S-91273A478 M12 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding applications requiring robust load-bearing capabilities.
• Precise alignment and spacing enabled by the 90mm shoulder with tight diameter and length tolerances, reducing assembly errors and improving component fit.
• Secure and easy installation thanks to the knurled socket head and 6mm hex drive, providing enhanced grip and torque transmission without slippage.
• Reliable thread performance with Class 5g6g metric coarse thread (M12x1.75), ensuring consistent engagement and vibration resistance in right-hand applications.
• Durable surface and structure with Rockwell B55 hardness, maintaining integrity under repeated use and mechanical stress.
• Compliance with environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and global supply chains.

Professional Applications & Engineering Value

This M12 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and assembly jigs. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, ideal for food processing, medical equipment, and outdoor applications. The 90mm shoulder length with minimal tolerances ensures accurate positioning of moving parts, reducing wear and misalignment. Combined with the knurled socket head and hex drive, it allows for quick, secure fastening in confined spaces, enhancing productivity and reducing maintenance downtime in high-cycle industrial environments.

Specification Summary & Compliance

This metric shoulder screw adheres to Class 5g6g thread fit standards, with shoulder diameter tolerance of -0.04 to -0.01 mm and length tolerance of 0 to 0.25 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The coarse thread (M12x1.75) and right-hand thread direction follow common industrial specifications for reliable performance in various mechanical assemblies.