S-91273A353 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise alignment and reduced wear due to the 3/8" shoulder length with tight tolerances for stable component positioning
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Reliable fastening ensured by Class 2A thread fit and UNC coarse thread for quick assembly and vibration resistance
• Easy installation and removal with a hex socket drive and knurled head for improved grip and torque application
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility
• Durable and long-lasting thanks to Rockwell B55 hardness, providing excellent wear resistance

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, component slippage, and corrosion in precision assemblies. The 1/4"-20 UNC coarse thread and 3/8" shoulder length with controlled tolerances ensure accurate positioning in machinery, pivots, and rotating parts, reducing wear and maintenance costs. The socket head with hex drive allows for secure tightening in confined spaces, while the knurled texture enhances handling during installation. Ideal for applications in automation, automotive, and electronics, this screw provides reliable performance in high-stress environments, supported by its high tensile and shear strength.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNC thread standards for dimensional accuracy, with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". 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.