S-91375A523 1"-14 x 3" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Enhanced Durability - Black-oxide coating on alloy steel provides superior corrosion resistance, extending service life in harsh industrial environments.
• Precise Thread Engagement - Class 3A fit ensures tight, secure fastening with minimal backlash, ideal for high-vibration applications.
• High Torque Capability - 9/16" hex drive allows for substantial tightening force without stripping, ensuring reliable installation.
• Optimized Material Strength - Rockwell C45 hardness delivers excellent wear resistance and maintains structural integrity under heavy loads.
• Secure Component Locking - Cup tip design concentrates pressure for superior grip, preventing shaft or collar slippage.
• Industry Compliance - Meets ASME B18.3 and ASTM F912 standards, guaranteeing dimensional accuracy and performance consistency.
• Environmental Safety - RoHS 3 and REACH compliance ensures safe use in regulated industries without hazardous substances.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address critical challenges in machinery assembly and precision equipment. The 1"-14 fine thread with Class 3A fit provides exceptional clamping force and vibration resistance, preventing loosening in dynamic systems like motor shafts, gear assemblies, and rotating components. The headless design with hex drive facilitates flush mounting in confined spaces, while the cup tip ensures minimal surface damage to shafts. Ideal for automotive, aerospace, and heavy machinery sectors, it combines high tensile strength with corrosion protection from the black-oxide finish, reducing maintenance frequency and downtime in demanding applications.

Specification Summary & Compliance

This set screw adheres to inch system dimensions with a 1"-14 UNS fine thread and Class 3A thread fit for precision tolerance. It conforms to ASME B18.3 and ASTM F912 manufacturing specifications, ensuring consistent thread geometry and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe industrial use.