Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Furnace Filter Swing-Aside Spring Retainer Clip
A 16 mm wide flex-finger clip that screws next to a furnace or return-air filter slot with one #8 or M4 screw (4.5 mm hole). It holds filters up to 24 mm thick (standard 1" nominal) with a sprung pressure nub, and the lift lip at the tip lets you flick it aside without tools when you swap the filter. It replaces the lost or broken sheet-metal turn-buttons on filter doors. The finger flexes in the layer plane, so it won't split along layer lines. Overall size is 70 x 32 x 16 mm.
Bolt-On Mailbox Door Snap Catch
A replacement snap catch for a mailbox whose original door tab has broken off. It bolts to a flat side wall with two M4 bolts (Ø4.5 × 10 mm slots, so you can set it up to 5 mm back from the front edge). A 2.2 mm × 41 mm spring arm holds a 4 mm hook finger in front of the closed door, and a 45° ramp lets the door push it aside as it shuts. The catch is 90 × 20 × 16 mm and prints on its side, so the arm flexes along the layers instead of across them.
ESP32 Dev Board Snap Cradle
A 72 x 46 mm mounting plate with two 14 mm tall cantilever spring rails that snap over the long edges of any 18-30 mm wide dev board (ESP32 DevKitC, NodeMCU, Nano-class) — no mounting holes needed on the board, which is the whole problem with these modules. Rails start at a 20 mm gap and flex outward, the board lands on shelves 5 mm above the plate so soldered header pins clear, a backstop stops it sliding out, and the plate carries 4x M4 clearance wall holes, 2x M5 clearance holes on 20 mm centres for 2020 T-nuts, and a pair of zip-tie slots for USB cable strain relief.