S-92558A360 M4 x 20 mm DIN 464 Thumb Screws

Key Features & Benefits at a Glance

• Enhanced tool-free operation with a 16 mm knurled round head for superior grip and easy hand tightening/loosening
• Exceptional corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh industrial environments
• High mechanical strength and durability with 80,000 psi tensile strength and Rockwell B83 hardness for reliable, long-term performance
• Optimized for quick assembly with a coarse M4 x 0.7 mm thread and full threading for faster engagement and secure fastening
• Precise and reliable fit ensured by Class 6g thread tolerance, reducing the risk of cross-threading and assembly errors
• Broad regulatory compliance meeting DIN 464 standards, RoHS 3, and REACH for safe use in various markets and applications
• Stable raised head profile with an 8 mm collar diameter for increased bearing surface and improved alignment during installation

Professional Applications & Engineering Value

This M4 thumb screw is engineered to solve common assembly challenges in industrial settings where frequent adjustments or tool-less access is required. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for electronics enclosures, machinery panels, and outdoor equipment. The knurled round head and coarse metric thread enable rapid manual installation without specialized tools, reducing assembly time and minimizing the risk of damage to components. Its fully threaded design and Class 6g thread fit ensure consistent clamping force and vibration resistance, which is critical in applications subject to dynamic loads. By integrating a raised head with a collar, this screw offers enhanced stability, preventing over-tightening and distributing pressure evenly, thereby protecting sensitive surfaces and extending the life of the assembly.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional and performance criteria, including a 20 mm length, M4 x 0.7 mm coarse thread with Class 6g tolerance, and a right-hand thread direction. It is manufactured in compliance with DIN 464 specifications, ensuring interchangeability and reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming the absence of hazardous substances and supporting its use in environmentally conscious and regulated industries.