S-91381A624 3/8"-16 x 1" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure Component Locking – Class 3A thread fit ensures tight, vibration-resistant connections that maintain positioning under heavy loads
• Corrosion-Resistant Protection – Black-oxide coating on alloy steel provides durable defense against rust in harsh industrial environments
• Surface-Friendly Fastening – Integrated brass tip prevents marring and damage to precision-machined components during installation
• High-Strength Durability – Rockwell C28 hardness rating guarantees reliable performance in demanding mechanical applications
• Easy Installation Access – Hex drive design allows quick tool engagement in confined spaces where headless configuration is required
• Industry-Standard Compatibility – 3/8"-16 UNC coarse threads ensure seamless integration with existing equipment and components
• Regulatory Compliance Assurance – Meets ASME B18.3 specifications while adhering to RoHS 3 and REACH environmental standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in applications requiring precise component positioning and vibration resistance. The Class 3A thread fit with 3/8"-16 UNC coarse threads provides superior holding power in pulleys, gears, and collars, while the brass soft tip eliminates surface damage on shafts and precision components. The headless design with hex drive enables installation in space-constrained assemblies where traditional fasteners cannot be used. Manufactured to Rockwell C28 hardness standards, these set screws maintain their clamping force in high-torque industrial environments, making them ideal for machinery, automotive, and manufacturing equipment where reliability is critical.

Specification Summary & Compliance

This set screw features precision Class 3A thread fit with 3/8"-16 UNC coarse threads and right-hand thread direction. The fastener meets ASME B18.3 manufacturing specifications and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. With a standardized 1" length and 3/16" hex drive configuration, this component ensures consistent performance across industrial applications requiring reliable set screw solutions.