Drag to rotate · scroll to zoom. Files are for personal use — no resale or redistribution.
Eight-Cylinder Spark Plug Reading Tray
A 128 x 76 mm bench tray for a tune-up. It has eight 15.5 mm wells, 29.6 mm deep, that hold M14 (and smaller M12/M10) spark plugs threads-down, so the plug sits on its hex and the electrode stays off the bench. Raised dots next to each well count 1 to 8 (odd numbers on the front row, even on the back row, matching V8 bank numbering), so every plug stays in cylinder order while you read and gap it.
Flagged: automotive electrical. Not for safety-critical use without independent engineering review.
Ordering a print of any gallery model is free once you're signed in. Want the OBJ for your own printer? Download it for $1 — no account needed, we email you the link. Signed-in members can pay with credits instead.