2013Brackets/Widgets forum
Converting Allen bolts to finger-operable fasteners using press-fit knob heads
13 years old. Gear and prices may have changed since.
DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.
What the thread found
- Press-fit thumb screw heads can be installed onto socket head cap screws to allow finger operation instead of requiring an Allen key.
- Press-fit knobs should be installed using a bench vise or C-clamp rather than striking with a hammer or mallet.
- During installation, the knob must be oriented facing upward with the socket head cap screw resting against the center circular spud molded into the knob.
- The plastic spud pressed into the hexagonal socket becomes difficult to remove after installation and may require a rotary tool to extract.
- One to two practice installations are typically needed to achieve proper centered vertical mounting of the bolt.
- Improper installation technique can result in the knob shattering or the bolt being seated at an angle rather than vertically.
- Press-fit knobs are available in multiple sizes, shapes, and colors from industrial suppliers.
- Kip handles are mentioned as an alternative solution for replacing Allen bolts.
Depends on
- The installation process requires access to a bench vise or C-clamp.
- Achieving perfect vertical alignment of the installed bolt requires practice.
- Removal of the installed plastic spud is time-consuming if the knob needs to be replaced.
- The approach is most practical for applications where the bolt does not need to be frequently removed and reinstalled.