S-93856A321 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing replacement frequency.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi minimum shear strength for reliable performance under heavy loads.
• Precise thread fit with Class 5g6g tolerance ensuring smooth assembly and secure fastening in mating components.
• Easy installation and removal thanks to the hex socket drive and knurled head, providing excellent grip and torque application.
• Accurate shoulder positioning with a diameter tolerance of -0.072 to -0.01 mm, enabling precise alignment in assemblies.
• Durable and hard-wearing material with Rockwell B55 hardness, resisting wear and deformation over time.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in various industries.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 18-8 Stainless Steel provides excellent corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions, thereby extending service life and reducing maintenance costs. The hex socket head and knurled texture facilitate easy tightening in confined spaces, while the coarse thread pitch (1.25mm) ensures quick assembly and high vibration resistance. Commonly used in rotating assemblies, pivots, and jigs, the precise shoulder diameter and Class 5g6g thread fit guarantee accurate alignment and minimal play, enhancing overall system reliability and performance in demanding industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M8 x 1.25mm coarse thread and Class 5g6g thread fit for precise dimensional accuracy. The shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is -0.05 to 0.05 mm, ensuring consistent quality. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.