Value Collection 33660 Hex Socket Cap Screw 1/2-13 Unc 25pk

Product Description

The VALUE COLLECTION 33660 is a fully threaded hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and trade assembly work. Sized at 1/2-13 UNC with a 3/4-inch length under head, this screw is driven with a 3/8-inch hex key. It is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. Each package contains 25 screws. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding structural and mechanical assembly applications.

This screw is used wherever a recessed hex drive fastener is specified — common in machine frames, tooling fixtures, equipment enclosures, hydraulic components, and general mechanical assemblies. The 1/2-13 UNC thread is a coarse-thread designation widely used in North American manufacturing and trade work. The black oxide finish is appropriate for indoor or lightly protected environments. Installation is typically performed by millwrights, maintenance technicians, pipefitters, or mechanical contractors working on equipment assembly or field repair.

Key Features

• 1/2-13 UNC coarse thread, fully threaded for maximum thread engagement
• 3/4-inch length under head suits standard through-hole and tapped applications
• 3/8-inch hex drive for use with standard Allen keys or hex socket drivers
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish offers mild corrosion resistance and a clean, low-glare appearance
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard 1/2-13 UNC hex socket cap screw for use in any application requiring an ASME/ANSI B18.3 or ASTM A574 compliant fastener with a 3/8-inch hex drive and 3/4-inch grip length.

Installation Notes

Install using a calibrated torque wrench with a 3/8-inch hex bit to achieve the specified clamp load for the joint material and fastener grade. Ensure mating threads are clean and free of debris before installation. Follow applicable industry standards and equipment manufacturer torque specifications. Alloy steel fasteners in black oxide finish should be inspected regularly in exposed or high-moisture environments where additional corrosion protection may be required.