S-91273A383 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 stainless steel ensures long-term reliability in harsh industrial environments, reducing maintenance and replacement costs.
• High tensile strength of 70,000 psi provides secure fastening under heavy loads, minimizing the risk of joint failure in critical assemblies.
• Knurled socket head with 2.5 mm hex drive offers superior grip and torque transmission, preventing tool slippage and speeding up installation.
• Class 5g6g thread fit with M5x0.8 coarse pitch guarantees precise engagement and easy assembly, reducing cross-threading and improving production efficiency.
• Rockwell B55 hardness enhances wear resistance and durability, extending the screw's service life in high-vibration applications.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, making it suitable for global supply chains and sensitive industries.
• 9.5 mm thread length with consistent shoulder dimensions provides accurate alignment and spacing in machined parts, improving overall assembly accuracy.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address common challenges in precision machinery, automation systems, and electronic enclosures where alignment and stability are critical. The 18-8 stainless steel construction offers excellent corrosion resistance, ideal for humid or chemically exposed environments, while the Rockwell B55 hardness ensures the screw maintains integrity under repetitive stress. The knurled socket head design enhances tool engagement, reducing installation errors in tight spaces. With a coarse thread pitch and Class 5g6g fit, it facilitates quick assembly without sacrificing precision, making it a reliable choice for industrial applications requiring high-strength, compliant fasteners.

Specification Summary & Compliance

This shoulder screw adheres to metric thread standards with M5x0.8 coarse pitch and Class 5g6g thread fit for consistent dimensional accuracy. Shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring precise fit in machined components. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.