Value Collection R52001097 Hex Cap Screw 1-1/2-6 X4in Grade 5

Product Description

The VALUE COLLECTION R52001097 is a partially threaded hex head cap screw sized 1-1/2-6 UNC by 4 inches under head, manufactured from Grade 5 steel with a zinc-plated finish. Grade 5 steel provides mid-range tensile strength suitable for structural and mechanical fastening applications across industrial and commercial settings. The zinc plating delivers baseline corrosion resistance in moderately exposed environments. This fastener conforms to ASME B18.2.1 and SAE J429 standards, making it a recognized choice for engineers and tradespeople who specify to those dimensional and mechanical property standards. Machinists, millwrights, pipefitters, and general contractors routinely stock this size for heavy-duty bolted connections.

This cap screw is appropriate for large-diameter bolted assemblies where a partially threaded shank is required to maintain shear strength across the grip length. Typical applications include structural steel connections, equipment mounting, heavy machinery assembly, pump and motor base plate fastening, and general industrial MRO work. The 1-1/2-6 UNC thread is a coarse-series designation well suited for thick steel or cast-iron joints where quick assembly and resistance to thread stripping are priorities.

Key Features

• 1-1/2-6 UNC coarse thread provides strong engagement in thick steel and cast-iron joints
• 4-inch length measured under head accommodates wide grip ranges in structural assemblies
• Grade 5 steel meets SAE J429 minimum tensile and proof load requirements
• Zinc-plated finish offers baseline corrosion resistance for indoor and mildly exposed installations
• Partially threaded shank preserves shear capacity across the unthreaded bearing length
• Conforms to ASME B18.2.1 for hex head dimensional standards

Compatibility

Designed for use in any bolted joint requiring a 1-1/2-6 UNC hex head cap screw with partial threading, conforming to ASME B18.2.1 and SAE J429 specifications. Suitable for use with standard heavy hex nuts and hardened washers of matching thread size and grade.

Installation Notes

Installation should be performed by qualified tradespeople using appropriately rated torque wrenches sized for 1-1/2-inch hex fasteners. Always confirm mating nut grade and hardened washer selection match or exceed the Grade 5 fastener rating before torquing. De-energize and lock out any equipment before fastener replacement on live machinery per OSHA lockout-tagout procedures. Do not substitute Grade 5 hardware in joints engineered for Grade 8 or metric property class 10.9 fasteners without engineering review.