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Black Stainless Steel Hex Flange Lock Nut DIN6923 M3–M12 A2-70 304 Serrated
Black Stainless Steel Hex Flange Lock Nut DIN6923 M3–M12 A2-70 304 Serrated
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Black Stainless Steel Hex Flange Lock Nut DIN6923 — M3–M12 A2-70 304 Serrated
Black 304 A2-70 stainless steel DIN6923 hex flange serrated lock nuts deliver the vibration-resistant performance of a serrated flange nut with a professional black finish for dark electronics builds, black anodised aluminium enclosures, and robotics assemblies where silver hardware would be visually inconsistent. The integrated serrated flange eliminates a separate lock washer while the A2-70 stainless base provides corrosion resistance superior to black carbon steel.
Key Specifications
| Parameter | Value |
|---|---|
| Material | 304 Stainless Steel |
| Grade | A2-70 |
| Finish | Black (black oxide / passivated) |
| Standard | DIN6923 / ISO 4161 |
| Thread Type | Metric coarse |
| Size Range | M3, M4, M5, M6, M8, M10, M12 |
| Flange | Integrated serrated (anti-loosening) |
Why Choose Black Stainless Flange Lock Nuts?
- Black finish on 304 SS — professional matte black appearance with corrosion resistance superior to black carbon steel; ideal for dark builds and outdoor use
- Serrated flange — bites into mating surface under torque; resists loosening under vibration without a separate lock washer
- A2-70 grade — minimum tensile strength 700 MPa; suitable for structural and load-bearing fastening
- DIN6923 standard — internationally specified; compatible with all standard metric coarse thread bolts M3–M12
- M3–M12 range — covers electronics (M3–M5) through structural mechanical assembly (M8–M12)
Typical Applications
- Black anodised aluminium electronics enclosure assembly (M3–M6)
- Dark PC case and chassis assembly (M3–M5)
- Robotics chassis and servo bracket mounting with black hardware (M3–M6)
- 3D printer frame assembly with black hardware aesthetic (M3–M5)
- Automotive and motorcycle component fastening (M6–M12)
- Industrial machinery and vibrating equipment (M6–M12)
Compatible With
- Standard metric coarse thread bolts and cap screws M3–M12
- Black hex socket cap screws and button head screws (matching black hardware set)
- Spanner / socket: M3=5.5mm, M4=7mm, M5=8mm, M6=10mm, M8=13mm, M10=17mm, M12=19mm AF
- Aluminium extrusion T-slot bolts (M3, M4, M5, M6)
Package Contents
- Black DIN6923 hex flange lock nuts in selected size and quantity (per variant)
Frequently Asked Questions
- Q: Is the black finish on 304 stainless more durable than black carbon steel nuts?
- A: Yes. Black passivated 304 stainless steel provides significantly better corrosion resistance than black oxide carbon steel. The 304 SS base is inherently corrosion-resistant, while carbon steel relies entirely on the black oxide coating which can chip or wear over time.
- Q: Can I pair these with black hex socket cap screws for a full black hardware set?
- A: Yes. These black flange lock nuts are designed to complement black hex socket cap screws, button head screws, and wafer head screws for a consistent all-black hardware aesthetic in electronics and robotics builds.
- Q: Do serrated flange nuts damage the mating surface?
- A: The serrations will mark the mating surface (metal panel or bracket) when tightened. This is intentional and necessary for the anti-loosening function. If the mating surface must not be marked (e.g., anodised aluminium), use a nyloc nut with a separate washer instead.
