Description
Two clear cards that read the thread pitch on everyday nuts and bolts, one inch and one metric, plus an SAE size chart. This is the SAE Clear Card Thread Checker shown in my book, The Bolting Field Technician's Pocket Reference.
Two ways to read the pitch
Peel off the protective film first, so you can see through the card.
Hold it against the threads. Slide the card along until one row of arrows lines up with every thread crest. The number at the end of that row is the pitch.
Take a pencil rubbing. Lay paper over the threads, rub lightly with a pencil, and match the rubbing to a row of arrows. This works where a swing-out metal thread gauge won't fit, like inside a nut or on a bolt tucked behind a bracket.
What's in the package
- Clear Card Thread Checker, inch: 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 20, 24, 28 and 32 threads per inch
- Clear Card Thread Checker, metric: 2.5, 2.0, 1.75, 1.5, 1.25, 1.0, 0.8, 0.7 and 0.5 mm
- SAE & Common Sizes chart, inch and metric: bolt size, wrench size, UNC and UNF
- Instruction card, and a vinyl sleeve for each card
For technicians, DIYers and shophands matching a bolt for a car, a mower, an engine or a bike.
More detail on the SAE clear card set page. Want the whole kit? See the SAE Pocket Cards.
