Value Collection 592409PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 592409PR is a hex socket cap screw designed for high-strength fastening in precision mechanical assemblies. It features a 1/2-20 UNF thread size and a 2-inch length under head, with full threading along the shank. The drive is a 3/8-inch hex socket, requiring a standard Allen or hex key driver. Constructed from 18-8 austenitic stainless steel (Grade A2) with a bright, uncoated finish, this fastener resists corrosion in wet or chemically active environments. It meets ASME/ANSI B18.3 and ASTM F837 standards, making it suitable for applications requiring traceable fastener specifications.

This screw is used in mechanical, industrial, and maintenance applications where a recessed-drive cap screw is preferred for clearance or torque control. Fully threaded construction allows engagement along the entire shank length, which is useful in thin-material or close-tolerance assemblies. Typical installers include millwrights, maintenance mechanics, and field technicians working on equipment frames, pump housings, bracket assemblies, and similar structural connections requiring corrosion-resistant hardware.

Key Features

• Thread size 1/2-20 UNF with full threading along shank
• 2-inch length under head for through-bolt and tapped-hole applications
• 3/8-inch hex socket drive for standard Allen key or hex driver
• 18-8 austenitic stainless steel, Grade A2 for corrosion resistance
• Bright uncoated finish — no coating thickness to account for in tight-tolerance fits
• Meets ASME/ANSI B18.3 and ASTM F837 fastener standards

Compatibility

Designed as an OEM-style replacement or aftermarket hex socket cap screw for tapped holes or nuts with 1/2-20 UNF internal threads in mechanical and industrial equipment assemblies.

Installation Notes

Installation requires a 3/8-inch hex key or socket driver; apply fastener torque according to the equipment manufacturer's specifications for 1/2-20 stainless steel hardware. Avoid over-torquing stainless steel fasteners, as galling can occur — application of anti-seize compound is a common field practice to prevent thread seizure. Verify tapped-hole thread class and depth before installation to ensure full engagement. Always de-energize or lock out equipment before accessing fastener locations on powered machinery.