Value Collection -30579-1 Hex Head Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION -30579-1 is a partially threaded hex head cap screw designed for general mechanical and structural fastening applications. It features a 1/4-20 UNC thread form and measures 3-1/2 inches in length under the head. Constructed from Grade 316 stainless steel with no surface coating applied, this fastener provides solid corrosion resistance in wet, marine, or chemically exposed environments. The 7/16-inch hex drive head is compatible with standard hex wrenches and sockets. This screw is suited for use by mechanical contractors, millwrights, HVAC technicians, plumbers, and general tradespeople who need a reliable stainless fastener for light-duty to medium-duty assemblies.

This hex head cap screw is appropriate for residential and commercial mechanical installations where corrosion resistance is a priority. Common applications include equipment mounting, pipe support hardware, panel attachment, and general structural assembly in corrosive or outdoor environments. The partial thread engagement allows for stronger clamping force between joined materials compared to fully threaded fasteners of the same length. Sold individually per package with a minimum order quantity of 50 pieces.

Key Features

• Grade 316 stainless steel construction for superior corrosion resistance
• 1/4-20 UNC thread form for compatibility with standard nuts and tapped holes
• 3-1/2 inches length under head with partial threading for improved clamping
• 7/16-inch hex head drive accepts standard wrenches and sockets
• Uncoated finish — no additional treatment that could interfere with electrical or chemical environments

Compatibility

Designed as a standard 1/4-20 UNC hex head cap screw suitable for use with any application requiring that thread pitch and a 3-1/2-inch grip length in Grade 316 stainless steel.

Installation Notes

Installation is performed by hand-threading the fastener into a pre-tapped 1/4-20 UNC hole or through-hole with a matching nut, then tightening with a 7/16-inch wrench or socket. Power down or depressurize any equipment before fastener replacement on live mechanical systems. Follow applicable torque guidelines for the joined material type as specified by the equipment manufacturer or governing mechanical codes.