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Pet Gate Snap-Detent Tube Catch
A catch that screws to a wall or door jamb and holds a swing gate's 22–25 mm (7/8–1 in) round frame tube. The tube slides into a 26 mm channel, and a flexure finger with a ramped bump snaps in behind it. Use it to replace the snapped plastic keeper on an older pet or baby gate without buying a whole new gate. It mounts with two #8 wood screws through 4.5 mm holes, and the part measures 84 x 46 x 32 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.
Twin-Arm RV Cabinet Snap Catch
A twin-arm spring catch that replaces the brittle plastic friction latches in RV, caravan and boat cabinets: two 2.6 mm cantilever jaws with cam lobes grip a 3 mm strike tongue (holds 2.5–3.5 mm), with moulded overtravel stops so the arms can't be splayed past 1.2 mm. The 66 x 30 x 3.5 mm flange mounts with four 4.5 mm M4 clearance holes on 36 mm and 56 mm spacings, and the whole catch stands 11 mm proud.