Value Collection BT-51618-625-AS Set Screw 5/16-18 X 5/8 in

Product Description

The VALUE COLLECTION BT-51618-625-AS is a Grade 8 alloy steel set screw with a 5/16-18 UNC thread and a 5/8-inch thread length. It features a soft tip point with a brass tip insert, which protects mating shaft surfaces from damage during and after tightening. The hex drive allows torque application with standard hex keys. Grade 8 alloy steel construction provides high tensile and proof load strength, making this fastener suitable for demanding clamping and locking applications in mechanical assemblies.

This set screw is used in mechanical and industrial applications where a shaft, rod, or similar component must be secured within a bore or collar without a protruding fastener head. Typical installations include shaft collars, pulleys, gears, couplings, and sprockets. The brass soft tip reduces surface marring on finished shafts, making it a preferred choice when the mating surface must remain undamaged for repositioning or removal. It is installed by maintenance technicians and machine builders working across industrial, commercial, and light manufacturing environments.

Key Features

• Grade 8 alloy steel construction for high clamping strength and durability
• Soft brass tip point protects finished shaft surfaces from damage
• 5/16-18 UNC thread for broad compatibility with standard inch-series tapped holes
• Hex drive accepts standard hex keys for controlled torque application
• 5/8-inch thread length provides adequate engagement depth for secure holding
• Fully threaded, headless design sits flush or below the surface of the collar or hub

Compatibility

Designed as a standard inch-series set screw for use in any 5/16-18 UNC tapped hole requiring a soft tip, headless fastener in Grade 8 alloy steel.

Installation Notes

Installation is performed with a hex key or Allen wrench sized for a 5/16-18 set screw. Ensure the tapped hole is clean and free of debris before threading in the fastener. De-energize or lock out any rotating machinery before servicing shaft-mounted components. Do not exceed the rated torque for the thread size and grade, and verify the brass tip is seated correctly against the shaft before final tightening.