#8 Flat Washer (5)
Regular price $ 0.35 USD
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#6 Flat Washer (5)
The washer size to be used with a particular screw size is determined by the first number in the screw size.
For example, a 4-40 machine screw and a #4 sheet metal have about the same major thread diameter and require a #4 washer, flat or lock.