S-97345A584 1/4"-28 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments and extending component lifespan.
• High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash, enhancing assembly integrity.
• Efficient torque transmission via the knurled socket head and 3/16" hex drive, reducing tool slippage and installation time.
• Accurate shoulder positioning with a 3/8" diameter and controlled tolerances, providing stable alignment for rotating parts.
• Durable material hardness rated at Rockwell B79, resisting wear and deformation under repeated use.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining alignment in rotating machinery and reducing wear in high-stress joints. The Class 3A UNF fine thread and knurled socket head with a 3/16" hex drive deliver secure fastening and efficient torque application, minimizing the risk of stripping or loosening. Its corrosion-resistant properties make it suitable for applications in chemical processing, marine equipment, and food machinery, where durability and hygiene are paramount. By integrating a precision shoulder with tight tolerances, it supports accurate component positioning, enhancing overall system reliability and reducing maintenance needs in industrial fastening solutions.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision and a shoulder diameter tolerance of -0.004" to -0.002". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use. The UNF fine thread and right-hand direction provide reliable engagement, backed by a tensile strength of 70,000 psi and shear strength of 35,000 psi for robust performance.