Value Collection 99203 Hex Cap Screw 7/8-9 Grade 8

Product Description

The VALUE COLLECTION 99203 is a partially threaded hex head cap screw engineered for high-strength fastening applications. Manufactured from Grade 8 steel with no surface coating applied, this fastener meets the dimensional and mechanical requirements of ASME B18.2.1 and SAE J429. The 7/8-9 thread designation indicates a 7/8-inch nominal diameter with 9 threads per inch on a UNC thread form. The shank measures 5-1/2 inches under the head. Partial threading allows the unthreaded grip zone to bear shear loads, making this screw appropriate for structural and mechanical assemblies where joint clamping force and shear resistance are both critical.

This fastener is suited for heavy industrial, construction, and mechanical assembly applications where Grade 8 tensile strength is specified by engineering or code. Typical installations include structural steel connections, heavy equipment frames, machinery mounting, and similar bolted joint configurations that demand a high-strength inch-series fastener. Licensed tradespeople and industrial maintenance technicians working with steel structures, HVAC equipment bases, and mechanical systems will encounter this size and grade in standard bolted joint designs. Sold in a package quantity of 10 fasteners, the 99203 is appropriate for both service calls requiring a small quantity and routine stock replenishment.

Key Features

• Grade 8 steel construction meets SAE J429 mechanical property requirements for high-strength applications
• 7/8-9 UNC thread form is the standard coarse-thread series for this diameter
• 5-1/2 inch length under head with partial threading provides an unthreaded grip section for shear load transfer
• Uncoated finish suitable for use as-is or for field application of a specified coating or lubricant
• Conforms to ASME B18.2.1 dimensional standard for hex head cap screws
• Sold in a package of 10 fasteners

Compatibility

Designed as a standard inch-series hex head cap screw for use in any bolted assembly specifying a 7/8-9 UNC Grade 8 fastener per ASME B18.2.1 or SAE J429.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with bolted joint assembly practices. Always verify that the mating nut or tapped hole uses the matching 7/8-9 UNC thread specification before installation. Consult the equipment manufacturer or structural engineer for required torque values, as Grade 8 fasteners must be tightened to a specified preload to develop full joint clamping force. Power down or de-energize any associated equipment before servicing fastened assemblies on mechanical or electrical systems.