Hillman Fasteners 220116 Grade 8 Hex Cap Screw 3/8x3/4

Product Description

The HILLMAN FASTENERS 220116 is a Grade 8 hex cap screw with a 3/8-16 coarse thread and a 3/4-inch length, finished in yellow zinc. Grade 8 hardware carries a minimum tensile strength significantly higher than standard zinc-plated fasteners, making this screw suitable for high-stress structural and mechanical connections. The yellow zinc coating provides corrosion resistance for indoor and light outdoor applications. Tradespeople and mechanical contractors reach for Grade 8 fasteners when joint integrity under load is a primary concern.

This hex cap screw is used across a broad range of trade applications including HVAC equipment mounting, light structural steel connections, machinery assembly, and general mechanical work where a coarse-thread 3/8-inch fastener is specified. The 3/4-inch grip length suits shallow-clearance assemblies and standard bracket or flange connections. Sold individually, it is a direct replacement or supplemental fastener wherever a 3/8-16 x 3/4-inch Grade 8 coarse-thread hex cap screw is called out on a spec sheet or equipment drawing.

Key Features

• Grade 8 tensile rating for high-load structural and mechanical fastening
• 3/8-16 coarse thread (UNC) for fast engagement and reliable clamping force
• 3/4-inch length suits shallow flange, bracket, and equipment-mounting applications
• Yellow zinc finish provides corrosion resistance in light-duty environments
• Hex head accepts standard 9/16-inch hex wrench or socket

Compatibility

Designed as a standard 3/8-16 x 3/4-inch Grade 8 coarse-thread hex cap screw suitable for any application specifying UNC Grade 8 fasteners of this size.

Installation Notes

Installation is performed by any qualified mechanic or tradesperson using a 9/16-inch socket or combination wrench. Always confirm the mating material and thread engagement depth meet the requirements of the joint before final torque. Follow the applicable fastener torque specifications for Grade 8 hardware provided by the equipment manufacturer or governing standard. Inspect threads for damage before installation and do not reuse fasteners that show signs of galling or deformation.