S-97832A299 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 mechanical strength with 70,000 psi tensile strength and 35,000 psi minimum shear strength, ensuring reliable performance under high-stress conditions.
• Precise alignment and smooth rotation provided by the 3/4" shoulder with standard fit, minimizing wear on mating components.
• Secure and non-slip installation enabled by the knurled socket head and 3/16" hex drive, allowing for high torque application without cam-out.
• Fine thread (UNF) with Class 3A fit offers superior vibration resistance and a tighter, more secure fastening in precision assemblies.
• Broad regulatory compliance including ASME B18.3, RoHS 3, and REACH, ensuring material safety and meeting global industry standards.
• Consistent dimensional accuracy with tight shoulder diameter and length tolerances, guaranteeing repeatable performance in automated or high-volume applications.

Professional Applications & Engineering Value

This 5/16"-24 UNF shoulder screw is engineered to address critical alignment and pivot point requirements in demanding assemblies. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in food processing, chemical equipment, and outdoor machinery where environmental factors are a concern. The 3/4" shoulder length acts as a precise datum for locating parts, such as in gears, pulleys, and linkages, reducing stress concentrations and preventing thread damage during repeated movement. The fine UNF thread and Class 3A fit ensure a secure, vibration-resistant connection, which is vital in automotive, aerospace, and precision instrumentation. The knurled socket head with a hex drive facilitates secure tool engagement, preventing slippage and enabling reliable installation in confined spaces, enhancing overall assembly integrity and reducing maintenance downtime.

Specification Summary & Compliance

This shoulder screw features a 5/16"-24 UNF fine thread with a Class 3A thread fit for high precision. The shoulder diameter is 3/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 3/4" with a tolerance of -0.005" to 0.005", ensuring consistent dimensional control. It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial use.