螺纹底孔直径参考——arbideM24*—M24*—M25*—M25*—M25*—M26*—M27*—M27*—M27*—M28*—M28*—M28*—M30*—M30*—M30*—M30*—M32*—M32*—M33*—M33*—M33*—M35*—M36*—M36*—M36*—M38*—M39*—M39*—M39*—M40*—M40*—M40*—M42*—M42*—M42*—M42*—M45*—M45*—M45*—M45*—M48*—M48*—M48*—M48*—M50*—M50*—M50*——-—-—-—-—-—-—-—-—-—1/4-—5/16-—3/8-—7/16-—1/2-—9/16-12UNC1220—5/8-—3
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