Value Collection 36857 Flat Socket Cap Screw 1/2-13 X 1-3/4 in

Product Description

The Value Collection 36857 is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head with a 5/16-inch hex socket drive and is fully threaded along its 1-3/4-inch overall length. The 1/2-13 UNC thread pattern provides strong thread engagement in standard inch-system tapped holes. Constructed from alloy steel with a black oxide finish, it offers solid mechanical strength and moderate corrosion resistance in controlled environments. Machinists, millwrights, and maintenance technicians commonly install this fastener in machinery, tooling fixtures, and structural assemblies where a low-profile head is required.

This flat socket cap screw is suited for residential and commercial maintenance, machine shop work, and industrial equipment assembly. The 82-degree countersunk head seats flush with or below the mating surface, making it appropriate for tight-clearance installations and high-cycle assemblies where protruding fastener heads are not acceptable. The hex socket drive allows installation with a standard Allen key or hex bit driver in confined spaces. This item is sold in a package quantity of 10 per order.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 5/16-inch hex socket drive for use with Allen keys or hex bit drivers
• 1/2-13 UNC fully threaded for maximum thread engagement
• Alloy steel construction for high tensile strength
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed for use in standard 1/2-13 UNC tapped holes in inch-system applications. The 82-degree countersunk head is compatible with standard flat-head countersink profiles per ASME/ANSI B18.3.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated torque wrench and a 5/16-inch hex key or socket bit. Ensure the mating countersink is machined to an 82-degree included angle to achieve proper head seating. De-energize or lock out any equipment before fastener service per applicable OSHA lockout/tagout procedures. Do not over-torque; consult the applicable fastener torque specification for Grade alloy steel at 1/2-13 UNC from ASME or equipment manufacturer documentation.