200以上 1/4-20 unc-2b minor diameter 573893-1/4-20 unc-2b minor diameter
1/4 unc 2500 2175 17 1959 #7 1/428 unf 28 2500 2268 62 2113 #3 5/1618 unc 18 3125 2764 2443 2524 f 5/1624 unf 24 3125 2854 2614 2674 i 3/816 unc 16 3750 3344 29 3073 5/16 3/4 unf 24 3750 3479 3239 3299 q 7/1614 unc 14 4375 3911 3499 3602 u 7/16 unf 4375 4050 3762 34 25/64Thread Size TapDrill Sizes Clearance Holes;Notes a) For Class 2A threads with coating (plating) the max is increased by the allowance, to the basic size This is the same value as Class 3A 1 4 Unc 2b Hss Right Hand Thread Drill Screw Tap Spiral Point Straight Flute Buy At A Low Prices On Joom E Commerce Platform 1/4-20 unc-2b minor diameter