Value Collection 39241 Hex Head Cap Screw 1-1/4-7 X 3-1/2 in Grade 8

Product Description

The VALUE COLLECTION 39241 is a fully threaded hex head cap screw designed for high-strength mechanical and structural fastening applications. Built to Grade 8 steel specifications, this fastener delivers the tensile strength required for heavy-duty bolted connections in industrial, commercial, and trade service environments. The 1-1/4-7 UNC thread profile and 3-1/2 inch length under head make it suited for thick-flange and structural-member assemblies. A zinc yellow dichromate finish provides corrosion resistance in demanding service conditions. Sold in a package quantity of 5, this fastener meets ASME B18.2.1 dimensional standards for consistent fit and function across standard hex tooling.

This cap screw is used in applications requiring high-load fastening with fully threaded engagement, such as HVAC equipment mounting, mechanical equipment bases, structural steel connections, and heavy industrial assemblies. The UNC thread form is standard across the inch-measurement fastener market, making this screw compatible with a wide range of tapped holes and nuts in general trade and mechanical service work. Licensed tradespeople across HVAC, plumbing, and mechanical contracting regularly specify Grade 8 hex head fasteners where vibration resistance and high clamp load are required.

Key Features

• Grade 8 steel construction for high tensile and proof load strength in demanding fastening applications
• Fully threaded body along the 3-1/2 inch length under head for maximum thread engagement
• 1-1/4-7 UNC thread standard ensures compatibility with standard inch-series tapped holes and hex nuts
• Zinc yellow dichromate finish provides corrosion resistance in industrial and outdoor service environments
• Conforms to ASME B18.2.1 dimensional standards for consistent fit with standard hex tooling
• Sold in a package of 5 units with a minimum order quantity of 1 package

Compatibility

Designed for use with standard 1-1/4-7 UNC inch-series tapped holes, hex nuts, and washers in mechanical and structural fastening applications. No specific equipment or model compatibility was provided in the product data.

Installation Notes

Installation is typically performed by licensed mechanical, HVAC, or structural tradespeople using standard hex drive tooling sized for 1-1/4 inch fasteners. Follow applicable torque specifications from the equipment manufacturer or relevant standards for Grade 8 fasteners at this thread size. Ensure mating threads are clean and free of debris before installation. Do not substitute a lower-grade fastener in applications specifying Grade 8 hardware.