Value Collection D30145-21/2 Hex Cap Screw 5/8-11 X 2.5 in

Product Description

The VALUE COLLECTION D30145-21/2 is a partially threaded hex head cap screw engineered to inch-series dimensional standards per ASME B18.2.1. It features a 5/8-11 UNC thread and a 2.5-inch length under the head, making it a workhorse fastener for structural and mechanical assemblies. The screw is manufactured from Grade 5 steel and finished with a zinc plating that provides basic corrosion resistance in indoor and moderate-exposure environments. Maintenance technicians, millwrights, pipefitters, and general contractors reach for this fastener when assembling equipment frames, pipe supports, mechanical mounts, and similar load-bearing connections that call for a reliable medium-strength hex fastener.

This cap screw is suited for a wide range of industrial, commercial, and light structural applications where an inch-series UNC thread pattern is specified. The partial thread configuration concentrates clamping force through the unthreaded shank, which is advantageous when fastening components of dissimilar thickness or when shear load bearing is a factor. It is commonly found in HVAC equipment frames, mechanical room pipe support hardware, electrical enclosure mounting, and general fabrication work where Grade 5 strength meets the design requirement.

Key Features

• 5/8-11 UNC thread — standard inch-series coarse pitch for broad tool and nut compatibility
• 2.5-inch length under head — partially threaded shank for shear-load and clamping applications
• Grade 5 steel construction — medium-strength classification suitable for structural fastening
• Zinc-plated finish — provides baseline corrosion resistance for indoor and sheltered installations
• Conforms to ASME B18.2.1 — ensures dimensional interchangeability with standard hex nuts and tooling

Compatibility

Designed as a standard ASME B18.2.1 inch-series hex head cap screw compatible with any 5/8-11 UNC hex nut, washer, or tapped hole meeting the same thread standard.

Installation Notes

Installation is performed with a standard 15/16-inch hex wrench or socket driver. Always power down or de-energize associated equipment before fastening components to live electrical or mechanical assemblies. Do not exceed the proof load or yield strength of Grade 5 hardware; consult structural or engineering specifications for torque requirements specific to the application and joint material. Use of a flat washer under the head is recommended when clamping softer materials to prevent surface damage.