S-90298A752 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
• Precise alignment and smooth rotation due to the 1/2" shoulder diameter with tight ±0.001" tolerance
• High-strength, wear-resistant construction with Rockwell B55 hardness for extended service life under load
• Reliable, vibration-resistant fastening from Class 3A thread fit and coarse 3/8"-16 UNC threads
• Easy installation and removal with hex drive and knurled head for secure tool grip
• Consistent dimensional accuracy ensured by compliance with ASME B18.3 manufacturing standards
• Environmentally safe for global use with RoHS 3 and REACH compliance, meeting international regulations

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automated systems, and precision equipment. The 3/8"-16 UNC coarse thread with Class 3A fit ensures secure fastening even under vibration, while the precisely machined 1/2" shoulder diameter provides accurate component positioning and reduces wear on moving parts. The passivated finish enhances corrosion resistance, making it suitable for demanding environments where moisture or chemicals are present. Combined with a hex drive and knurled head for easy handling, this screw minimizes assembly time and maintenance, delivering long-term reliability in applications like pivots, axles, and guides.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 3A thread fit for precise engagement, and a shoulder diameter tolerance of -0.001" to 0.001" for consistent alignment. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for industrial use.