S-91390A151 M8 x 45 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with cup point design that bites into materials for exceptional resistance to loosening under vibration and load
• High-strength performance from alloy steel construction with Rockwell C45 hardness, providing excellent durability and wear resistance
• Precise thread engagement with Class 5g6g metric coarse threads ensuring reliable fit and consistent clamping force in demanding applications
• Easy installation and removal with 4mm hex drive that provides secure tool engagement and prevents stripping during torque application
• Space-saving headless design allowing for flush mounting in applications where protruding fastener heads are not feasible
• International standard compliance with DIN 916/ISO 4029 specifications guaranteeing interchangeability and quality assurance
• Environmental regulation compliance meeting RoHS 3 and REACH requirements for use in regulated industries and global markets

Professional Applications & Engineering Value

This M8 set screw delivers exceptional engineering value in applications requiring secure component positioning and torque transmission. The alloy steel construction with Rockwell C45 hardness provides the necessary strength to withstand high vibrational loads and repetitive stress, making it ideal for machinery, automotive assemblies, and industrial equipment. The cup point design creates concentrated pressure that digs into mating surfaces, effectively preventing slippage in pulleys, gears, and collars. With metric coarse threads (1.25mm pitch) and Class 5g6g thread fit, installation is straightforward while maintaining precise tolerance control. The headless configuration and 4mm hex drive make this fastener particularly valuable in confined spaces where traditional bolt heads would interfere with adjacent components.

Specification Summary & Compliance

This set screw features M8 x 1.25mm coarse metric threads with Class 5g6g tolerance according to ISO metric thread standards, ensuring precise dimensional accuracy. The fastener is manufactured to DIN 916/ISO 4029 specifications for dimensional consistency and performance reliability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and suitability for use in regulated industries across international markets.