规格(in) 3/32 1/8 5/32 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1
基本尺寸 每英寸牙数 50 50 50 50 50 60 60 60 70 75 80 90 95 100 L(mm) 20 20 20 20 20 25 25 25 30 35 35 40 40 45 l(mm) d(mm) 55° 55° 55° 55° 55° 55° 55° 55° 55° 55° 55° 55° 55° 55° 2.381 3.175 3.969 4.763 6.350 7.938 9.525 11.113 12.700 14.288 15.875 19.050 22.225 25.400 48 40 32 24 20 18 16 14 12 12 11 10 9 8