S-92981A312 M8 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in demanding applications.
• Superior corrosion resistance provided by the black oxide finish, extending service life in various industrial environments.
• Precise alignment and smooth rotation ensured by the 90mm shoulder with tight diameter tolerance for reduced wear on mating components.
• High-strength alloy steel construction with Rockwell C32 hardness offers excellent durability and resistance to deformation.
• Secure and efficient installation with the 5mm hex socket drive, allowing for high torque application without slippage.
• Reliable thread engagement with Class 5g6g thread fit and coarse M8x1.25mm threads for quick assembly and vibration resistance.
• Global compliance assurance meeting ISO 7379, RoHS 3, and REACH standards for quality and environmental safety.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and high-stress challenges in precision machinery. The alloy steel core, hardened to Rockwell C32, provides the structural integrity needed for repetitive load cycles, while the black oxide finish adds a protective layer against rust in humid or abrasive settings. The extended 90mm shoulder length with minimal diameter tolerance acts as a precise pivot or axle, reducing bushing wear and maintaining component alignment in assemblies like conveyor systems, robotic arms, and automotive jigs. Its metric socket head design ensures flush mounting and easy access in confined spaces, making it ideal for industrial applications where reliability and dimensional accuracy are paramount.

Specification Summary & Compliance

This shoulder screw features an M8x1.25mm coarse thread with Class 5g6g fit per ISO standards, ensuring consistent engagement. The shoulder diameter is tightly controlled at 10mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 90mm with a 0 to 0.25 mm tolerance. Manufactured in compliance with ISO 7379, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global markets and sustainable practices.