Value Collection -30579-2 Hex Cap Screw 1/4-20 X 4 in 316 Ss

Product Description

The VALUE COLLECTION -30579-2 is a partially threaded hex head cap screw designed for fastening applications that require corrosion resistance in harsh or wet environments. Manufactured from Grade 316 stainless steel, this fastener offers superior resistance to chlorides and oxidizing agents compared to standard 304-grade hardware. The 1/4-20 UNC thread pattern and 4-inch length under head make it well suited for through-bolting medium-depth assemblies. It ships uncoated, preserving the natural corrosion resistance of the 316 alloy. Plumbers, HVAC technicians, pool service professionals, and marine equipment installers commonly specify 316 stainless fasteners wherever moisture, salt, or chemical exposure is a factor.

This cap screw is appropriate for residential and commercial applications where standard zinc-plated or carbon-steel fasteners are not adequate. Typical use cases include mounting equipment in humid mechanical rooms, securing pool and spa equipment, anchoring outdoor HVAC components, and general corrosive-environment assembly work. The partially threaded shank provides a bearing surface that resists fastener movement under vibration and lateral load, which is advantageous in mechanical and plumbing equipment installations.

Key Features

• Grade 316 stainless steel construction for elevated corrosion resistance in chloride and chemical environments
• 1/4-20 UNC thread standard for broad tool and nut compatibility
• 4-inch length under head accommodates medium-depth through-bolt applications
• Partially threaded shank provides a smooth bearing surface for improved joint stability
• Uncoated finish retains full 316 alloy corrosion properties without plating degradation over time

Compatibility

Designed as a standard 1/4-20 UNC hex head cap screw suitable for use with any standard 1/4-20 nut or tapped hole conforming to Unified National Coarse thread specifications.

Installation Notes

Installation is typically performed by a licensed tradesperson or experienced technician using a standard hex wrench or socket set sized for a 1/4-inch hex head fastener. Always de-energize electrical equipment and shut off fluid systems before working in the vicinity of live components. Do not mix 316 stainless fasteners with dissimilar metals in direct contact without appropriate isolation to prevent galvanic corrosion. Follow applicable mechanical codes and equipment manufacturer guidelines for fastener torque and spacing requirements.