Value Collection -30589-3 Hex Cap Screw 5/16-18 316 Ss

Product Description

The VALUE COLLECTION -30589-3 is a hex head cap screw designed for fastening applications that demand corrosion resistance. Sized at 5/16-18 UNC thread with a 3.5-inch length under head, this fastener is partially threaded and left uncoated. The base material is Grade 316 stainless steel, which provides superior resistance to chlorides, salt water, and chemical environments compared to standard 304-grade hardware. Licensed tradespeople and maintenance professionals use this screw wherever a reliable, corrosion-resistant hex fastener is required.

This screw is suited for use in marine, coastal, chemical processing, food service, and outdoor structural applications where moisture or corrosive agents are present. The UNC thread form and inch-system sizing make it compatible with standard SAE-spec fastener layouts. Partially threaded shanks are common in applications requiring a smooth bearing surface or precise clamping length control. This fastener is sold individually with a minimum order quantity of 50 pieces.

Key Features

• Grade 316 stainless steel construction for high corrosion resistance
• 5/16-18 UNC thread form, inch measurement system
• 3.5-inch length under head with partial threading
• Uncoated finish — no added plating or treatment that could alter dimensions
• Hex drive head for use with standard hex wrenches and sockets

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/16-18 UNC partially threaded fastener in Grade 316 stainless steel.

Installation Notes

Installation is typically performed by a qualified mechanic, plumber, or maintenance technician using a standard hex socket or open-end wrench sized for a 5/16-inch hex head. Always de-energize, depressurize, or otherwise isolate the assembly before replacing structural fasteners. Apply an appropriate anti-seize compound when installing stainless steel fasteners into stainless steel tapped holes to prevent galling. Follow applicable mechanical or structural codes for torque and fastener-pattern requirements.