S-90298A712 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 for long-lasting performance in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness to withstand high-stress applications
• Precision alignment and smooth rotation ensured by the 1/2" shoulder diameter with tight ±0.001" tolerance
• Reliable, vibration-resistant fastening due to Class 3A thread fit and coarse UNC thread spacing
• Easy installation and removal with hex socket drive and knurled head for enhanced grip
• Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, regulated use
• Durable, maintenance-free operation from the right-hand thread and standard shoulder fit, reducing replacement needs

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 stainless steel construction, enhanced by a passivated finish, provides excellent resistance to corrosion and wear, making it ideal for environments exposed to moisture or chemicals. The 1/2" shoulder diameter with minimal tolerance ensures precise component positioning in assemblies like rotating shafts, pulleys, and gears, reducing misalignment and wear. With a Class 3A thread fit and coarse thread spacing, it offers secure, vibration-resistant fastening in high-load applications, from automotive systems to conveyor equipment. The socket head with hex drive and knurled texture allows for easy torque application in confined spaces, improving assembly efficiency and reliability in industrial shoulder screw uses.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with UNC coarse threads, ensuring tight tolerances for reliable engagement. Dimensions include a shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005", providing high precision for alignment-critical applications. It is manufactured in compliance with ASME B18.3 specifications and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming its suitability for regulated industrial and electronic uses without hazardous substances.