Description:
Mushroom knobs with internal thread.

Material:
- Knob: Thermoset PF 31
- Bush: Brass, steel or stainless steel according to variant

Finish:
- Thermoset: Black, high-gloss polished
- Steel: Trivalent blue passivated
- Stainless steel: Bright

Notes:
- K1286.104 has a brass bush.

Variant:
- Component material: Brass

Dimensions:
- D: M4
- D1: 21 mm
- D2: 12 mm
- H: 21 mm
- H1: 10 mm
- T: 6 mm