Value Collection -30589-4 Hex Cap Screw 5/16-18 X 4 in 316 Ss

Product Description

The VALUE COLLECTION -30589-4 is a partially threaded hex head cap screw designed for general fastening applications where corrosion resistance is critical. Manufactured from Grade 316 stainless steel with a bright uncoated finish, this fastener measures 5/16-18 thread size with a 4-inch length under head and follows the Unified National Coarse (UNC) thread standard. The partial threading provides a smooth shank section that is well suited to applications requiring a clamp load or where the bolt passes through a clearance hole before engaging threads. Plumbers, HVAC technicians, electricians, and mechanical contractors reach for 316 stainless fasteners when working in wet, coastal, or chemically aggressive environments.

This cap screw is appropriate for both residential and commercial installation scenarios where standard carbon steel fasteners would be prone to rust or galvanic corrosion. Typical applications include equipment mounting in mechanical rooms, pipe hanger assemblies, panel mounting near water exposure, and pool or wastewater equipment enclosures. The 316 stainless steel alloy provides superior resistance to chloride environments compared to 304-grade alternatives, making it a common choice for pool and marine-adjacent service work.

Key Features

• Grade 316 stainless steel construction for high corrosion and chloride resistance
• Partially threaded shank for precise clamping and clearance-hole applications
• 5/16-18 UNC thread standard ensures broad tool and nut compatibility
• Bright uncoated finish — no coating to chip, flake, or introduce galvanic incompatibility
• 4-inch length under head accommodates thicker assemblies and stacked components

Compatibility

Designed as a standard 5/16-18 UNC hex head cap screw suitable for use with any 5/16-18 threaded nut or tapped hole conforming to Unified National Coarse thread specifications.

Installation Notes

Installation is appropriate for any trade working with standard hex fasteners using a 1/2-inch wrench or socket. Power down or de-energize any associated equipment before fastening components near electrical enclosures. Do not mix 316 stainless fasteners with carbon steel nuts or washers in highly corrosive environments, as dissimilar metal contact can accelerate galvanic corrosion. Follow applicable codes and equipment manufacturer torque guidance for the specific assembly being secured.