Value Collection BT-51618-250-AS Set Screw 5/16-18 X 1/4 in

Product Description

The VALUE COLLECTION BT-51618-250-AS is a Grade 8 alloy steel set screw with a soft brass tip, designed for secure, no-mar fastening in mechanical assemblies. The hex drive accepts a standard hex key for installation into threaded components. At 5/16-18 thread size with a 1/4-inch thread length, this fastener is suited for applications where a hardened steel screw must seat firmly against a shaft or surface without causing permanent damage to the mating part. The brass tip deforms slightly under load, gripping without scoring. Installers in HVAC, mechanical, and light industrial settings use this type of fastener regularly in motor shaft collars, set collar assemblies, and similar connections.

This set screw fits threaded bores calling for a 5/16-18 UNC or UNF thread and a 1/4-inch overall screw length. It is commonly used in shaft collar assemblies, gear hubs, pulleys, and mechanical couplings where holding force is needed without marring the shaft surface. The soft brass tip is the key distinguishing feature, making it the correct choice when protecting the shaft finish or preventing shaft movement under vibration. Suitable for residential and light commercial mechanical service work. Sold individually; minimum order quantity is 10 pieces.

Key Features

• Grade 8 alloy steel construction for high tensile and torsional strength
• Soft brass tip prevents shaft scoring and surface damage at the contact point
• Hex drive accepts standard hex keys for installation in tight spaces
• 5/16-18 UNC and UNF thread compatibility for broad fitment
• 1/4-inch thread length suits shallow-bore and thin-wall collar applications

Compatibility

Designed as an OEM-style replacement or standard-service fastener for any threaded bore requiring a 5/16-18 set screw with a 1/4-inch length and soft tip point.

Installation Notes

Installation is performed with a properly sized hex key; ensure the hex socket is fully seated before applying torque to avoid rounding the drive. De-energize and lock out any equipment before servicing shaft collars or rotating assemblies. Do not substitute a cup point or cone point set screw where a soft tip is specified, as shaft damage or collar loosening may result. Follow applicable mechanical and equipment manufacturer guidelines for fastener installation procedures.