Custom Metric L-Gauge for Bolt Sizing, 4 mm to 20 mm

A custom metric L-gauge checks a bolt's diameter, thread pitch and length on one L-shaped card, so a mechanic can identify a loose metric fastener in three quick steps. Built for import repair shops, equipment dealers and parts counter staff, it sizes metric bolts from 4 mm to 20 mm and keeps your logo on the bench.

The L shape gives room for sizing holes, pitch teeth and a 230 mm ruler on a single card, so longer bolts can be measured end to end. The pitch teeth confirm metric pitches from 0.8 to 6.0, which settles the coarse or fine question before a nut gets cross-threaded. Parts stores hand it to customers who bring in a bolt from an imported car, mower or machine, and dealers include it in technician welcome kits. The card is 10.5" by 5" and 1/16" thick, flat enough for a toolbox lid or a mailer, and the plastic resists oil and grease. Because the pitch teeth and holes sit on the same card, a counter clerk can answer a sizing question without leaving the register. Fleet shops that run European or Asian trucks find it useful on the bench, where metric hardware is the norm. Equipment rental companies tuck one into each toolkit they send out.

Pair it with the inch L-gauge for shops that see both SAE and metric hardware every week, and order both in the same run so the cards match. For nuts, washers and bolts larger than 20 mm, the full range of promotional bolt gauges covers the rest of the counter.

Send your logo and quantity for a free, no-obligation quote. A free digital proof shows the layout before anything prints.