Value Collection 307210BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 307210BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It carries a 7/8-9 UNC thread size and measures 2.75 inches in length under the head. Driven with a 9/16-inch hex key, this fastener is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces surface reflectivity. It meets ASTM A574 specifications, which define the mechanical property requirements for socket head cap screws. Machinists, millwrights, and maintenance technicians commonly install this type of fastener where high clamp load and a low-profile head are required.

This fastener is suited for use in machinery frames, jigs and fixtures, tooling plates, and heavy equipment assemblies where a recessed drive style is preferred over hex flange or external hex configurations. The partial threading allows for shank engagement in clearance holes, making it appropriate for through-bolted joints and applications requiring precise shear load transfer. It is sold individually and is appropriate for both OEM assembly and field maintenance work.

Key Features

• 7/8-9 UNC thread for compatibility with standard unified coarse-thread nuts and tapped holes
• 2.75-inch length under head with partial threading for shank-to-clearance-hole engagement
• Alloy steel construction provides high tensile and proof load per ASTM A574
• Black oxide finish offers mild corrosion resistance and low surface glare
• 9/16-inch hex drive accepts standard hex keys and socket tooling
• ASTM A574 compliant for socket head cap screw mechanical requirements

Compatibility

Designed for use in standard 7/8-9 UNC tapped holes or with matching nuts per unified coarse-thread specifications. Suitable as an OEM-style replacement or service fastener in mechanical and industrial assemblies requiring ASTM A574 socket head cap screws.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated torque wrench and a 9/16-inch hex key or socket. De-energize and lock out all equipment before servicing any fastened assembly. Inspect mating threads for damage or contamination prior to installation and apply thread lubricant or thread-locking compound only as specified by the equipment manufacturer. Torque values should be referenced from the equipment OEM documentation or applicable engineering standards, as no torque specification was provided with this product.