Value Collection MP39118 Hex Head Cap Screw 1/2-13 X 5 in Grade 8

Product Description

The VALUE COLLECTION MP39118 is a partially threaded hex head cap screw designed for heavy-duty fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade 8 steel, this fastener delivers high tensile strength and resistance to shear loads. The 1/2-13 UNC thread size paired with a 5-inch length under head makes it well suited for through-bolt applications where significant clamping force is required. A zinc yellow dichromate finish provides corrosion resistance in moderately harsh environments. Installation requires a standard hex wrench or socket driver sized for a 1/2-13 fastener.

This cap screw is used in general industrial maintenance, machine assembly, equipment mounting, and structural fastening where Grade 8 strength is specified. The partial threading allows for a smooth shank section that resists shear stress across joint interfaces. Sold in packs of 10, it is appropriate for production shops, MRO supply rooms, and field service teams working on heavy machinery or fabricated steel structures. It conforms to ASME B18.2.1 dimensional standards, making it a direct fit in applications calling out that specification.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 1/2-13 UNC thread form per ASME B18.2.1 dimensional standard
• 5-inch length under head accommodates thicker assemblies and through-bolt configurations
• Partially threaded shank improves shear resistance at joint interfaces
• Zinc yellow dichromate finish adds corrosion resistance in moderate-exposure environments
• Sold in a 10-piece pack for small-quantity MRO and production use

Compatibility

Designed as an OEM-style replacement or standard-stock fastener for any application specifying a 1/2-13 UNC, Grade 8, partially threaded hex head cap screw conforming to ASME B18.2.1.

Installation Notes

Installation is typically performed by millwrights, maintenance mechanics, or field service technicians using a properly sized hex socket or open-end wrench. Always use a calibrated torque wrench when a torque specification is called out in the equipment service manual. Inspect the mating threaded hole for damage or debris before installation. Do not exceed the rated proof load of the fastener by applying excessive torque or using impact tools without a torque-limiting mechanism.