Description:
Mushroom knobs with internal thread.

Material / Finish:
- Steel: Electro zinc-plated and trivalent blue passivated
- Stainless steel 1.4305: Fine turned or abrasive blasted, according to variant
- Stainless steel 1.4404: Bright or abrasive blasted, according to variant
- Aluminium: Natural tone anodised

Version:
- Internal thread

On Request:
- External threads

Variant:
- Main material: Stainless Steel 1.4305
- Surface finish: Abrasive Blasted

Dimensions:
- D: M4
- D1: 21 mm
- D2: 12 mm
- H: 21 mm
- H1: 10 mm
- T: 10 mm