Back to Main Tech Support Page
Ask a Question
Technical Questions
Can't find an answer in our Help Center? Submit a question, and we'll get back to you soon.
Need Business/Order Related Support?
Search our Help Center
Get answers to business and order questions from our experienced Customer Service representatives.
Website Feedback
How are we doing? We really are interested in knowing how you feel about DX Engineering. Contact us with your comments - good, bad, great, so-so, or whatever. We want to hear from you!
Stop Guessing and Start Measuring wth a Summit Racing™ AN and NPT Plumbing Gauge
We've taken some of the guesswork out of automotive plumbing projects with our AN and NPT Auto Plumbing Gauge. Precision laser cut from 304 stainless steel, this handy tool can help determine exact sizes of thesse fittings and hose:
• Male AN fittings sizes -4AN to -16AN
• AN wrenches sizes -4AN to -16AN
• NPT plug and fitting diameters 1/8” to ¾”
• Outside diameter (O.D.) of stainless steel braided hose -4AN to -16AN
• Outside diameter (O.D.) of steel brake, fuel, and transmission lines from 3/16” to 3/8” fractional sizes only
The Summit Racing™ AN and NPT Auto Plumbing Gauge is easy to use—simply match fittings, pipes, and hoses to the proper notch or hole in the gauge to quickly determine the correct size.