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Wrench Driver Fastener Table


This quick reference takes the guess work:
match the size wrench or driver to standard fastener sizes.

Corresponding sizes
Socket Cap or Set ScrewAllen Wrench
25/64
43/32
67/64
89/64
105/32
1/43/16
5/161/4
3/85/16
 
Corresponding sizes
Square Drive FastenerSquare Drive Bit
4R0
6R1
8R2
10R2
12R2
14R3
Corresponding sizes
Hex Bolts & NutsWrench
41/4
65/16
811/32
103/8
127/16
1/47/16
5/161/2
3/89/16
1/23/4
9/167/16
5/815/16
3/41-1/8
7/81-5/16
11-1/2
1-1/81-5/8
 
Corresponding sizes
Frearson Drive FastenerFrearson Drive Bit
0-61
8-162

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