S-91390A686 M20 x 30 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power from the cup tip design that creates deep, secure engagement with mating components
• Superior resistance to vibration and loosening due to the extra fine 1.5mm thread pitch for a tighter, more precise fit
• Exceptional strength and durability provided by the alloy steel construction and Rockwell C45 hardness rating
• Easy and secure installation with the 10mm hex drive, allowing for high torque application in confined, headless designs
• Guanteed dimensional accuracy and interchangeability through compliance with the stringent DIN 916 and ISO 4029 standards
• Reliable performance in sensitive applications with full compliance to RoHS 3 and REACH environmental regulations
• Precise thread fit for demanding assemblies ensured by the Class 5g6g tolerance, minimizing the risk of cross-threading

Professional Applications & Engineering Value

This M20 set screw is engineered to solve critical challenges in precision machinery and industrial equipment. The alloy steel material, hardened to Rockwell C45, provides the necessary core strength to resist shear forces and permanent deformation in high-stress applications like gear hubs, pulleys, and coupling assemblies. The extra fine metric thread with a 1.5mm pitch offers a significantly increased number of threads per unit length compared to standard pitches. This results in a finer adjustment capability and dramatically improves resistance to vibrational loosening, a common failure point in rotating equipment. The headless and hex drive design is ideal for space-constrained applications where a flush surface is required, ensuring components remain securely locked in place without protruding hardware.

Specification Summary & Compliance

This set screw conforms to the dimensional and mechanical specifications of DIN 916 and ISO 4029. The metric thread is manufactured to a Class 5g6g tolerance for a consistently precise fit. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental and safety standards for industrial components.