Value Collection KP45586 Hex Head Cap Screw 1/2-13 X 7.5 in Grade 8

Product Description

The VALUE COLLECTION KP45586 is a hex head cap screw designed for heavy-duty fastening applications requiring high tensile strength. Sized at 1/2-13 thread pitch with a 7-1/2 inch length under the head, this fastener is partially threaded and manufactured from Grade 8 steel in an uncoated finish. Grade 8 is the highest common SAE classification for inch-series steel bolts, providing significantly greater proof load and tensile strength than Grades 2 or 5. It conforms to ASME B18.2.1, the standard governing inch-series hex head screws, ensuring dimensional consistency across sourcing. Machinists, maintenance technicians, fabricators, and mechanical contractors reach for Grade 8 hardware when joint integrity under dynamic or heavy static loading is required.

This screw is suited for structural assemblies, heavy equipment maintenance, machinery fabrication, and industrial repair work where a UNC 1/2-13 thread form is specified. The partial threading allows for a smooth shank section through one or more members of a joint, which helps maintain precise alignment and improves shear load handling compared to fully threaded fasteners of the same length. Applications span manufacturing floor machinery, steel frame assemblies, and trade mechanical work wherever Grade 8 tensile performance is called for.

Key Features

• Grade 8 steel construction for high proof load and tensile strength
• 1/2-13 UNC thread pitch for broad compatibility with standard inch-series nuts and tapped holes
• 7-1/2 inch length under head accommodates deep joint stacks
• Partially threaded shank improves alignment and shear resistance in multi-member joints
• Uncoated finish suitable for use as-installed or for secondary plating or coating processes
• Conforms to ASME B18.2.1 for dimensional accuracy and interchangeability

Compatibility

Designed for use with standard 1/2-13 UNC inch-series hex nuts, flat washers, and lock washers in heavy-duty bolted joint assemblies requiring Grade 8 tensile performance.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or trade technician familiar with proper torque procedures for Grade 8 inch-series fasteners. Always verify the mating nut or tapped hole matches the 1/2-13 UNC thread specification before assembly. Use a calibrated torque wrench and follow the applicable engineering or equipment manufacturer torque specification for the joint. Do not substitute a lower-grade nut or tapped-hole material, as the clamping load developed by a Grade 8 fastener can exceed the capacity of lower-grade mating hardware.