M4 External Tooth Lockwashers / Steel / Black Oxide / DIN6797A
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Product Description
M4 External Tooth Lockwashers / Steel / Black Oxide / DIN6797A
Specifications
| Material | Steel |
|---|---|
| Finish | Black Oxide |
| Size | M4 |
| Inside Diameter | 4.1 mm |
| Outside Diameter | 7.6 mm |
| Thickness | 1 mm |
| Standard | DIN 6797A |
| RoHS Compliance | RoHS Compliant |
| Measurement System | Metric |
RoHS Compliant
Frequently Asked Questions
Are lock washers effective at preventing loosening?
Modern engineering testing shows split lock washers can actually reduce clamp load under vibration. For critical applications, use nylon insert lock nuts or thread locker (Loctite). Tooth lock washers (internal/external star) typically perform better than split washers in vibration-prone applications.
Does Black Oxide finish provide corrosion protection?
Black Oxide provides mild corrosion resistance through a controlled oxidation process. It is dimensionally stable (no plating buildup), will not chip or flake, and is suitable for indoor use. For outdoor or wet environments, additional oil coating or a different finish (zinc, stainless) is recommended.
External Tooth Lockwashers / Steel / Black Oxide
Family: D6797AB
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Technical Specifications
Thread Size
M4
Material
Steel
Thread Direction
Unthreaded
Outer Diameter
7.6 mm
Thickness
1 mm
SKU
M4D6797AB-10000