Thingiverse
Foot-Pump Locking Plug
by IainT
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Locking plug to hold [this Michelin foot pump](https://m.media-amazon.com/images/I/715+bQfSFkL._AC_SL1354_.jpg) closed.
The elongated faceted knob lets your fingers (and eyes) know from its orientation when you’ve engaged the lock, and the faceted shaft locates positively when turned.
***WARNING**: the plug will spend most of its life with a strong shear force applied to it, and if it should fail with time, or for PLA with temperature, the pump could fly open unexpectedly and forcefully, possibly causing damage or even injury.*
The elongated faceted knob lets your fingers (and eyes) know from its orientation when you’ve engaged the lock, and the faceted shaft locates positively when turned.
***WARNING**: the plug will spend most of its life with a strong shear force applied to it, and if it should fail with time, or for PLA with temperature, the pump could fly open unexpectedly and forcefully, possibly causing damage or even injury.*
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