Value Collection R52001139 Machine Screw 5/16-18 X 2-1/4 in

Product Description

The VALUE COLLECTION R52001139 is a 5/16-18 x 2-1/4 inch pan head Phillips machine screw manufactured from steel with a zinc-plated finish. Conforming to ASME B18.6.3 and SAE J82, this fastener meets established dimensional and mechanical standards for inch-series machine screws. The pan head profile provides a low-profile bearing surface suitable for general-purpose fastening applications. The Phillips drive accepts standard Phillips screwdrivers and power bits. Length is measured under the head, giving a 2-1/4 inch grip length. Zinc plating provides baseline corrosion resistance in typical indoor or sheltered environments. This screw is sold individually but requires a minimum order quantity of 100 units.

This fastener is used across a wide range of mechanical assembly, enclosure, and equipment mounting applications. Typical users include HVAC technicians, electricians, plumbers, and general maintenance professionals who need reliable inch-series machine screws for panel assembly, equipment housing attachment, or structural fastening. The 5/16-18 coarse thread engages quickly and holds well in tapped metal or with a nut. It is suited for light- to medium-duty applications where a standard pan head profile and Phillips drive are required.

Key Features

• 5/16-18 UNC coarse thread for fast engagement in tapped holes or with hex nuts
• Pan head profile with Phillips drive for use with standard bits and screwdrivers
• Steel construction with zinc-plated finish for corrosion resistance in sheltered environments
• Meets ASME B18.6.3 and SAE J82 dimensional and material standards
• 2-1/4 inch length measured under the head
• No washer — plain bearing surface under head

Compatibility

Designed as a standard inch-series machine screw for use in any application requiring a 5/16-18 coarse thread, pan head, Phillips drive fastener conforming to ASME B18.6.3.

Installation Notes

Installation is performed with a Phillips screwdriver or power driver fitted with an appropriately sized Phillips bit. Ensure the mating thread or nut is a matching 5/16-18 UNC specification before driving. Do not overtorque — pan head screws have lower torque thresholds than hex head fasteners of the same diameter. When used in electrical enclosures or HVAC equipment, confirm fastener selection complies with the equipment manufacturer's specifications and any applicable NEC or equipment code requirements.