S-91390A139 M8 x 8 mm DIN 916, ISO 4029 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior holding power through Rockwell C45 hardened alloy steel construction, ensuring exceptional resistance to wear and deformation in demanding applications
- Precise thread engagement with Class 5g6g tolerance for reliable, vibration-resistant fastening without loosening over time
- Optimized cup tip design provides concentrated contact pressure, minimizing surface damage and improving grip on shafts and components
- Convenient 4mm hex drive allows for easy installation and removal with standard tools, reducing assembly time and labor costs
- Coarse M8 x 1.25mm thread enables quick installation and strong holding in a variety of materials, enhancing operational efficiency
- Compliance with DIN 916/ISO 4029 standards guarantees consistent quality, interchangeability, and reliability across industrial applications
- RoHS 3 and REACH compliant for safe use in regulated environments, supporting sustainability and regulatory adherence
Professional Applications & Engineering Value
This M8 set screw is engineered to address critical challenges in industrial assemblies where vibration resistance and secure positioning are paramount. The alloy steel material, hardened to Rockwell C45, provides excellent tensile strength and durability, preventing failure under high stress. The headless hex design with a 4mm drive and cup tip ensures flush mounting and concentrated clamping force, ideal for securing pulleys, gears, and collars on shafts without protruding parts. Its coarse metric thread and Class 5g6g precision facilitate easy alignment and robust fastening in machinery, automotive, and equipment manufacturing, reducing maintenance needs and enhancing operational reliability.
Specification Summary & Compliance
This set screw adheres to DIN 916 and ISO 4029 standards, with M8 x 1.25mm coarse threads and Class 5g6g thread fit for precise dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory conformity in industrial use.
