Value Collection BT-440-250-AS Set Screw 4-40 X 1/4 in

Product Description

The VALUE COLLECTION BT-440-250-AS is a 4-40 x 1/4-inch set screw designed for applications requiring a non-marring hold point. Manufactured from Grade 8 alloy steel with a brass soft tip, this fastener applies clamping force against a shaft or surface without scoring or damaging the mating part. The hex drive socket accepts a standard hex key for installation and removal. Grade 8 alloy steel construction provides the tensile strength needed for high-load fastening tasks in mechanical assemblies, tooling fixtures, and equipment maintenance work.

This set screw is used in light mechanical assemblies where a 4-40 UNC or UNF threaded hole is present and shaft or component protection is a priority. The brass soft tip is commonly specified in precision instrument work, motor shaft collars, encoder mounts, and similar applications where a hardened point would damage a polished or soft mating surface. Machinists, maintenance technicians, and mechanical assemblers typically install this fastener in production and repair settings.

Key Features

• Grade 8 alloy steel body for high tensile strength in a small-diameter fastener
• Brass soft tip prevents scoring or marring of shafts and mating surfaces
• Hex drive socket accepts standard hex keys for installation in tight clearances
• 4-40 UNC/UNF thread standard for broad compatibility with standard tapped holes
• 1/4-inch thread engagement length measured along the full thread

Compatibility

Designed as a standard-dimension replacement or stock fastener for any mechanical assembly using a 4-40 UNC or UNF tapped hole that requires a soft-tip set screw.

Installation Notes

Installation requires a hex key sized for a 4-40 set screw socket. De-energize or lock out any rotating equipment before installing or adjusting set screws on shaft collars or couplings. Do not exceed the rated torque range for a 4-40 Grade 8 fastener, and ensure the brass tip is properly seated against the mating surface before final tightening. General industrial fastener practice and applicable equipment manufacturer guidelines should be followed during installation.