Value Collection -30170-51/2 Hex Cap Screw 1-8x5.5in Grade 5

Product Description

The VALUE COLLECTION -30170-51/2 is a partially threaded hex head cap screw designed for heavy-duty bolted assemblies requiring reliable clamping strength. Manufactured from Grade 5 steel with a zinc-plated finish, this fastener meets ASME B18.2.1 and SAE J429 standards. The 1-8 thread size follows Unified National Coarse (UNC) specification, and the 5.5-inch length under head suits deep-reach fastening applications in structural, mechanical, and equipment-mounting scenarios. The zinc plating provides a baseline level of corrosion resistance for general-purpose use. Installers in HVAC, plumbing, electrical, and general mechanical trades will find this screw suitable for equipment frames, brackets, and structural connections.

This hex head cap screw is applicable to a wide range of industrial, commercial, and trade service environments. Its partially threaded shank allows for precise clamping without thread engagement through the full grip length, which is preferred in bolted joint applications where shank bearing load matters. Typical installations include equipment support frames, mechanical enclosures, pipe hangers, and structural steel connections requiring a standard 1-8 UNC coarse-thread fastener at 5.5-inch length under head.

Key Features

• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides general corrosion resistance for indoor and light-duty outdoor use
• Partially threaded shank allows proper clamping load distribution in bolted joints
• 1-8 UNC thread form is widely compatible with standard coarse-thread hex nuts and tapped holes
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws
• Sold in a package quantity of 12 with a minimum order quantity of 1

Compatibility

Designed as a standard 1-8 UNC coarse-thread hex head cap screw suitable for use with any hex nut, washer, or tapped hole conforming to ASME B18.2.1 and UNC thread specifications.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using the appropriate size hex wrench or socket. Always verify thread engagement and mating thread condition before final assembly. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for the specific joint application. Do not reuse fasteners that show signs of thread damage, corrosion, or deformation.