Value Collection NT-440-187-AS Set Screw 4-40 Soft Tip

Product Description

The VALUE COLLECTION NT-440-187-AS is a 4-40 UNC hex-drive set screw with a soft nylon tip point, manufactured from Grade 8 alloy steel. Set screws of this type are used to secure a component — such as a collar, gear, or pulley — against a shaft without a protruding head. The nylon tip protects the mating surface from marring while still providing positive clamping force. The 3/16-inch thread length suits compact assemblies where space is constrained. This fastener is installed by maintenance technicians, millwrights, and mechanical assemblers working across HVAC equipment, motors, and general industrial machinery.

This set screw is suited for light-duty mechanical assemblies requiring a non-marring clamping point. Typical applications include shaft collars on small motors, setscrew-style shaft couplings, and precision instrument components where surface protection on the mating shaft is required. The 4-40 thread size is common in miniature and instrumentation-grade assemblies. The UNC and UNF dual-standard thread designation provides flexibility across both coarse and fine-thread tapped holes of the same nominal diameter.

Key Features

• Soft nylon tip protects mating shaft surfaces from damage during clamping
• Grade 8 alloy steel body delivers high tensile and torsional strength for the 4-40 thread class
• Hex drive socket allows installation with a standard hex key or Allen wrench
• UNC and UNF thread standard compatibility broadens fitment across tapped hole types
• 3/16-inch thread length suits compact, space-constrained mechanical assemblies

Compatibility

Designed as a standard 4-40 hex-drive soft-tip set screw for use in any tapped 4-40 UNC or UNF threaded hole requiring a non-marring nylon tip point.

Installation Notes

Installation is performed using a correctly sized hex key; use of an undersized key risks rounding the drive socket. De-energize and lock out any motor or rotating equipment before installing or adjusting set screws. Apply only enough torque to achieve positive clamping without stripping the small 4-40 thread. Inspect the nylon tip for wear or deformation periodically, particularly in high-vibration environments.