S-91067A136 M4 x 25 mm DIN 551, ISO 4766 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Secure and precise fastening with Class 6g thread fit, providing consistent engagement and reducing the risk of loosening.
• Easy installation and adjustment using the standard slotted drive, compatible with common hand tools for quick assembly.
• Space-saving headless design allows for flush mounting in applications where protruding hardware is not feasible.
• Durable coarse thread pitch (0.7mm) enables faster installation and better performance in softer materials or where vibration is a concern.
• Flat tip design delivers concentrated clamping force, minimizing damage to shaft surfaces and improving grip.
• Compliance with international standards including DIN 551/ISO 4766, ensuring interchangeability and quality assurance.

Professional Applications & Engineering Value

These M4 set screws are engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Manufactured from 18-8 stainless steel, they provide excellent resistance to rust and oxidation, making them ideal for machinery, automotive assemblies, and outdoor equipment exposed to moisture. The headless and slotted design ensures a low-profile fit in tight spaces, while the right-hand coarse thread facilitates quick, secure fastening even in high-vibration environments. The flat tip concentrates force effectively, preventing damage to shafts and gears, which is critical in precision applications like motor mounts and coupling retention. By adhering to DIN 551 and ISO 4766 standards, these screws guarantee dimensional accuracy and reliability, reducing maintenance needs and downtime in B2B settings.

Specification Summary & Compliance

This metric set screw features an M4 x 0.7mm coarse thread with a Class 6g tolerance for precise fit, and a 25mm length with a flat tip. It conforms to DIN 551 (equivalent to ISO 4766) manufacturing specifications, ensuring consistent thread form and dimensional stability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe industrial use.