Value Collection 581681PR Hex Socket Cap Screw 1-12 Unf

Product Description

The VALUE COLLECTION 581681PR is a hex socket cap screw designed for high-strength fastening in industrial and mechanical assemblies. With a 1-12 UNF thread and a 3/4-inch hex drive, this cap screw delivers the torque capacity and thread engagement needed for demanding applications. The 3.5-inch length under head suits installations requiring deeper grip in structural or machine components. Made from alloy steel with a black oxide finish, it provides reliable corrosion resistance in moderate environments. Licensed trades and maintenance professionals specify this fastener type for machinery, fixtures, and equipment where a clean, recessed drive is required.

This screw is suited for use in industrial machinery, fabricated steel structures, jigs, fixtures, and mechanical assemblies where a partially threaded, high-strength cap screw is the correct specification. The 1-12 UNF thread pitch indicates a fine-thread application, typically used where vibration resistance or precise thread engagement in thin or hardened material is a priority. Installation is performed by maintenance technicians, millwrights, or mechanical contractors working to ASME and ASTM fastener standards.

Key Features

• 1-12 UNF fine thread for precise engagement and vibration resistance
• 3/4-inch hex socket drive accommodates standard hex keys and socket drivers
• 3.5-inch length under head for deeper fastening reach in structural applications
• Partially threaded shank provides shear strength and alignment in bolted joints
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish offers moderate corrosion resistance and reduces light reflection

Compatibility

Designed as an OEM-style replacement or direct specification fastener for industrial machinery and mechanical assemblies requiring a 1-12 UNF hex socket cap screw per ASME/ANSI B18.3 and ASTM A574 standards.

Installation Notes

Installation is typically performed by millwrights, mechanical technicians, or industrial maintenance professionals. Ensure mating threads are clean and free of debris before installation. Use a calibrated torque wrench with the correct 3/4-inch hex bit to achieve the specified clamp load for this thread size and material grade. Do not mix UNF and UNC fasteners in the same tapped hole, as thread form incompatibility will cause damage.