Value Collection 581680PR Hex Socket Cap Screw 1-12 Unf

Product Description

The VALUE COLLECTION 581680PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling fixtures, and industrial equipment. This fastener features a 1-12 UNF thread form and a 3/4-inch hex drive socket, accepting a standard hex key or Allen driver. The screw is fully threaded along its 3-inch length under the head, providing consistent thread engagement across the full grip range. Constructed from alloy steel with a black oxide finish, it delivers solid tensile strength and moderate corrosion resistance. It meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards. Machinists, millwrights, and maintenance technicians regularly specify this fastener for precision clamping and structural assembly work.

This cap screw is suited for use in heavy mechanical assemblies where a recessed hex drive is required for flush or below-surface installation. The 1-12 UNF thread pitch is a fine-thread designation, offering improved torque retention and reduced loosening under vibration compared to coarse-thread equivalents. Typical applications include machine tool components, hydraulic fixtures, and industrial equipment frames where fine-thread fasteners are specified by design. The 3-inch length under head accommodates moderate-depth clamping configurations.

Key Features

• 1-12 UNF fine thread for improved vibration resistance and precise torque control
• Fully threaded 3-inch length under head for maximum thread engagement across the grip
• 3/4-inch hex socket drive accepts standard hex keys and Allen wrenches
• Alloy steel construction meeting ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and reduces surface reflectivity
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application specifying a 1-12 UNF fully threaded fastener with a 3/4-inch hex drive.

Installation Notes

Installation requires a 3/4-inch hex key or Allen driver capable of handling the torque demands of an alloy steel cap screw at this thread size. De-energize, depressurize, or lock out any equipment before replacing or tightening fasteners in live assemblies. Follow applicable torque specifications from the equipment manufacturer or the relevant ASME fastener standard for alloy steel socket cap screws. Inspect threads in the receiving hole for damage or contamination before installation to ensure full thread engagement.