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Hexagon head designed to be driven by a wrench or socket
Also called hex cap bolts, hex bolts, tap bolts or hex cap screws
18-8 Stainless steel hex cap screws offer protection from weather and corrosive environments
Rust resistant in freshwater environments
For saltwater environments use the 316 stainless steel version
A hex cap screw in smaller sizes may not have a shoulder. When a hex cap screw is fully threaded it can also be referred to as a tap bolt.
Hex Bolts are measured as: Diameter x Thread Pitch x Length from Under Head FT: Fully Threaded PT: Partially Threaded
**1/4"-20 Hex Cap Screws listed as PT, usually have a threaded portion of about 3/4". However, this can vary slightly from manufacturer to manufacturer.