Self Tapping Screws have their own thread gauge classification. For information on converting self-tapping thread sizes into metric measurements, please consult the table below.

Self Tapping Thread Gauge DiameterThread Diameter (mm)
No. 22.20
No. 42.90
No. 63.50
No. 73.90
No. 84.20
No. 104.80
No. 125.50
No. 146.30
No. 188.00

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