US Fasteners, 1/2", Zinc plated steel, 24

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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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  Flange bolts

  Flange bolts have a flange on the bottom of the head that distributes the load like a washer.

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  Machine screws

  Screws with machine threads for use with a nut or in a tapped hole.

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  Carriage bolts & Plow bolts

  Bolts with no drive and machine threads for use with a nut.

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  Sex bolts & Mating screws

  Sex bolts resemble machine screws, but with internal threads, and can be used with either specialized mating screws or standard machine screws. Also known as barrel nuts and Chicago bolts.

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  Thumb screws

  Provides a grip for where hand loosening or tightening is needed. Commonly used in applications such as access panels and where frequent adjustment is required.