S-90251A322 M8 x 20 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
- Permanent vibration resistance with nylon patch locking that maintains secure fastening under high-stress conditions
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Reliable high-temperature performance with a locking temperature range of -50° to 250°F
- Precise thread engagement with Class 6g fit and coarse 1.25mm pitch for quick installation and strong holding power
- Durable mechanical properties with Rockwell B80 hardness ensuring long-term wear resistance
- Secure hex socket drive with 4mm drive size providing excellent torque transmission and slip resistance
- Full regulatory compliance meeting DIN 916/ISO 4029 standards plus RoHS 3 and REACH environmental directives
Professional Applications & Engineering Value
This M8 nylon patch locking set screw delivers critical vibration resistance in demanding applications where loosening under dynamic loads poses significant safety and performance risks. The 18-8 stainless steel construction provides essential corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements, while the coarse thread pitch (1.25mm) ensures rapid installation and reliable clamping force in production environments. The permanent nylon patch locking technology creates consistent friction that eliminates the need for secondary locking mechanisms, simplifying assembly processes in automotive components, industrial equipment, and precision machinery. With its headless design and hex socket drive, it offers flush mounting where space constraints exist, making it ideal for shaft collars, gears, and pulleys requiring secure positional locking.
Specification Summary & Compliance
Manufactured to DIN 916 (equivalent to ISO 4029) specifications with Class 6g thread fit tolerance ensuring precise dimensional accuracy. The metric coarse thread (M8 x 1.25mm) provides optimal engagement strength, while the 20mm length offers versatile application coverage. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage across regulated industries, supported by material certifications and manufacturing traceability.
