Value Collection 581552PR Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 581552PR is a hex socket cap screw designed for high-strength fastening applications across mechanical, structural, and industrial assembly work. This fastener features a 1/2-13 UNC thread size with a 4.75 inch length under head and is partially threaded, allowing for controlled clamping force in bolted joints. Made from alloy steel with a black oxide coating, it provides enhanced corrosion resistance compared to bare steel. The 3/8 inch hex drive socket accepts standard hex keys and bit drivers. Installation is typically performed by machinists, maintenance technicians, and mechanical contractors.

This cap screw is suited for use in general industrial machinery, equipment assembly, fabrication, and maintenance applications requiring a strong, reliable fastener. The partially threaded shank provides a smooth bearing surface in the grip area, which is important when fastening through clearance holes or when shear load is a design consideration. The black oxide finish blends well in applications where appearance matters alongside performance.

Key Features

• Alloy steel construction for high tensile strength in demanding fastening applications
• Black oxide coating provides moderate corrosion resistance and reduces light reflection
• 1/2-13 UNC thread form for broad compatibility with standard inch-series tapped holes
• Partially threaded shank preserves a smooth grip section for improved shear load handling
• 3/8 inch hex drive size fits widely available hex keys and socket drive tools
• Meets ASME/ANSI B18.3 and ASTM A574 standards for socket head cap screws

Compatibility

Designed as a standard-duty socket head cap screw compatible with any 1/2-13 UNC tapped hole in equipment, fixtures, or assemblies requiring an alloy steel fastener per ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation should be performed using a properly sized 3/8 inch hex key or socket drive to avoid rounding the drive recess. Ensure mating threads are clean and free of debris before driving the fastener. Apply a thread lubricant or anti-seize compound when specified by the equipment manufacturer to achieve accurate clamp load. Always follow applicable mechanical standards and equipment service documentation when specifying fastener torque values.