+/-0.25。公称长度I，平行于紧固件的中心轴，是指从支撑面至向导螺纹的长度，其中螺纹牙形的高度超过0.20倍的螺
距（从牙底测量）。
3.1.2MPointThread.TheMPointthreadlength,u,isareferencedimensionusedforcalculationpurposes.Theprofileof
allleadthreadsshallnotexceedmaximummaterialconditionboundariesofthestandardthread.Atleastonecompleteturn
(360degrees)ofthefirst2threadsshallbesmoothlyanduniformlycurvedforitsentireprofile,withnolocalizedscallops,
fissures,under