FAQ

Nuts and Washers
Machine Screw
FASTENERS
PRODUCT APPLICATIONS . . .
Also known as stove bolts, machine screws are fully threaded.
US Machine Screw Diameter
USS
SAE
#0 #1 #2 #3 #4 #5 #6 #8 #10 #12 #14
0.06 0.07 0.08 0.09 0.11 0.12 0.13 0.16 0.19 0.21 0.24
1/16 5/64 3/32 7/64 7/64 1/8 9/64 5/32 3/16 7/32 1/4
Size
Decimal
Fractional
Diameter
C
A
B
1/4" 5/16" 3/8" 7/16" 1/2" 9/16"
5/16 3/8 7/16 1/2 9/16 5/8
0.734 7/8 1 1-1/4 1-3/8 1-15/32
0.065 0.083 0.083 0.083 0.109 0.109
#2 #4 #6 #8 #10 #12 1/4" 5/16" 3/8" 7/16" 1/2" 9/16"
3/32 1/8 5/32 3/16 7/32 1/4 9/32 11/32 12/32 15/32 17/32 19/32
1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 13/16 15/16 1-1/16 1-5/32
0.020 0.032 0.049 0.049 0.049 0.065 0.065 0.065 0.065 0.065 0.095 0.095
5/8" 3/4" 7/8" 1" 1-1/8" 1-1/4" 1-3/8" 1-1/2" 1-5/8" 1-3/4" 2"
11/16 13/16 15/16 1-1/16 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2-1/8
1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4 4-1/2
0.134 0.148 0.165 0.165 0.165 0.165 0.180 0.180 0.180 0.180 0.213
5/8" 3/4" 7/8" 1"
21/32 13/16 15/16 1-1/16
1-5/16 1-15/16 1-3/4 2
0.095 0.134 0.134 0.134
Size
Inside Diameter (A)
Outside Diameter (B)
Thickness (C)
Size
Inside Diameter (A)
Outside Diameter (B)
Thickness (C)
Size
Inside Diameter (A)
Outside Diameter (B)
Thickness (C)
Size
Inside Diameter (A)
Outside Diameter (B)
Thickness (C)
USS & SAE Washer Dimensions