Value Collection R57001086 Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION R57001086 is a hex socket cap screw designed for fastening applications that demand corrosion resistance and precise thread engagement. It features a 1/2-20 UNF thread size, a 5-inch length under head, and a 3/8-inch hex drive socket. Manufactured from 18-8 stainless steel with a bright, uncoated finish, this screw delivers reliable performance in environments where oxidation resistance is critical. It is a standard fastener used by mechanical contractors, millwrights, equipment assemblers, and maintenance technicians working on industrial, commercial, or marine-adjacent equipment.

This cap screw suits applications requiring fine-thread engagement on 1/2-inch fastener clearances, such as machinery assemblies, structural bracketing, and equipment frames where vibration resistance and material compatibility with stainless are required. The 5-inch under-head length accommodates deeper material stacks. It is sold individually with a minimum order quantity of 5 pieces.

Key Features

• 1/2-20 UNF fine thread for strong thread engagement and vibration resistance
• 5-inch length under head accommodates deeper material stacks
• 3/8-inch hex drive socket for standard Allen key or hex bit installation
• 18-8 stainless steel construction provides corrosion and oxidation resistance
• Bright, uncoated finish — no surface treatment to interfere with torque values or material compatibility
• Conforms to UNSPSC code 31161501 for industrial fastener classification

Compatibility

Designed as an OEM-style replacement or general-use hex socket cap screw suitable for machinery, equipment assemblies, and structural applications requiring a 1/2-20 UNF fine-thread fastener with a 3/8-inch hex drive.

Installation Notes

Installation is performed using a 3/8-inch hex key or hex bit driver. Power down or de-energize any associated equipment before fastener installation or removal. Follow applicable ASME or equipment manufacturer torque guidelines for 1/2-20 UNF stainless fasteners, as 18-8 stainless is susceptible to galling — apply an appropriate anti-seize compound if specified by the equipment manufacturer. Inspect threads on both the screw and receiving material before assembly.