Value Collection D30281 Hex Head Cap Screw 1/2-20

Product Description

The VALUE COLLECTION D30281 is a fully threaded hex head cap screw designed for general fastening applications across mechanical, structural, and industrial assembly work. Sized at 1/2-20 UNF with a 1-1/2 inch length under head, this fastener is manufactured from Grade 5 steel and finished with a zinc plating for corrosion resistance in standard service environments. It conforms to ASME B18.2.1, the governing standard for inch-series hex cap screws. Installers working in fabrication, equipment maintenance, or field service will recognize this as a standard-inventory fastener suited to high-volume fastening tasks.

This screw is appropriate for residential and commercial mechanical applications where a fine-thread UNF fastener is specified. The 1/2-20 thread pitch provides tighter thread engagement than a coarse-thread equivalent, making it a common choice when vibration resistance or precise torque control is a priority. It is used by HVAC technicians, pipefitters, electricians, and general maintenance trades for panel mounting, bracket attachment, and equipment assembly tasks requiring a standardized hex drive fastener.

Key Features

• 1/2-20 UNF fine-thread profile for tighter thread engagement and improved vibration resistance
• 1-1/2 inch length under head for standard through-bolt and tapped-hole applications
• Grade 5 steel construction for reliable tensile strength in medium-duty fastening
• Zinc plating provides corrosion resistance in typical indoor and sheltered outdoor environments
• Fully threaded shank maximizes thread engagement across the full grip length
• Meets ASME B18.2.1 for dimensional consistency and interchangeability

Compatibility

Designed as a standard UNF inch-series hex head cap screw compatible with any 1/2-20 tapped hole or matching nut conforming to ASME B18.2.1 dimensional requirements.

Installation Notes

Install using a standard hex wrench, socket, or ratchet sized for a 1/2-20 fastener. Ensure the mating thread is clean and free of debris before installation. Do not exceed the torque specification for Grade 5 fasteners as defined by the application engineer or equipment manufacturer. When replacing fasteners in electrical enclosures or pressurized systems, de-energize and depressurize the system before service.