Value Collection 837399PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 837399PR is a hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and trade assembly work. Sized at 1/2-20 UNF with a 1-3/4-inch length under head, this screw is fully threaded and uses a 3/8-inch hex drive socket. Constructed from alloy steel with a zinc-plated finish, it delivers corrosion resistance and the tensile strength needed for demanding bolted connections. It meets ASTM B695 standards for zinc coating. This fastener is installed by mechanical contractors, millwrights, pipefitters, and maintenance technicians working with structural or mechanical assemblies.

This cap screw is suited for use in machinery assembly, equipment maintenance, structural bracketing, and general mechanical fastening where a fine-thread, high-strength screw is required. The 1/2-20 UNF thread pattern is a fine-thread designation, offering better resistance to vibration loosening compared to coarse-thread equivalents. The zinc-plated alloy steel construction makes it appropriate for both indoor and moderate-exposure environments. Sold as a single piece with a minimum order quantity of 10 units per order.

Key Features

• 1/2-20 UNF fine-thread profile resists loosening under vibration
• Fully threaded along the entire 1-3/4-inch length under head
• 3/8-inch hex drive socket for reliable torque application
• Alloy steel construction for high tensile and shear strength
• Zinc-plated finish meets ASTM B695 coating standards
• Single-piece packaging with a minimum order quantity of 10

Compatibility

Designed as a standard 1/2-20 UNF hex socket cap screw for use in any application requiring a fine-thread alloy steel fastener of this thread size and length.

Installation Notes

Installation is typically performed by qualified mechanical or maintenance technicians using a 3/8-inch hex key or socket driver. Always de-energize and lock out equipment before replacing fasteners in mechanical assemblies. Apply appropriate thread-locking compound or torque to specification per the equipment manufacturer's guidelines. Do not mix thread standards — confirm mating threads are UNF before installation.