S-91273A429 M8 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 smooth rotation thanks to the 20mm shoulder with tight diameter tolerance for reduced wear
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under load
• Easy installation and removal using the 4mm hex drive and knurled head for improved grip
• Accurate thread engagement ensured by Class 5g6g thread fit for secure fastening in metric assemblies
• Durable and long-lasting with Rockwell B55 hardness, resisting deformation in repetitive use
• Compliant with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for applications in humid or chemically aggressive settings. The 20mm shoulder length provides a precise bearing surface that maintains alignment in rotating parts, reducing friction and extending equipment life. With a coarse 1.25mm thread pitch and Class 5g6g thread fit, it ensures quick assembly and reliable holding power in metric systems. The knurled head and hex drive facilitate easy handling, even in tight spaces, enhancing efficiency in automation, manufacturing, and precision engineering projects.

Specification Summary & Compliance

This shoulder screw features a M8 x 1.25mm thread with Class 5g6g thread fit for standard metric applications. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring high dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.