Value Collection D30037 Hex Head Cap Screw 5/16-18 X 3 in

Product Description

The VALUE COLLECTION D30037 is a partially threaded hex head cap screw designed for general-purpose mechanical fastening in industrial, commercial, and trade applications. It features a 5/16-18 UNC thread size and measures 3 inches under the head. Manufactured from Grade 5 steel with a zinc-plated finish, this fastener delivers solid tensile strength and moderate corrosion resistance. The partial threading allows for a smooth shank section, which is useful in applications requiring precise clamping without thread engagement across the full grip length. It conforms to ASME B18.2.1 dimensional standards.

This cap screw is suited for structural and mechanical assemblies where a standard hex drive fastener is specified. Typical applications include equipment framing, bracket mounting, mechanical enclosures, and general assembly work across HVAC, plumbing, electrical, and light fabrication trades. The zinc plating provides adequate protection for indoor and sheltered outdoor environments. This fastener is sold individually but requires a minimum order quantity of 25 units.

Key Features

• 5/16-18 UNC thread form, partially threaded with smooth shank section for clean clamping
• 3-inch length measured under the head per ASME B18.2.1
• Grade 5 steel construction for reliable tensile and proof load performance
• Zinc-plated finish for moderate corrosion resistance in sheltered environments
• Conforms to ASME B18.2.1 dimensional standards for consistent fitment and interchangeability

Compatibility

Designed as a standard UNC hex head cap screw replacement or assembly fastener for any application specifying a 5/16-18 x 3-inch Grade 5 partially threaded fastener per ASME B18.2.1.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for the 5/16-inch hex head. Ensure mating threads are clean and free of debris before installation. Apply thread locking compound or hardened washers where vibration or load cycling is a concern. Do not exceed the rated proof load of Grade 5 hardware by over-torquing during installation.