S-91375A806 5/8"-11 x 3" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for reliable, vibration-resistant fastening in demanding applications.
• Enhanced corrosion resistance from the black-oxide finish, extending service life in harsh industrial environments.
• High-strength durability provided by alloy steel and Rockwell C45 hardness, resisting wear and deformation under heavy loads.
• Secure and flush installation with a headless design and cup tip, preventing component interference and improving safety.
• Easy installation and removal using the 5/16" hex drive, allowing for high torque application with standard tools.
• Optimal engagement in soft materials due to coarse UNC threads, ensuring quick assembly and strong grip.
• Broad industrial compatibility with right-hand threading, making it a versatile choice for various machinery and equipment.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address critical challenges in industrial settings, such as component slippage and corrosion-induced failure. The 5/8"-11 UNC coarse thread with Class 3A fit ensures maximum clamping force and vibration resistance, ideal for securing pulleys, gears, and collars on shafts. The headless design and cup tip provide a flush finish, reducing the risk of entanglement in moving parts. Made from high-strength alloy steel with a Rockwell C45 hardness, it withstands heavy rotational forces and repetitive stress, while the black-oxide surface treatment offers added protection against rust and wear in moist or abrasive environments. This makes it a reliable choice for automotive, manufacturing, and heavy machinery applications where precision and longevity are paramount.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including UNC coarse threads with a Class 3A fit for tight tolerances and consistent performance. It meets ASME B18.3 specifications, ensuring manufacturing quality and interchangeability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting safe, environmentally responsible industrial use.