S-91390A096 M2.5 x 5 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power with cup point design that bites into mating surfaces for superior resistance to vibration and loosening
• Exceptional durability provided by alloy steel construction with Rockwell C45 hardness, ensuring long-term performance under stress
• Precise installation and removal enabled by the 1.3 mm hex drive, allowing secure tool engagement in confined spaces
• Reliable coarse thread engagement with M2.5 x 0.45 mm pitch and Class 5g6g fit for quick assembly and reduced cross-threading risk
• Space-saving headless design ideal for applications where flush mounting or limited clearance is critical
• Guarded against environmental regulations with full RoHS 3 and REACH compliance for safe use in regulated industries
• Guaranteed interchangeability through strict adherence to DIN 916 and ISO 4029 standards for consistent quality and dimensions

Professional Applications & Engineering Value

This M2.5 metric set screw delivers critical performance in precision assemblies where reliable, headless fastening is non-negotiable. Manufactured from high-strength alloy steel and heat-treated to Rockwell C45, it resists wear and deformation in high-vibration environments like motor mounts, gear assemblies, and machinery adjustment points. The cup point tip concentrates pressure to create permanent seating marks, preventing rotational slip in pulleys, collars, and shafts. With its coarse thread pitch and Class 5g6g tolerance, it ensures rapid installation and robust thread engagement even in softer materials, while the compact 1.3 mm hex drive facilitates maintenance in tight spaces. Ideal for OEM and MRO applications across automotive, aerospace, and industrial equipment sectors.

Specification Summary & Compliance

This set screw features M2.5 x 0.45 mm coarse pitch threads with Class 5g6g fit per ISO metric standards, ensuring precise dimensional accuracy. It is manufactured in compliance with DIN 916 / ISO 4029 specifications for headless set screws with hex sockets. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming it is free of restricted hazardous substances. Material certification and dimensional conformity provide traceability for quality-critical applications.