S-97832A304 5/16"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Superior load-bearing capacity with a high tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for reliable performance under stress.
• Precise alignment and location ensured by the 1 3/4" shoulder length with tight tolerances, minimizing part movement and wear.
• Secure, fine-thread engagement with the Class 3A UNF thread fit, providing excellent vibration resistance and holding power.
• Easy installation and removal using a standard 3/16" hex drive and a knurled head for enhanced grip, even in confined spaces.
• Guaranteed material integrity with a Rockwell B55 hardness, offering a robust balance of strength and ductility.
• Compliance with global standards, meeting ASME B18.3 specifications and being RoHS 3 and REACH compliant for safe, regulated use.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and fastening challenges in demanding industrial applications. The 5/16"-24 UNF fine thread with a Class 3A fit ensures a tight, secure connection that resists loosening under vibration, making it ideal for machinery, precision assemblies, and rotating equipment. The unthreaded shoulder acts as a precise pivot, bearing surface, or axle, preventing axial movement and reducing wear on mating parts. The knurled head and socket drive facilitate quick assembly and disassembly, while the corrosion-resistant material ensures long-term durability and reliability, even in challenging environments. This combination of precision, strength, and compliance delivers exceptional engineering value for OEMs and maintenance operations.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit for high precision, a shoulder diameter of 3/8" with a tolerance of -0.004" to -0.002", and a shoulder length of 1 3/4" with a tolerance of -0.005" to 0.005". It conforms to the ASME B18.3 standard for dimensional consistency and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.