Value Collection 99224 Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 99224 is a partially threaded hex head cap screw designed for heavy-duty fastening applications in mechanical, structural, and industrial assemblies. Manufactured from Grade 8 steel with an uncoated finish, this fastener delivers high tensile strength suited for demanding load-bearing connections. The screw measures 1-8 thread size with a 5-1/2 inch length under the head and follows the UNC thread standard. It conforms to ASME B18.2.1 dimensional specifications, making it a reliable choice for applications where precise fitment and strength grade compliance are required. Mechanical contractors, millwrights, and industrial maintenance technicians are the primary installers of this fastener type.

This hex head cap screw is used across a wide range of trade and industrial settings including HVAC equipment mounting, plumbing system supports, electrical enclosure assemblies, and general structural fabrication. The partially threaded shank provides a clamping zone that resists joint slippage under vibration and dynamic loads. At 1-8 thread pitch, this screw is commonly found in mid-to-large diameter structural connections where coarse thread engagement and high proof load are priorities. Sold in packages of 10, this item suits service stock replenishment and job-site use.

Key Features

• Grade 8 steel construction provides high tensile and proof load ratings for demanding fastening applications
• Partially threaded shank allows full clamping force across joined materials without thread interference
• UNC thread form at 1-8 pitch offers coarse engagement compatible with standard tapped holes and hex nuts
• Conforms to ASME B18.2.1 for dimensional accuracy and interchangeability
• Uncoated finish suitable for use in dry interior environments or where secondary coating will be applied
• Packaged in quantities of 10 for convenient service stock and small-batch procurement

Compatibility

Designed as a standard-dimension replacement or stock fastener for any application requiring a 1-8 UNC, 5-1/2 inch Grade 8 hex head cap screw conforming to ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with fastener torque requirements for Grade 8 hardware. Always verify that the mating tapped hole or nut matches the 1-8 UNC thread specification before installation. De-energize, depressurize, or otherwise safe off any equipment before fastener replacement or structural disassembly. Do not substitute a lower-grade fastener in any application that specifies Grade 8 hardware.