S-91979A681 M2.5 x 4 mm 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
- Secure anti-loosening performance with right-hand coarse threads providing reliable holding power in dynamic applications
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Precision thread engagement with Class 6g tolerance ensuring consistent fit and reduced assembly issues
- Space-saving headless design allowing flush mounting where protruding fasteners aren't feasible
- Enhanced installation control through 1.3mm hex drive providing positive torque application
- Optimized pressure distribution with cup tip design minimizing surface damage during clamping
- Pressure equalization capability via 1mm vent diameter preventing air or fluid lock during installation
Professional Applications & Engineering Value
This M2.5 metric set screw delivers exceptional engineering value in precision assembly applications where space constraints and corrosion resistance are critical. The 18-8 stainless steel construction provides excellent durability in demanding environments while the hex headless design enables flush mounting in tight spaces. The coarse thread pitch (0.45mm) ensures rapid installation and secure fastening in materials where fine threads might strip. The innovative vented design with 1mm diameter prevents pressure buildup during insertion, making it ideal for sealed assemblies and precision equipment. With Class 6g thread fit and right-hand threading, this set screw offers reliable performance in industrial machinery, electronic enclosures, and automotive components requiring repeated adjustments.
Specification Summary & Compliance
This precision fastener features M2.5 thread size with 0.45mm coarse pitch and 4mm length, manufactured to Class 6g thread tolerance per metric standards. The screw incorporates a hex drive (1.3mm), cup tip, and 1mm vent diameter for specialized applications. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets requiring restricted substance control.
