Value Collection MPKP45135 Hex Cap Screw 3/4-16 X 3 in Grade 8

Product Description

The VALUE COLLECTION MPKP45135 is a 3/4-16 partially threaded hex head cap screw rated Grade 8, manufactured from steel with a zinc-plated finish. Grade 8 is the highest commonly specified SAE grade for inch-series fasteners, offering minimum proof strength of 120,000 psi and tensile strength of 150,000 psi — making this screw appropriate for high-stress mechanical assemblies. The 3-inch length under head and UNF (Unified National Fine) thread pitch of 16 threads per inch provide strong clamping force in steel-to-steel and flange-mounted applications. Zinc plating provides baseline corrosion resistance in moderately exposed environments. This item ships in a pack of 5.

This screw is commonly used by millwrights, pipefitters, HVAC equipment installers, and maintenance technicians assembling or servicing heavy mechanical equipment, structural mounts, equipment bases, and flange connections. The fine thread pitch suits applications where precise torque control and vibration resistance are priorities, such as motor mounts, compressor hold-downs, and structural brackets in mechanical rooms. Grade 8 steel makes it suitable for demanding load-bearing joints where standard Grade 5 hardware is insufficient.

Key Features

• Grade 8 steel construction for high-tensile-strength bolted joints
• 3/4-16 UNF fine thread for precise clamping and vibration resistance
• Partially threaded shank allows for shear load transfer across unthreaded grip length
• Zinc-plated finish for moderate corrosion resistance in indoor and semi-exposed installations
• Meets ASTM A354 BD standard for mechanical and chemical requirements
• Sold in a pack of 5 with a minimum order quantity of 1 pack

Compatibility

Designed for use in standard 3/4-16 UNF tapped holes or with matching 3/4-16 UNF nuts in inch-system mechanical assemblies requiring Grade 8 fastener specification.

Installation Notes

Installation is performed by qualified millwrights, pipefitters, or maintenance technicians using standard hex sockets or wrenches sized for 3/4-inch hex head fasteners. Always torque to the specification listed in the equipment manufacturer's service documentation for Grade 8 UNF fasteners at this diameter. De-energize and lock out all equipment per OSHA LOTO procedures before servicing any bolted joint. Do not substitute Grade 8 hardware with lower-grade fasteners in structural or high-load applications.