Value Collection BT-51618-312-AS Set Screw 5/16-18 X 5/16 in

Product Description

The VALUE COLLECTION BT-51618-312-AS is a Grade 8 alloy steel set screw with a soft brass tip, sized 5/16-18 x 5/16 inches. Set screws of this type are used to secure a component — such as a collar, pulley, gear, or sprocket — onto a shaft without a protruding head. The hex drive socket accepts a standard hex key for installation and removal. The brass soft tip protects the mating shaft surface from marring or galling, making this screw a common choice where shaft integrity must be preserved during adjustment or service. This fastener suits mechanical assembly and maintenance work across HVAC, industrial, and general trade applications.

This set screw is suited for residential and commercial mechanical assemblies where a flush, low-profile fastener is required and shaft-surface protection is a priority. Typical install scenarios include securing drive pulleys on blower assemblies, positioning collars on motor shafts, and locking hubs or couplings in place. The UNC thread standard ensures compatibility with standard inch-series tapped holes sized 5/16-18. Sold individually with a minimum order quantity of 10 units per order.

Key Features

• Soft brass tip minimizes surface damage and galling on mating shafts
• Grade 8 alloy steel construction provides high tensile and torsional strength
• Hex socket drive accepts standard hex keys for installation in tight clearances
• 5/16-18 UNC thread fits standard inch-series tapped holes
• Headless design sits flush with or below the surface of the workpiece
• Thread length measured as full fastener length: 5/16 inches

Compatibility

Designed for use in standard inch-series 5/16-18 UNC tapped holes where a soft-tip set screw is required to secure components to a shaft without marring the shaft surface.

Installation Notes

Set screws of this type are installed by licensed millwrights, HVAC technicians, and maintenance mechanics using a properly sized hex key or hex bit driver. De-energize all equipment and lock out power before disassembling shaft-mounted components. Avoid over-tightening, which can deform the brass tip and reduce its shaft-protection benefit. Ensure the tapped hole is clean and free of debris before threading the screw in to prevent cross-threading.