S-91375A295 9/16"-12 x 1 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant assemblies in demanding applications.
• Enhanced corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• High-strength durability backed by Rockwell C45 hardness, ensuring the set screw maintains its form under heavy loads.
• Secure, flush installation with a headless hex drive design, ideal for applications where a protruding head is not feasible.
• Efficient, deep engagement due to the 9/16"-12 UNC coarse thread, allowing for quicker installation and robust fastening.
• Reliable, non-slip fastening provided by the cup tip, which bites into the shaft for a firm, permanent grip.
• Broad compliance and safety meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental responsibility.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Set Screw is engineered to address critical challenges in industrial machinery, automotive, and heavy equipment sectors. Its headless design with a hex drive ensures a flush fit, preventing interference in compact assemblies while the UNC coarse thread and Class 3A fit deliver exceptional resistance to loosening under vibration and dynamic loads. The cup tip provides superior biting action on shafts and collars, making it ideal for permanent positioning tasks. Combined with Rockwell C45 hardness, this screw offers reliable performance in high-stress applications, reducing maintenance needs and enhancing operational safety. Its compliance with ASME B18.3 standards guarantees consistency and interoperability in professional settings.

Specification Summary & Compliance

This set screw features a 9/16"-12 UNC thread with coarse spacing and Class 3A precision fit for tight tolerances and reliable engagement. It is manufactured from alloy steel with a black-oxide surface treatment and meets ASME B18.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.