S-92311A581 5/16"-18 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments
• Maximum holding power and vibration resistance due to the cup point design that bites into shafts
• Precise Class 3A thread fit ensures reliable, secure fastening with minimal backlash
• High durability with Rockwell B80 hardness for long service life under mechanical stress
• Easy installation in confined spaces using the 5/32" hex drive headless design
• Broad industrial compatibility with UNC coarse threads for quick assembly
• Compliance with global standards including ASME B18.3, RoHS 3, and REACH for safe use

Professional Applications & Engineering Value

This 5/16"-18 UNC Class 3A set screw is engineered to address critical challenges in industrial assembly, such as component slippage and corrosion-induced failure. The 18-8 stainless steel material provides excellent resistance to rust and chemicals, extending the lifespan of equipment in demanding settings like machinery, automotive, and marine applications. Its hex headless and cup point design allows for deep embedding into shafts or collars, preventing rotational movement even under high vibration. With a coarse thread spacing and right-hand thread direction, it ensures rapid installation and reliable performance in dynamic environments, reducing maintenance downtime and enhancing operational safety.

Specification Summary & Compliance

This set screw features a Class 3A thread fit for high precision and adherence to ASME B18.3 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Key dimensions include a 5/16"-18 UNC thread size, 0.313" thread diameter, 3/4" length, and 5/32" drive size, all manufactured to meet industrial standards for reliability and consistency.