S-91273A431 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Precise component alignment and smooth rotation thanks to the 25mm shoulder with a tight diameter tolerance of -0.04 to -0.01 mm.
• High-strength performance under load with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi.
• Secure and easy installation using a standard 4 mm hex socket drive and a knurled head for improved grip.
• Reliable coarse thread engagement with M8x1.25 Class 5g6g threads ensuring consistent fastening in various materials.
• Durable mechanical properties provided by Rockwell B55 hardness, resisting wear and deformation.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe and responsible sourcing.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and pivot point requirements in industrial assemblies. The 25mm shoulder length provides a precise bearing surface, eliminating the need for separate spacers or bushings and reducing assembly complexity. Manufactured from 18-8 Stainless Steel, it offers excellent corrosion resistance, making it suitable for machinery, automotive components, and electronic enclosures exposed to moisture or chemicals. The hex socket drive and knurled head ensure secure tool engagement and easy manual adjustment in confined spaces. With its Class 5g6g thread fit and coarse thread pitch, it delivers robust holding power and rapid installation, enhancing productivity in high-volume manufacturing and maintenance operations.

Specification Summary & Compliance

This precision shoulder screw features an M8x1.25 metric coarse thread with a Class 5g6g thread fit for standard applications. The shoulder diameter is manufactured to a tight tolerance of -0.04 to -0.01 mm, and the shoulder length has a tolerance of 0 to 0.25 mm, ensuring consistent dimensional accuracy. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.