S-91390A540 M5 x 40 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through Class 5g6g thread fit and coarse 0.8mm pitch design
• Exceptional holding power provided by the hardened cup point that creates permanent seating
• Long-term durability ensured by Rockwell C45 hardened alloy steel construction
• Easy installation and removal with standard 2.5mm hex drive compatibility
• Reliable industrial performance backed by DIN 916/ISO 4029 certification
• Environmental compliance meeting RoHS 3 and REACH regulations for global applications
• Space-saving design with headless configuration for compact assemblies

Professional Applications & Engineering Value

These M5 set screws deliver critical engineering solutions where vibration resistance and permanent positioning are paramount. The alloy steel construction, hardened to Rockwell C45, provides exceptional shear strength while the cup point design bites into mating surfaces to prevent rotational movement under dynamic loads. The coarse 0.8mm pitch threads with Class 5g6g fit maintain clamping force in high-vibration environments common to industrial machinery, automotive components, and precision equipment. The headless configuration with 2.5mm hex drive allows installation in confined spaces where traditional fasteners cannot be used, making these metric set screws ideal for shafts, collars, and pulleys requiring secure, flush-mounted fastening solutions.

Specification Summary & Compliance

This M5x0.8x40mm set screw features precision Class 5g6g thread fit according to metric standards with right-hand threading. Manufactured to DIN 916/ISO 4029 specifications with Rockwell C45 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use worldwide.