Description:
Knurled knobs biopolymer, internal or external thread.

Material:
- Biopolymer, beech
- bush or threaded pin steel 5.8.

Version:
- Steel blue passivated
- natural beech with beech fibres or coloured black grey according to variant.
- Advantages: Manufactured entirely from renewable raw materials (oil free), conserving finite fossil resources. Wood fibres originate 100% from local, sustainably managed forests in Germany.
- Features: Excellent mechanical stability, certified with a minimum 2x safety factor
- suitable for recycling comparable to thermoplastics
- suitable for outdoor use and not biodegradable
- excellent resistance to strong acids and lyes
- short-term resistance to alcohol, fuel, mineral oil and grease.

Variant:
- Internal thread
- main colour natural beech. Dimensions: Thread D: M4
- D1: 21 mm
- D2: 14 mm
- D3: 19 mm
- H: 22 mm
- H1: 8 mm
- T: 10 mm.