Value Collection 581966BR Hex Socket Cap Screw 1-1/2-12 Unf

Product Description

The VALUE COLLECTION 581966BR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling, fixtures, and industrial equipment. The screw features a 1-1/2-12 UNF thread and measures 4.5 inches under the head with full threading along the entire shank. Drive engagement is accomplished with a 1-inch hex socket drive. Constructed from alloy steel and finished with a black oxide coating, this fastener delivers solid tensile strength and basic corrosion resistance for demanding shop and field applications. It is installed by licensed mechanics, machinists, and maintenance professionals.

This cap screw is suited for use in industrial machinery, precision fixtures, hydraulic equipment, and structural assemblies where a fine-thread UNF pattern is required. The 1-1/2-12 UNF thread pitch provides tighter clamping force and greater resistance to vibration loosening compared to coarse-thread equivalents, making it a common choice in applications subject to dynamic loading. The black oxide finish is appropriate for interior or protected environments where surface appearance and light corrosion inhibition are needed.

Key Features

• 1-1/2-12 UNF fine thread for high clamping force and vibration resistance
• Fully threaded shank along the entire 4.5-inch length under head
• 1-inch hex socket drive compatible with standard socket tooling
• Alloy steel construction for high tensile and shear strength
• Black oxide finish provides a matte surface and light corrosion inhibition
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for applications requiring a 1-1/2-12 UNF hex socket cap screw per ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 1-inch hex key or socket driver. Always de-energize and lock out any powered equipment before servicing fastened assemblies. Verify thread engagement and mating thread condition before torquing. Do not substitute a coarse-thread fastener in a UNF-tapped hole, as thread mismatch will result in fastener failure.