DIG-5

DIG-5 is a DK-Lok no-go gap inspection gauge for 5/16" tube fittings. It gives you a quick visual check that a DK-Lok fitting was pulled up far enough on initial make-up. A-Best Industrial Inc. Fittings, Valves, and Tubing is an authorized DK-Lok distributor in San Pedro, CA, and can quote price and lead time, usually the same day.

• Fitting size: 5/16" tube
• Fits: DK-Lok two-ferrule tube fittings

How to Use It

Use it on the initial make-up of a DK-Lok tube fitting. Per DK-Lok's instructions:

• If the gauge does not fit into the gap between the nut and the body hex, the fitting is tightened enough.
• If the gauge fits into the gap, the fitting needs more tightening.

Don't use the gauge on a remade fitting. When you remake one, tighten back to the previous position and go slightly past it.

Other Sizes

For 1/4", 3/8", 1/2" and 3/4" and 6, 10, 12 and 18 mm fittings, the DIG-468 covers all eight sizes in one gauge.

To check that the tube is bottomed in the fitting before you tighten, pair the gauge with a DK-Lok DTM tube depth marking tool. See the rest of our tube installation tools.

Questions or a quote? Call 310-833-3353 or email sales@abesttube.com.

Full dimensions are in the Specifications tab.