Value Collection 99200 Hex Head Cap Screw 7/8-9 X 4 in Grade 8

Product Description

The VALUE COLLECTION 99200 is a hex head cap screw sized at 7/8-9 thread by 4 inches under the head, manufactured from Grade 8 steel with an uncoated finish. Grade 8 is the highest common SAE fastener grade, offering tensile strength suitable for heavy structural, mechanical, and industrial applications. The screw features partial threading along the shank, which provides a smooth bearing surface between mating parts and resists lateral shear loads better than a fully threaded fastener. It conforms to ASME B18.2.1 and SAE J429, the governing standards for inch-series hex head screws and mechanical property requirements. This fastener is installed by maintenance technicians, millwrights, mechanical contractors, and heavy equipment service professionals.

This screw is used in applications requiring high-strength fastening under significant load or vibration, including heavy equipment assemblies, structural steel connections, machinery mounts, and industrial fabrication. The 7/8-9 UNC thread is a coarse-thread designation common in structural and general mechanical applications where rapid assembly and resistance to cross-threading are priorities. The partial thread shank suits through-bolt configurations where precise shank-to-hole fit matters. Sold in packages of 25, this fastener suits job-lot procurement for maintenance shops, contractors, and fabricators.

Key Features

• Grade 8 steel construction meets SAE J429 mechanical property requirements for high-strength fastening
• 7/8-9 UNC coarse thread for reliable engagement in structural and mechanical assemblies
• 4-inch length measured under the head, partially threaded shank for shear-load resistance
• Uncoated finish — suitable for applications where a specific coating or plating will be applied, or where coatings are not required
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws
• Sold in a package quantity of 25 for job-lot and shop stocking use

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 7/8-9 UNC thread pattern with a 4-inch grip length and Grade 8 mechanical properties.

Installation Notes

Installation is performed by licensed millwrights, mechanical contractors, or qualified maintenance technicians using standard hex wrenches or impact tooling sized for 7/8-9 fasteners. Always verify mating thread condition and hole clearance before installation. Torque to the value specified by the equipment manufacturer or applicable structural engineering specification for Grade 8 fasteners of this diameter. De-energize, depressurize, or otherwise isolate the assembly before beginning fastener work on live mechanical systems.