S-97832A302 5/16"-24 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 extended service life.
• Exceptional thread reliability with Class 3A fit and UNF fine thread, ensuring precise, vibration-resistant assemblies and reduced risk of loosening.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding mechanical applications.
• Enhanced installation grip provided by the knurled socket head and hex drive, allowing for secure tool engagement and reduced slippage.
• Accurate shoulder positioning with a 3/8" diameter shoulder and tight length tolerance, enabling precise component alignment and spacing.
• Broad regulatory compliance meeting ASME B18.3 specifications, RoHS 3, and REACH, ensuring material safety and global acceptance.
• Optimized for right-hand thread applications with standard socket head profile, facilitating efficient assembly in common machinery and equipment.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and fastening challenges in industrial applications. The 5/16"-24 UNF fine thread with Class 3A fit provides superior resistance to vibration and fatigue, making it ideal for precision assemblies in machinery, automotive, and electronics where thread integrity is paramount. The 3/8" shoulder length and controlled diameter tolerance allow for exact component positioning, reducing wear and misalignment. Combined with a knurled socket head for secure hex drive engagement, this screw ensures reliable performance in high-stress environments, while its corrosion-resistant material and compliant standards support long-term durability and safety in regulated sectors.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNF thread standards, with precise shoulder diameter and length tolerances for consistent performance. Manufactured in compliance with ASME B18.3 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring environmental and health safety. The inch system measurements and fine thread spacing further support its use in standardized industrial designs.