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- External hex
- 5-1/2"
- Steel
- Zinc
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US Fasteners, External hex, 5-1/2", Zinc plated steel
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Hex bolts
Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.
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Lag bolts
Large wood screws technically called lag screws.