Value Collection MP39108 Hex Head Cap Screw 1/2-13x2 Grade 8

Product Description

The VALUE COLLECTION MP39108 is a 1/2-13 x 2 inch Grade 8 steel hex head cap screw with a zinc yellow dichromate finish and partial threading. Conforming to ASME B18.2.1, this fastener is built for high-strength bolted connections where torque loads and shear forces demand a reliable, hardened fastener. Grade 8 steel offers significantly higher tensile strength than Grade 5 or Grade 2 equivalents. The zinc yellow dichromate coating provides corrosion resistance and is visually identifiable by its yellow-gold appearance. This screw uses UNC (Unified National Coarse) threading at 1/2-13, meaning 13 threads per inch on a 1/2 inch nominal diameter shank. Sold in a package of 25.

This fastener is used across a wide range of industrial, mechanical, and structural applications where Grade 8 strength is specified. Common install scenarios include equipment mounting, structural steel connections, machinery assembly, and heavy-duty brackets. The partial threading allows for full bearing contact in the unthreaded shank area, making it well suited for connections that require shear load transfer. Maintenance technicians, millwrights, pipefitters, and general contractors regularly use this size and grade in both new construction and repair work.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish for corrosion resistance and easy grade identification
• Partial threading allows shank to bear shear loads at joint interfaces
• UNC 1/2-13 thread form for broad compatibility with standard nuts and tapped holes
• Conforms to ASME B18.2.1 dimensional standard
• Packaged in quantities of 25 per pack

Compatibility

Designed for use with standard 1/2-13 UNC nuts, washers, and tapped holes conforming to ASME and ANSI inch-series fastener standards.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician familiar with fastener torque specifications for Grade 8 hardware. Always use a calibrated torque wrench and follow the applicable equipment or structural specification for target clamp load. De-energize and lock out any equipment before replacing or tightening fasteners on live machinery. Do not substitute a lower-grade fastener in any application that specifies Grade 8.