S-90298A824 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and passivated finish for reliable performance in harsh industrial environments.
• Precise alignment and reduced wear due to tight shoulder tolerances (±0.001" diameter, ±0.005" length) ensuring consistent component positioning.
• High-strength durability with Rockwell B55 hardness, providing excellent resistance to deformation under heavy loads.
• Secure, high-torque installation enabled by the hex socket drive and knurled head, preventing slippage during assembly.
• Reliable thread engagement with Class 3A UNC coarse threads, offering superior fit and vibration resistance in dynamic applications.
• Long-lasting performance in machinery and fixtures, supported by compliance with ASME B18.3 standards for dimensional accuracy.
• Environmentally safe usage as it meets RoHS 3 and REACH regulations, ensuring no hazardous substances in production.

Professional Applications & Engineering Value

This socket head shoulder screw is engineered to address critical alignment and durability challenges in precision industrial applications, such as machinery assemblies, pivoting mechanisms, and automated equipment. The 18-8 stainless steel construction, combined with a passivated finish, provides superior corrosion resistance, reducing maintenance needs in humid or chemically exposed settings. The 3 1/4" shoulder length and tight diameter tolerances ensure exact positioning of moving parts, minimizing wear and preventing misalignment. With a Class 3A thread fit and UNC coarse threads, it delivers secure fastening even under high vibration, making it ideal for heavy-duty applications where reliability is paramount. The hex drive and knurled head further enhance installation efficiency, allowing for quick, tool-friendly assembly without compromising integrity.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional precision with a Class 3A thread fit for superior engagement. The shoulder features tight tolerances: diameter within ±0.001" and length within ±0.005". It is manufactured from 18-8 stainless steel with a passivated finish and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming environmental safety and regulatory adherence.