Value Collection D39005 Hex Cap Screw 1/4-20 X 1-1/4 in Grade 8

Product Description

The VALUE COLLECTION D39005 is a 1/4-20 x 1-1/4 inch hex head cap screw manufactured from Grade 8 steel with a zinc yellow dichromate finish. Grade 8 is a high-strength fastener classification suited for demanding mechanical and structural applications where standard hardware grades are insufficient. The partially threaded shank allows for precise clamping force without thread engagement through the full grip length. This screw conforms to ASME B18.2.1, the governing standard for inch-series hex cap screws. Machinists, millwrights, industrial maintenance technicians, and general contractors install this type of fastener in equipment assembly, structural connections, and machinery repair.

This hex head cap screw is appropriate for use in heavy-duty mechanical assemblies, industrial equipment mounting, and structural connections that require a high-strength UNC-threaded fastener. The 1/4-20 UNC thread pitch is one of the most common inch-series thread sizes in North American trade work, making this screw a frequent fit for replacement and maintenance tasks in manufacturing, construction, and equipment service environments. The zinc yellow dichromate finish provides a base level of corrosion resistance suitable for indoor and controlled-environment applications.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/4-20 UNC thread standard for broad compatibility with inch-series hardware
• Partially threaded shank provides controlled grip and clamping performance
• Zinc yellow dichromate finish offers corrosion resistance in controlled environments
• Conforms to ASME B18.2.1 dimensional standards for hex cap screws
• 1-1/4 inch length under head measured per ASME specification

Compatibility

Designed as a standard 1/4-20 UNC Grade 8 hex head cap screw per ASME B18.2.1, suitable for use with any inch-series 1/4-20 tapped hole or hex nut requiring a high-strength fastener.

Installation Notes

Install using the appropriate hex wrench or socket driver sized for a 1/4-20 hex head cap screw. Power down or de-energize any equipment before fastener installation or removal on mechanical or electrical assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant standards such as the ASME guidelines for Grade 8 fasteners. Inspect threads on both the screw and mating hardware for damage before assembly to ensure full load-bearing engagement.