S-91390A578 M24 x 40 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point design that bites into mating surfaces for maximum resistance against loosening under vibration
• Exceptional durability from Rockwell C45 hardened alloy steel that maintains thread integrity and resists wear in demanding applications
• Precise thread engagement with Class 5g6g metric coarse threads ensuring reliable fastening and easy assembly in industrial equipment
• High-torque installation capability through 12mm hex drive that prevents tool slippage and enables secure tightening in confined spaces
• Space-saving headless design allowing flush mounting where protruding fastener heads would interfere with mechanical operation
• International compliance assurance meeting DIN 916/ISO 4029 specifications for guaranteed dimensional accuracy and performance consistency
• Environmentally responsible manufacturing with full RoHS 3 and REACH compliance for safe use across global industrial markets

Professional Applications & Engineering Value

This M24 set screw delivers critical engineering solutions where component slippage can cause equipment failure. The alloy steel construction with Rockwell C45 hardness provides the necessary strength to maintain positional integrity in high-stress assemblies, while the cup point design creates permanent seating in shafts, collars, and gears. The metric coarse thread (3mm pitch) with Class 5g6g tolerance ensures rapid installation without compromising holding power in production environments. The headless hex drive configuration makes it ideal for machinery where rotating components must clear adjacent structures, while the 12mm drive size accommodates standard industrial tools. These set screws are particularly valuable in power transmission systems, manufacturing equipment, and precision mechanisms requiring reliable component fixation.

Specification Summary & Compliance

This fastener features M24 x 3mm metric coarse threads manufactured to Class 5g6g tolerance per ISO standards, ensuring precise fit and reliable performance. The 40mm length provides optimal engagement depth for most industrial applications. Manufacturing complies with DIN 916 and ISO 4029 specifications for dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substances.