STANDARD

USA Hole Φ Outside Φ Thickness Hole Φ Outside Φ Thickness Hole Φ Outside Φ Thickness Hole Φ Outside Φ Thickness Hole Φ Outside Φ Thickness

No.0  0.0680  0.1250  0.0250 0.0680  0.1880  0.0250  0.0680  0.2500  0.0250

No.1  0.0840  0.1560  0.0250  0.0840  0.2190  0.0250  0.0840  0.2810  0.0320

No.2  0.0940  0.1880  0.0250  0.0940  0.2500  0.0320  0.0940  0.3440  0.0320

No.3  0.1090  0.2190  0.0250  0.1090  0.3120  0.0320  0.1090  0.4060  0.0400

No.4  0.1250  0.2500  0.0320  0.1250  0.3750  0.0400  0.1250 0.4380 0.0400

No.5  0.1410  0.2810  0.0320  0.1410  0.4060  0.0400  0.1410  0.5000  0.0400

No.6 0.156 0.375 0.049  0.1560  0.3120  0.0320  0.1560  0.4380  0.0400  0.1560  0.5620  0.0400

No.8 0.188 0.438 0.049  0.1880  0.3750  0.0400  0.1880  0.5000  0.0400  0.1880  0.6250  0.0630

No.10 0.219 0.500 0.049  0.2030  0.4060  0.0400  0.2030  0.5620  0.0400  0.2030  0.7340  0.0630

No.12 0.250 0.562 0.065  0.2340  0.4380  0.0400  0.2340  0.6250  0.0630  0.2340  0.8750  0.0630

1/4" 0.281 0.625 0.065  0.2810  0.5000  0.0630  0.2810  0.7340  0.0630  0.2810  1.0000  0.0630

5/16" 0.344 0.688 0.065  0.3440  0.6250  0.0630  0.3440  0.8750  0.0630  0.3440  1.1250  0.0630

3/8" 0.406 0.812 0.065  0.4060  0.7340  0.0630  0.4060  1.0000  0.0630  0.4060  1.2500  0.1000

7/16" 0.469 0.922 0.065  0.4690  0.8750  0.0630  0.4690  1.1250  0.0630  0.4690  1.4690  0.1000

1/2" 0.531 1.062 0.095  0.5310  1.0000  0.0630  0.5310  1.2500  0.1000  0.5310  1.7500  0.1000 0.5625 2.0000 0.2500

9/16" 0.594 1.156 0.095  0.5940  1.1250  0.0630  0.5940  1.4690  0.1000  0.5940  2.0000  0.1000

5/8" 0.656 1.312 0.095  0.6560  1.2500  0.1000  0.6560  1.7500  0.1000  0.6560  2.2500  0.1600 0.6875 3.0000 0.2500

3/4" 0.812 1.469 0.134  0.8120  1.3750  0.1000  0.8120  2.0000  0.1000  0.8120  2.5000  0.1600 0.8125 3.0000 0.2500

7/8" 0.938 1.750 0.134  0.9380  1.4690  0.1000  0.9380  2.2500  0.1600  0.9380  2.7500  0.1600 0.9375 3.0000 0.2500

1" 1.062 2.000 0.134  1.0620  1.7500  0.1000  1.0620  2.5000  0.1600  1.0620  3.0000  0.1600 1.0625 3.2500 0.2500

1-1/8" 1.250 2.250 0.165  1.1880  2.0000  0.1000  1.1880  2.7500  0.1600  1.1880  3.2500  0.1600 1.3750 4.0000 0.5000

1-1/4" 1.250 2.250 0.165  1.1880  2.0000  0.1000  1.1880  2.7500  0.1600  1.1880  3.2500  0.1600 1.3750 4.0000 0.5000

1-3/8" 1.500 2.750 0.165  1.4380  2.5000  0.1600  1.4380  3.2500  0.1600  1.4380  3.7500  0.2500

1-1/2" 1.625 3.000 0.165  1.5620  2.7500  0.1600  1.5620  3.5000  0.2500  1.5620  4.0000  0.2500

1-5/8" 1.750 3.750 0.180  1.7500  3.0000  0.1600  1.7500  3.7500  0.2500  1.7500  4.2500  0.2500

1-3/4" 1.875 4.000 0.180  1.8750  3.2500  0.1600  1.8750  4.0000  0.2500  1.8750  4.5000  0.2500

1-7/8" 2.000 4.250 0.180  2.0000  3.5000  0.2500  2.0000  4.2500  0.2500  2.0000  4.7500  0.2500

2" 2.125 4.500 0.180  2.1250  3.7500  0.2500  2.1250  4.5000  0.2500  2.1250  5.0000  0.2500

2 1/4" 2.375 4.750 0.220  2.3750  4.0000  0.2500  2.3750  5.0000  0.2500  2.3750  5.5000  0.3750

2 1/2" 2.625 5.000 0.238  2.6250  4.5000 0.2500  2.6250  5.5000  0.3750  2.6250  6.0000  0.3750

2 3/4" 2.875 5.250 0.259 2.8750  5.0000  0.2500  2.8750  6.0000  0.3750  2.8750  6.5000  0.3750

3" 3.125 5.500 0.284  3.1250  5.5000  0.3750 3.1250  6.5000  0.3750  3.1250  7.0000 0.3750

TYPE A NARROW TYPE B NARROW TYPE B REGULAR TYPE B WIDE DOCK WASHER ANSI B18.22.1