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The VALUE COLLECTION D30055 is a fully threaded hex head cap screw sized 3/8-16 x 1-1/4 inches, manufactured from Grade 5 steel with a zinc-plated finish. The UNC thread form and ASME B18.2.1 standard compliance make this fastener a reliable choice for structural and mechanical assemblies across trade applications. Length is measured under the head. The zinc plating provides basic corrosion resistance for general indoor and light-duty outdoor use. At 0.01 pounds per piece, this screw is suited for applications where consistent thread engagement and clamping force are required without excessive bulk.
This fastener is used in a wide range of residential and light commercial maintenance, repair, and fabrication tasks. HVAC technicians, plumbers, electricians, and general maintenance trades reach for Grade 5 hex cap screws when fastening brackets, panels, equipment frames, and mechanical assemblies. The 3/8-16 UNC thread is one of the most common fastener sizes in North American trade work, making the D30055 a practical stock item for service vehicles and shop inventory alike.
Designed as a general-purpose replacement or stocking fastener for any application requiring a 3/8-16 UNC hex head cap screw conforming to ASME B18.2.1.
Install with a standard hex wrench or socket drive sized for a 3/8-inch hex head cap screw. Always torque to the specification required by the equipment manufacturer or applicable structural standard — do not rely on feel alone for safety-critical joints. Inspect threads and mating hardware for damage before installation. De-energize and lock out electrical equipment before fastening near live components, in accordance with applicable NFPA 70E or site safety procedures.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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