S-97345A528 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial and marine environments
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, high-stress applications
• Precision Class 3A thread fit ensures consistent, secure fastening with minimal backlash in assemblies
• Knurled socket head with 5/32" hex drive provides superior grip and torque transmission, reducing tool slippage
• Stable shoulder design with precise diameter and length tolerances for accurate component alignment and pivot functions
• Compliance with ASME B18.3 guarantees dimensional consistency and interchangeability in professional settings
• RoHS 3 and REACH compliant for safe use in regulated industries and global market acceptance

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw in 316 Stainless Steel is engineered to address critical alignment and pivot challenges in machinery, automation, and precision equipment. The coarse thread and Class 3A fit provide rapid assembly with high vibration resistance, while the precisely machined shoulder acts as a durable axle or spacer, eliminating the need for additional bushings. The knurled socket head enhances torque application, reducing installation errors in confined spaces. Ideal for mounting gears, linkages, and rotating assemblies, this screw ensures long-term reliability in corrosive or high-load environments, minimizing maintenance and downtime.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for tight tolerances and UNC coarse threading. The shoulder diameter and length are manufactured to precise tolerances (e.g., shoulder diameter: -0.004" to -0.002"). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory acceptance for industrial and export use.