Value Collection 581506PS Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 581506PS is a hex socket cap screw designed for high-strength fastening in mechanical, industrial, and structural assemblies. It features a 3/8-24 UNF thread — a fine-pitch unified thread well-suited to applications requiring precise clamping force and resistance to vibration loosening. The screw measures 6 inches in length under the head and is partially threaded, allowing the unthreaded shank to bear shear loads in clearance-hole applications. Driving is done with a 5/16-inch hex key. The alloy steel construction with a black oxide coating provides baseline corrosion resistance and reduces surface reflectivity. Licensed tradespeople, maintenance technicians, and machinists install this type of fastener across a wide range of equipment and fabrication work.

This cap screw is appropriate for use in precision mechanical assemblies, machine frames, tooling fixtures, and equipment maintenance where a fine-thread socket head fastener is specified. The 3/8-24 UNF thread pitch is commonly found in applications demanding tighter thread engagement than coarse-pitch alternatives allow, such as thin-walled components or vibration-prone environments. The 6-inch under-head length accommodates thicker or stacked material assemblies. Sold individually per package with a minimum order quantity of 10 units.

Key Features

• 3/8-24 UNF fine-pitch thread for tight clamping and vibration resistance
• 6-inch length under head suits thick or multi-layer material stacks
• Partially threaded shank handles shear load in clearance-hole applications
• 5/16-inch hex drive for standard hex key or socket installation
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish provides mild corrosion resistance and low surface reflectivity

Compatibility

Designed as a standard replacement or service fastener for any assembly specifying a 3/8-24 UNF partially threaded hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574.

Installation Notes

Installation is performed with a 5/16-inch hex key or matching socket driver. Always verify thread condition in the tapped hole before installation and use appropriate thread lubricant or anti-seize compound where specified by the equipment manufacturer. Ensure the mating material is rated for the clamping loads produced by an alloy steel fastener at the intended torque. Follow all applicable mechanical codes and equipment service documentation when replacing structural or load-bearing fasteners.