S-91273A791 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Corrosion Resistance: 18-8 Stainless Steel with Black Oxide finish provides superior protection against rust and degradation in harsh industrial environments.
• High Tensile & Shear Strength: With 70,000 psi tensile strength and 35,000 psi minimum shear strength, this screw ensures reliable, heavy-duty performance under significant stress.
• Precision Shoulder for Accurate Alignment: The 5mm diameter shoulder with tight tolerance (-0.04 to -0.01 mm) guarantees exact component positioning and reduces wear.
• Secure Hex Drive Installation: The 2.5 mm hex socket drive and knurled head allow for high-torque application and prevent slipping during assembly.
• Coarse Thread for Quick Assembly: M5x0.8 coarse thread with Class 5g6g fit enables fast, secure fastening and reduces cross-threading risks.
• Durable Material Hardness: Rockwell B55 hardness ensures the screw maintains its structural integrity and resists deformation over repeated use.
• Compliant with Global Safety Standards: Meets RoHS 3 and REACH regulations, ensuring safe use in various industrial applications without hazardous substances.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 Stainless Steel construction, combined with a Black Oxide finish, offers excellent corrosion resistance, making it ideal for environments exposed to moisture or chemicals. The 5mm shoulder diameter with minimal tolerance ensures precise component location, reducing vibration and misalignment in assemblies such as rotating shafts, gears, and electronic enclosures. The coarse metric thread (M5x0.8) and Class 5g6g thread fit facilitate quick installation while maintaining secure fastening, minimizing assembly time and improving productivity in automated or manual settings. With a 9.5mm thread length and socket head design, it provides reliable performance in confined spaces, supporting applications in robotics, automotive systems, and industrial equipment where strength and precision are paramount.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with precise dimensions: M5x0.8 thread with Class 5g6g thread fit, ensuring consistent performance and interchangeability. The shoulder features a diameter of 5 mm with a tolerance of -0.04 to -0.01 mm and a length of 5 mm with a tolerance of 0 to 0.25 mm, providing exacting alignment. Manufactured from 18-8 Stainless Steel and finished with Black Oxide, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial use without restricted substances.