Specification for Knob wing; M8; 20mm; polyamide; H: 28mm; black; Boss material: brass
| Resistance to | most of oils |
| Body material | polyamide |
| Width | 48mm |
| Height | 28mm |
| Body colour | black |
| Thread length | 20mm |
| Type of mounting element | knob wing |
| Internal thread | M8 |
| Boss material | brass |