Value Collection -36817-1 Flat Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION -36817-1 is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Sized at 1/4-20 UNC thread by 1-3/4 inches overall length and fully threaded, this screw features an 82-degree flat head driven by a 5/32-inch hex socket. The body is machined from alloy steel and finished in black oxide for moderate corrosion resistance and reduced light reflection. It meets ASME/ANSI B18.3 and ASTM F835 fastener standards. Machinists, millwrights, and maintenance technicians commonly use this fastener where a protruding head would interfere with mating surfaces or moving parts.

This flat socket cap screw is suited for general industrial assembly, machine guarding, fixture building, and equipment maintenance in both shop and field environments. The 1/4-20 UNC thread is one of the most widely used coarse-thread sizes in inch-standard mechanical assemblies, making this screw a common stock item across manufacturing, fabrication, and maintenance operations. The black oxide finish provides a clean appearance and light surface protection in dry or low-moisture environments.

Key Features

• 82-degree flat head seats flush in standard countersunk holes for a low-profile installation
• 5/32-inch hex socket drive for precise torque application with standard Allen keys or hex bit drivers
• Fully threaded along the 1-3/4-inch overall length for maximum thread engagement in thinner materials
• Alloy steel construction provides higher tensile strength than standard steel fasteners
• Black oxide finish reduces glare and offers light surface corrosion resistance in dry service conditions
• Conforms to ASME/ANSI B18.3 and ASTM F835 dimensional and mechanical standards

Compatibility

Designed for use in standard 1/4-20 UNC tapped holes or clearance-drilled and countersunk assemblies using the inch system of measurement. Compatible with 82-degree countersink angles standard to inch-series flat head fastener applications.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 5/32-inch hex key or socket bit. Ensure the mating countersink is machined to an 82-degree included angle for proper head seating. De-energize or lock out equipment before fastener installation or removal per applicable OSHA lockout/tagout procedures. Do not over-torque alloy steel screws in soft or tapped aluminum substrates without referencing the assembly torque specification.