S-97832A257 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing replacement frequency.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing in demanding applications.
• Precise alignment and smooth rotation enabled by the 3/4" shoulder diameter with tight tolerance, minimizing wear on mating parts.
• Secure and easy installation with a 3/8" hex socket drive and knurled head, providing excellent grip and torque transmission.
• Consistent thread engagement through Class 3A thread fit and 5/8"-11 UNC coarse threads, ensuring vibration resistance and assembly reliability.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing quality and environmental safety for global supply chains.
• Durable material hardness rated at Rockwell B55, maintaining structural integrity under repeated stress and extending service life.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial applications such as machinery assemblies, pivoting mechanisms, and precision equipment. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, reducing maintenance costs in humid or chemically exposed settings. The 3/4" shoulder diameter with controlled tolerance ensures precise locating and smooth rotational movement, preventing misalignment and part wear. Combined with a Class 3A thread fit and coarse UNC threads, it offers secure fastening that withstands vibrations and dynamic loads. The socket head with knurled texture and 3/8" hex drive facilitates easy installation in confined spaces, enhancing assembly efficiency. Ideal for use in automotive, aerospace, and manufacturing sectors, this screw delivers reliable performance where precision and strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. Threads are manufactured to Class 3A fit with 5/8"-11 UNC coarse thread profile, providing tight tolerances for secure assembly. The shoulder features a diameter of 3/4" with tolerance of -0.004" to -0.002" and length of 1 3/8" with tolerance of -0.005" to 0.005", guaranteeing precise engineering fits. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial components.