S-92311A402 5/8"-18 x 3" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional thread engagement and vibration resistance provided by the fine UNF thread and precise Class 3A fit, ensuring a secure, reliable hold.
• High-strength performance with a Rockwell B80 hardness rating, offering excellent durability and resistance to wear under load.
• Secure, non-slip fastening enabled by the headless design and 5/16" hex drive, allowing for high torque application in confined spaces.
• Enhanced gripping power from the cup tip design, which minimizes surface damage while providing a firm, concentrated point of contact.
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring material safety and meeting global industry standards.
• Versatile right-hand thread design for standard installation and compatibility with a wide range of industrial components.

Professional Applications & Engineering Value

This 5/8"-18 UNF set screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in manufacturing, automotive, and marine sectors where environmental factors are a concern. The Class 3A thread fit and fine thread spacing ensure minimal backlash and superior clamping force, effectively preventing loosening in high-vibration environments. The headless design with a hex drive allows for flush mounting and easy access in tight spaces, while the cup tip concentrates pressure to secure components like gears, pulleys, and collars without causing significant surface marring. This combination of features delivers reliable, long-term performance for demanding industrial set screw applications.

Specification Summary & Compliance

This set screw features a 5/8"-18 UNF thread with a Class 3A fit for high precision and a 3" length. It is manufactured from 18-8 Stainless Steel with a Rockwell B80 hardness and complies with ASME B18.3 specifications. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.