S-95289A159 3/8"-16 x 5/8" 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
• Precise, secure fastening ensured by Class 3A thread fit for minimal backlash and reliable performance
• Enhanced durability with Rockwell B80 hardness, providing excellent wear resistance under repeated use
• Optimized torque transmission through the 3/16" hex drive, preventing tool slippage and damage
• Improved component alignment due to the extended tip design with tight diameter and length tolerances
• Broad compatibility with coarse UNC threads and right-hand direction for standard industrial applications
• Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global usage

Professional Applications & Engineering Value

This 3/8"-16 UNC hex headless set screw is engineered to solve critical alignment and retention challenges in machinery, automotive, and assembly systems. The 18-8 stainless steel material offers exceptional resistance to rust and chemical exposure, extending service life in demanding conditions. Its extended tip provides superior contact with components, reducing slippage and ensuring precise positioning. The Class 3A thread fit and coarse thread spacing enable quick installation and high clamping force, minimizing downtime in production lines. Ideal for securing gears, pulleys, and collars, this screw delivers reliable performance where vibration resistance and repeatability are paramount.

Specification Summary & Compliance

This set screw features a 3/8"-16 UNC thread size with Class 3A thread fit for high precision. Dimensions include a 5/8" length, 3/16" hex drive, and extended tip with diameter of 0.25" (tolerance: -0.009" to 0") and length of 0.198" (tolerance: -0.005" to 0"). It conforms to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.