Specifications

 

Washer/Screw Size Conversion
Washer Outside Diameter
MM
Fraction
Decimal
9.5
3/8
0.375
11
7/16
0.437
12
12mm
0.465
13
1/2
0.500
14
9/16
0.562
15
19/32
0.593
16
5/8
0.625
18
23/32
0.720
19
3/4
0.750
22
7/8
0.875
25
1
1.000
29
1-1/8
1.125
32
1-1/4
1.250
38
1-1/2
1.500
Washer/Screw Size Conversion
Washer Inside Diameter
Screw Size
Decimal
MM
8
0.200
5.08
10
0.218
5.54
10/12
0.230
5.84
12
0.240
6.10
12/14
0.260
6.60
14
0.275
6.99
17
0.330
8.38
5/16
0.343
8.71
11/32
0.375
9.53
3/8
0.413
10.49
7/16
0.484
12.29
1/2
0.562
14.27