Value Collection 307212BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 307212BR is a hex socket cap screw designed for high-strength fastening in mechanical assemblies, fabrication, and maintenance applications. It features a 7/8-9 UNC thread, a 3-inch length under head, and is driven with a 9/16-inch hex key. The screw is manufactured from alloy steel and finished with a black oxide coating, which provides mild corrosion resistance and reduces light reflection. It is partially threaded, following ASTM A574 standard for alloy steel socket cap screws. This fastener is appropriate for use by machinists, millwrights, maintenance technicians, and general industrial tradespeople requiring reliable clamping force in bolted connections.

This screw is suited for use in industrial equipment assembly, machinery frames, tooling fixtures, and structural mechanical joints where a recessed hex drive is preferred over external-drive fasteners. The partially threaded shank allows for precise clamping across joint interfaces. Its alloy steel construction and black oxide finish make it a common choice in shop-floor and field maintenance environments where strength and a clean appearance are both priorities.

Key Features

• 7/8-9 UNC thread form for standard inch-series fastener compatibility
• 3-inch length under head with partial threading for controlled clamping
• 9/16-inch hex socket drive for internal hex key or socket installation
• Alloy steel construction meets ASTM A574 standard for high-strength socket cap screws
• Black oxide finish provides mild corrosion resistance and low-glare appearance

Compatibility

Designed as an OEM-style replacement or standard-fit hex socket cap screw for any application requiring a 7/8-9 UNC partially threaded alloy steel fastener conforming to ASTM A574.

Installation Notes

Installation is performed using a 9/16-inch hex key or Allen-style socket driver. Ensure mating threads are clean and free of debris before installation. Follow applicable torque specifications from the equipment manufacturer or a recognized fastener torque standard for 7/8-9 alloy steel socket cap screws. Black oxide finish is not a heavy corrosion barrier — use appropriate thread lubricant or sealant when installing in wet or corrosive environments.