単位(mm)
規 格 NOM. Z X ねじの呼び
TF 3/8 21.5 20 Rc3/8
JCDA 1/2 30 19 Rc1/2
3/4 40 23 Rc3/4
3/4×1/2 32 19 Rc1/2
1 50 29 Rc1


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