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Stainless Steel Knurled Thumb Nut GB806 M3–M10 A2-70 Double Step Hand Tighten Nut
Stainless Steel Knurled Thumb Nut GB806 M3–M10 A2-70 Double Step Hand Tighten Nut
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Stainless Steel Knurled Thumb Nut GB806 — M3–M10 A2-70 Double Step Hand Tighten Nut
304 A2-70 stainless steel GB806 knurled thumb nuts combine the tool-free convenience of a thumb nut with the corrosion resistance of A2-70 stainless steel — making them the correct choice for outdoor equipment, marine environments, food processing machinery, and any application where the silver zinc-plated version would corrode. The double-step knurled body provides a secure finger grip for frequent adjustment without tools.
Key Specifications
| Parameter | Value |
|---|---|
| Material | 304 Stainless Steel |
| Grade | A2-70 |
| Standard | GB806 |
| Body Style | Double step knurled cylinder |
| Thread Type | Metric coarse |
| Size Range | M3, M4, M5, M6, M8, M10 |
| Drive | Hand (tool-free) |
Why Choose Stainless Steel Thumb Nuts?
- A2-70 304 stainless — corrosion-resistant for outdoor, marine, food processing, and humid environments where zinc-plated carbon steel would rust
- Double step knurled body — ergonomic two-diameter profile for secure finger grip; easier to locate and turn than single-diameter knurled nuts
- Extended M3–M10 range — larger sizes (M8, M10) for heavier-duty outdoor and industrial adjustment applications
- Tool-free operation — hand-tighten and loosen without tools; ideal for frequent adjustment and quick-release applications
- GB806 standard — widely specified in 3D printing, jig, fixture, and outdoor equipment applications
Typical Applications
- Outdoor and marine equipment adjustment and quick-release fastening (M5–M10)
- 3D printer heated bed leveling in stainless steel builds (M3, M4)
- Food processing and pharmaceutical equipment panel adjustment (M4–M8)
- Glass curtain wall and glazing system adjustment (M5–M8)
- Laboratory and scientific instrument panel adjustment (M4–M6)
- Jig and fixture quick-release clamping in humid or outdoor environments (M5–M10)
Compatible With
- Standard metric coarse thread bolts and studs M3–M10
- Stainless steel threaded rod M3–M10
- 3D printer bed leveling springs and standoffs (M3, M4)
- Aluminium extrusion captive nut inserts (M3, M4, M5, M6)
Package Contents
- 304 A2-70 stainless steel GB806 knurled thumb nuts in selected size and quantity (per variant)
Frequently Asked Questions
- Q: Why choose stainless steel thumb nuts over silver zinc-plated ones?
- A: Zinc-plated carbon steel thumb nuts will rust in outdoor, marine, or humid environments. 304 A2-70 stainless steel provides inherent corrosion resistance without relying on a surface coating that can chip or wear. Choose stainless for any application exposed to moisture, salt, or chemicals.
- Q: What is the largest size available?
- A: The largest size is M10, suitable for heavier-duty outdoor and industrial adjustment applications such as large jig clamping, structural panel adjustment, and marine equipment fastening.
- Q: Can these be used in food processing equipment?
- A: Yes. 304 stainless steel is approved for food contact applications (FDA, EU food contact regulations). These thumb nuts are suitable for food processing machinery, pharmaceutical equipment, and clean-room environments where corrosion resistance and hygiene are required.
