S-90251A323 M8 x 25 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch locking technology, ensuring secure fastening in high-stress environments
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh or humid industrial settings
• High mechanical strength with Rockwell B80 hardness, providing reliable load-bearing capacity and durability
• Secure internal drive via 4 mm hex socket, enabling precise torque application and reducing tool slippage
• Wide temperature tolerance from -50° to 250°F, maintaining locking performance in extreme thermal conditions
• Accurate coarse threading with Class 6g fit and M8 x 1.25mm pitch, ensuring quick installation and consistent engagement
• Optimized cup tip design for concentrated contact pressure, minimizing component damage during clamping

Professional Applications & Engineering Value

This M8 nylon patch locking set screw is engineered to address critical challenges in machinery assembly, automotive systems, and precision equipment where vibration-induced loosening compromises safety and performance. The 18-8 stainless steel base material offers excellent resistance to oxidation and chemical exposure, while the integrated nylon patch thread locker creates a durable, reusable friction fit that eliminates the need for separate adhesives. Its headless design and hex socket drive allow for flush mounting in confined spaces, making it ideal for securing gears, pulleys, and couplings without protruding hardware. Compliant with DIN 916 and ISO 4029 standards, this metric set screw delivers reliable torque transmission and long-term service life in demanding industrial applications.

Specification Summary & Compliance

This set screw features M8 x 1.25mm coarse threads with a Class 6g tolerance for precise fit, manufactured in accordance with DIN 916 (equivalent to ISO 4029). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The nylon patch locking system operates effectively within a temperature range of -50° to 250°F, and the Rockwell B80 hardness confirms consistent mechanical properties under load.