Value Collection MPKP44084 Hex Cap Screw 1/2-13x3 Grade 8

Product Description

The VALUE COLLECTION MPKP44084 is a partially threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. Manufactured from Grade 8 steel with a zinc-plated finish, this fastener meets ASTM A354 BD standards for proof load, yield strength, and tensile strength. The 1/2-13 UNC thread size and 3-inch length under head make it a common choice where a controlled grip length and high clamp load are required. Sold in packages of 10, these screws are suited for trade professionals working on equipment mounts, machinery frames, and structural connections.

This fastener is used in a wide range of commercial and industrial applications where Grade 8 strength is specified. Typical scenarios include mounting heavy mechanical equipment, securing structural steel connections, and fastening components subject to vibration or dynamic loading. The partial threading preserves a smooth shank section in the grip area, which improves shear resistance and is preferred in bolted joint designs that require precise clamp-length control. Electricians, millwrights, HVAC equipment installers, and general contractors commonly spec Grade 8 zinc-plated fasteners for equipment bases, curb mounts, and structural anchorage work.

Key Features

• Grade 8 steel construction meets ASTM A354 BD proof load and tensile strength requirements
• Zinc-plated finish provides baseline corrosion resistance for indoor and sheltered installations
• Partial threading preserves a full shank grip length for improved shear performance
• 1/2-13 UNC thread form is a standard coarse-pitch size compatible with widely available nuts and tapped holes
• 3-inch length under head suits medium to heavy material stack-ups
• Packaged in quantities of 10 for convenient jobsite use

Compatibility

Designed for use with standard 1/2-13 UNC hex nuts, flat washers, and lock washers in inch-series fastener applications. Suitable as a replacement or supplemental fastener wherever a 1/2-13 x 3-inch Grade 8 partially threaded hex cap screw is specified per ASTM A354 BD.

Installation Notes

Installation should be performed by qualified tradespeople familiar with proper bolted joint practices. Always verify that mating nut grade and thread class are compatible with Grade 8 fastener requirements before assembly. Torque to the value specified by the equipment manufacturer or applicable structural design documentation. Apply thread lubricant or anti-seize only when specified, as doing so changes the torque-tension relationship and can affect clamp load.