S-91381A368 3/8"-24 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Non-marring brass tip prevents damage to precision components while maintaining secure clamping force
• Class 3A thread fit ensures superior precision and reliable engagement in demanding applications
• Black-oxide surface treatment provides excellent corrosion resistance and enhanced durability
• Alloy steel construction with Rockwell C28 hardness delivers optimal strength and wear resistance
• Headless hex drive design allows for flush installation in confined spaces with secure 3/16" drive engagement
• Fine UNF thread profile offers superior vibration resistance and precise adjustment capability
• Full regulatory compliance meets ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This black-oxide alloy steel set screw with brass soft tip addresses critical engineering challenges in precision assembly applications. The UNF fine thread configuration (3/8"-24) provides exceptional vibration resistance, making it ideal for machinery subject to dynamic loads. The headless hex drive design enables flush mounting in space-constrained applications while maintaining accessibility for adjustments. The brass tip material eliminates surface damage on shafts, collars, and precision components, preserving product integrity in sensitive assemblies. Engineered with Rockwell C28 hardness, this fastener maintains dimensional stability under repeated tightening cycles, ensuring long-term reliability in industrial equipment, automotive components, and precision manufacturing applications where non-marring fastening solutions are essential.

Specification Summary & Compliance

This precision set screw features 3/8"-24 UNF Class 3A threads with fine thread spacing for superior fit and performance. The fastener maintains exacting dimensional tolerances as specified by ASME B18.3 standards, ensuring interchangeability and reliable performance. The black-oxide alloy steel construction provides consistent mechanical properties with a Rockwell C28 hardness rating. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety. The 5/8" length and 3/16" hex drive configuration provide optimal engagement for secure fastening in various industrial applications.