Value Collection D39010 Hex Cap Screw 1/4-20 X 2.5 in Grade 8

Product Description

The VALUE COLLECTION D39010 is a partially threaded hex head cap screw designed for high-strength fastening in demanding mechanical and structural applications. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers elevated tensile strength and corrosion resistance compared to lower-grade alternatives. The 1/4-20 UNC thread pattern and 2.5-inch length under head make it a common choice for assemblies requiring a controlled grip length with a partially threaded shank. This screw conforms to ASME B18.2.1 dimensional standards and is suited for installation by maintenance technicians, millwrights, pipefitters, and general trade professionals.

This fastener is appropriate for use in industrial machinery, mechanical assemblies, HVAC equipment frames, electrical enclosures, and structural brackets where Grade 8 strength is specified. The partially threaded shank allows the unthreaded portion to bear shear loads, making it well suited for bolted joints where precise clamping and alignment are required. The zinc yellow dichromate finish provides a recognizable visual indicator of Grade 8 classification and adds a baseline level of corrosion protection for indoor and light-duty outdoor applications.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish for corrosion resistance and Grade 8 identification
• Partially threaded shank allows the grip length to carry shear loads
• 1/4-20 UNC thread for broad compatibility with standard inch-system hardware
• Conforms to ASME B18.2.1 dimensional standard
• 2.5-inch length under head suits deeper grip applications

Compatibility

Designed for use with standard 1/4-20 UNC inch-series nuts, inserts, and tapped holes conforming to ASME B18.2.1 specifications in mechanical and structural assemblies.

Installation Notes

Installation should be performed by a qualified technician familiar with fastener torque requirements for Grade 8 hardware and the applicable assembly specifications. De-energize or shut down any equipment before accessing fastener locations in live mechanical or electrical systems. Use a calibrated torque wrench and apply torque values specified by the equipment manufacturer or applicable engineering standard. Do not substitute a lower-grade fastener in any application where Grade 8 is specified by design.