Knob
Turn any hex-head bolt into a hand-tight fastener, add a grip handle to machine adjusters, or replace a lost bolt knob on jigs and fixtures. Set bolt hole size, hex depth, head diameter, and neck length to match your exact hardware.
52 sizes available. The standard size is a free download. Custom sizes with a free account.
Clearance is built in for this part. How fit works
Download: the standard STL is free, with no account needed. Unlocking sizes gives you digital files. Ordering a printed part includes manufacturing and shipping at checkout.
Preset sizes
| Knob Diameter | Knob Hex Depth | Knob Hex Width | Knob Thickness | Knob Shaft Length | Knob Shaft Diameter | Knob Bolt Hole Diameter |
|---|---|---|---|---|---|---|
| 50 | 2 | 5.5 | 10 | 10 | 30 | 3 |
| 50 | 3.5 | 8 | 10 | 10 | 30 | 5 |
| 70 | 3.5 | 8 | 10 | 10 | 30 | 5 |
| 60 | 3.5 | 8 | 10 | 20 | 30 | 5 |
| 60 | 3.5 | 8 | 10 | 25 | 30 | 5 |
| 60 | 4 | 10 | 10 | 10 | 30 | 6 |
| 60 | 4.1 | 11.1 | 10 | 20 | 30 | 6.4 |
| 50 | 5.3 | 13 | 10 | 10 | 30 | 8 |
| 70 | 3.5 | 8 | 10 | 25 | 30 | 5 |
| 60 | 3.5 | 8 | 10 | 10 | 30 | 5 |
| 50 | 3.5 | 8 | 10 | 8 | 30 | 5 |
| 50 | 4 | 10 | 10 | 10 | 30 | 6 |
37 more preset sizes in the catalog, plus any size you enter.