Value Collection 837401PS Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 837401PS is a fully threaded hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, equipment fabrication, and maintenance work. Sized at 1/2-20 UNF with a 2-inch length under head, it uses a 3/8-inch hex drive for installation with a hex key or Allen driver. The fastener is manufactured from alloy steel and finished with a zinc-plated coating that provides basic corrosion resistance in dry and mildly humid environments. It meets ASTM B695 fastener standards. This screw is commonly installed by millwrights, pipefitters, HVAC technicians, electricians, and general mechanical contractors wherever a high-torque, socket-drive cap screw is required.

This cap screw is suited for use in structural joints, equipment frames, motor mounts, brackets, and similar assemblies where a flush or recessed fastener head is preferred. The fine 1/2-20 UNF thread pitch provides tighter thread engagement and greater resistance to loosening under vibration compared to coarse-thread equivalents. It is sold individually but subject to a minimum order quantity of 10 pieces, making it appropriate for both single-repair and small-batch production use.

Key Features

• 1/2-20 UNF fine thread for improved vibration resistance and torque retention
• Fully threaded along the 2-inch shank length under head
• 3/8-inch hex socket drive compatible with standard Allen keys and socket drivers
• Alloy steel construction for high tensile and shear strength
• Zinc-plated finish per ASTM B695 for corrosion protection in general-duty environments

Compatibility

Designed as a standard 1/2-20 UNF hex socket cap screw for use in any application requiring a fully threaded, socket-drive fastener of this thread size and shank length.

Installation Notes

Installation requires a 3/8-inch hex key or Allen-head socket driver; use a calibrated torque wrench when a specified clamp load must be maintained. Ensure mating threads are clean and free of debris before installation. Do not mix with coarse-thread (UNC) tapped holes of the same nominal diameter. Follow applicable mechanical codes and equipment manufacturer torque specifications for the assembly being serviced.