Value Collection 440048PR Hex Head Cap Screw 1/4-28 X 3/4 in

Product Description

The VALUE COLLECTION 440048PR is a fully threaded hex head cap screw designed for high-strength fastening applications in industrial and mechanical assemblies. It features a 1/4-28 UNF thread form with a 3/4-inch length under the head, manufactured from Grade L9 alloy steel for superior tensile strength compared to standard Grade 8 fasteners. The zinc yellow dichromate finish provides corrosion resistance in moderate environments. This screw is installed using a 7/16-inch hex wrench or socket and is suited for precision mechanical and hydraulic component assembly where fine-thread engagement and high clamp load are required.

This fastener is suited for use in hydraulic fittings, heavy equipment, tooling fixtures, and industrial machinery where fine-thread UNF fasteners are specified. The fine 1/4-28 thread pitch delivers greater thread engagement per inch compared to coarse-thread alternatives, making it a common choice in thin-walled assemblies and applications subject to vibration or dynamic loading. Licensed mechanics, millwrights, and maintenance technicians typically source this style of screw for OEM-spec replacement and precision assembly work.

Key Features

• Grade L9 alloy steel construction for high tensile and proof load strength
• 1/4-28 UNF fully threaded profile for maximum thread engagement along the entire shank
• Zinc yellow dichromate finish for corrosion and oxidation resistance
• 3/4-inch length under head suits shallow-to-moderate fastening depths
• 7/16-inch hex drive compatible with standard sockets and wrenches
• Inch measurement system with UNF thread standard

Compatibility

Designed as a direct-fit fastener for any application specifying a 1/4-28 UNF fully threaded hex head cap screw in Grade L9 steel with a 3/4-inch length under head.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a calibrated torque wrench and the appropriate 7/16-inch socket or wrench. Always ensure mating threads are clean and free of debris before installation. Apply thread lubricant or thread-locking compound only if called out by the equipment manufacturer. Follow applicable torque specifications from the equipment OEM or relevant fastener standards such as those published by ASME or SAE.