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.*
120 mm Fan Standoff Finger Guard
A finger and wire guard for a bare 120 mm axial fan. It bolts on through the standard 105 mm square hole pattern with 4.5 mm holes that take fan screws or M4 bolts, and a 3 mm built-in standoff ring holds the concentric grille clear of the blades. The guard is 120 x 120 x 5 mm. The ring gaps are about 7.5 mm, small enough to keep fingers and loose leads out of a fan you've pulled for a DIY amp, PSU or rack build.
Round Bath Fan Grille With Slotted Spring Ribs
A 180 mm round replacement grille for older round-housing ceiling bath fans that no longer have a grille available. It covers housing openings up to about 170 mm and has a 104 mm vented field. Two upright ribs have 24 mm-long M3 slots, so a pair of standard replacement grille torsion springs can be bolted on with M3 screws and nuts at any spacing from 48 to 96 mm to match the spring slots in your housing.
Bath Fan Grille Torsion Spring Bracket
This bolt-on L-bracket replaces the broken spring tab on a ceiling exhaust fan grille. It fixes the grille that falls because its plastic spring tab snapped off. Put the 40 x 20 mm base against the back of the grille and fasten it with two M3 screws and nuts through 3.4 mm clearance holes, 28 mm apart. The 24 mm gusseted upright has two 2.4 mm holes, 10 mm apart, that take the hooked ends of the original wire torsion spring (about 1.5–2 mm wire). The part prints on its side, so the spring pull runs along the layers instead of across them.
Parametric 4x4 in Drop-In Register Grille
A drop-in wall or ceiling register grille for a 4 x 4 in (101.6 mm) duct opening. Use it when a duct resize or drywall job leaves a hole that no store-bought cover fits. It has a 132 mm square face, a 98 mm locating skirt that leaves 1.8 mm of play per side, 3.5 mm straight-through slots stiffened by 9 mm deep vanes, and two countersunk 4.6 mm holes for #8 wood screws (4.2 mm shank) or M4 screws. Change OPEN_W and OPEN_L at the top of the script to fit other opening sizes.