JIS thread plug gauges PF1/8 PF1/4 PF3/8 PF1/2 PF3/4 PF 1 1/4, PF2 inch screw plug gauge GO NO GO gauge

JIS thread plug gauges PF1/8 PF1/4 PF3/8 PF1/2 PF3/4 PF 1 1/4, PF2 inch screw plug gauge GO NO GO gauge

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