Transcription of JIS (Japanese Industrial Standard) Screw Thread
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JIS (Japanese Industrial Standard) Screw Thread
Screw ThreadTECHNICAL DATAJIS ( japanese Industrial Standard) SpecificationsCourtesy of:Note: Although these specifications are basedon JIS they also apply to ISO and DIN comments added by Maryland Metricscopyright 2002 maryland metrics/osg corporation(1) Flank : Thread face (excluding crestand root of Thread profile)(2) Crest :The tap surface joining thetwo sides or flanks of athread(3) Root :The bottom surface joiningthe flanks of two adjacentflanks(4) Angle of Thread : Angle between adjacentflanks measured at thecross section of screwthread - including the axis ofthe Screw Thread (5) Flank angle :The angle between theindividual flank and theperpendicular to the axis ofthe Thread measured in theaxial plane(6) Pitch :The distance from a pointon one Thread to acorresponding point on thenext Thread measuredparallel to the axis(7) Lead :The distance a Screw threadadvances axially in onecomplete turn(8) Lead angle :Angle formed by a helixpassing a point on a flankand plane perpendicular to the axis of the Screw Thread (applies to parallelthread)(9) Major diameter of external Thread : Diameter of a virtual cylinder which touches the crest ofthe external Thread (10) Minor diameter of internal Thread : Diameter of a virtual cylinder which touches the crest ofthe internal Thread (11) Minor diameter of
Aug 03, 1998 · Tolerance class of thread ridge is primarily determined by dimensions. Table 3 <Tolerance> Screw Thread - 4 External thread Internal thread Second Name Class Types Metric screw thread (M) Group First Second Third 4h 6g 8g 4H, 5H 5H, 6H 7H JIS ISO External thread Unified screw thread (U) 3A 2A 1A 3B 2B 1B JIS ISO JIS ISO Whitworth screw thread ...
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