S-91273A314 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Precise component alignment ensured by the 1/2" shoulder with tight diameter tolerance for reduced vibration and wear
• High-strength durability offering 70,000 psi tensile and 35,000 psi shear strength to withstand heavy loads and stress
• Secure and efficient installation via the hex socket drive and knurled head for improved grip and torque application
• Reliable thread engagement with UNC coarse threads and Class 2A fit for quick assembly and consistent fastening
• Compliance with environmental standards including RoHS 3 and REACH for safe use in regulated industries
• Versatile right-hand threading designed for standard machinery applications requiring robust fastening solutions

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 1/2" shoulder length provides a precise bearing surface for rotating components, minimizing misalignment and extending equipment life. With a Rockwell B55 hardness and 70,000 psi tensile strength, it resists deformation under high stress, making it ideal for heavy-duty machinery, automotive assemblies, and precision instruments. The hex socket head and knurled texture facilitate secure installation in confined spaces, while the UNC coarse threads ensure rapid assembly without compromising holding power. Its corrosion-resistant properties and compliance with RoHS 3 and REACH standards make it a reliable choice for applications demanding both mechanical integrity and environmental safety.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit tolerances for consistent engagement, with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" to ensure precision. Manufactured in accordance with UNC coarse thread standards, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, guaranteeing suitability for use in regulated industrial and engineering applications without hazardous substances.