Value Collection KP44123 Hex Cap Screw 5/8-11 X 4-1/2 in Grade 8

Product Description

The VALUE COLLECTION KP44123 is a partially threaded hex head cap screw designed for heavy-duty fastening applications. It features a 5/8-11 UNC thread form and measures 4-1/2 inches under the head. The fastener is manufactured from Grade 8 steel and finished with a zinc plating for corrosion resistance. Rated to ASTM A354 BD, it meets recognized standards for proof load, yield strength, and tensile strength. This screw is a common choice for structural connections, equipment mounting, and mechanical assemblies where high-strength fasteners are required. Licensed trades and industrial maintenance crews install it in a wide range of commercial and light industrial settings.

This cap screw suits high-load bolted joint applications in HVAC equipment mounting, structural steel connections, machinery frames, and general mechanical assemblies. The partially threaded shank provides a bearing surface in the bolt hole, which is preferred in applications where the fastener spans a shear plane or where precise clamp load distribution matters. Sold in packages of 10, it is well suited for service vans or shop stock where having multiples on hand reduces downtime.

Key Features

• Grade 8 steel construction meets ASTM A354 BD for high proof load and tensile strength
• Partially threaded shank supports shear-plane applications and clean bearing-surface fit
• 5/8-11 UNC thread is a standard coarse pitch, compatible with common Grade 8 nuts and tapped holes
• Zinc-plated finish provides basic corrosion resistance for indoor and sheltered outdoor installations
• Sold in packages of 10 for convenient shop or van stock replenishment

Compatibility

Designed for use with 5/8-11 UNC-threaded nuts, washers, and tapped holes requiring a Grade 8 or equivalent high-strength fastener in inch-series bolted assemblies.

Installation Notes

Installation should follow applicable torque specifications from a recognized fastener standard or equipment OEM documentation, as torque values vary by application and lubrication condition. Always use a calibrated torque wrench and the correct Grade 8 or compatible nut and hardened washer. Inspect threads and mating hardware for damage before installation. Do not mix Grade 8 hardware with lower-grade nuts or soft materials that cannot support the designed clamp load.