Russell Performance Technical Support
Please take note that this page is not set to full scale. Please download and print this full scale pdf so that you can lay your fitting over the appropriate drawing to determine the correct size fitting you have.
THE 3 BASIC ELEMENTS OF PLUMBING
In order to plumb your vehicle with a minimum amount of time, effort and money, you should know the basics about hose, hose ends and adapter fittings. Hose diameters are assigned AN numbers. Using your automotive hose size, choose from the chart below to find the AN equivalent for hose, hose ends and adapter fittings.
For example: a 3/8" standard hose equals -6 AN.
The 3 Basic Elements of Plumbing, by Russell Performance Plumbing
Standard Automotive Hose Size   -AN Equivelent Hose Size
1/4" = -4 AN
3/8" = -6 AN
1/2" = -8 AN
5/8" = -10 AN
3/4" = -12 AN
1" = -16 AN
1-1/4" = -20 AN
1-1/2" = -24 AN
MALE AN ADAPTER IDENTIFICATION CHART
The line drawings below depict actual sizes of the various common AN thread sizes by dash number. Lay your fitting over the appropriate drawing to determine what size fitting you have.
Male AN Adapter Identification Chart, by Russell Performance Plumbing
PIPE THREAD SIZE CHART
Use the diagram below to find pipe thread size. Place fitting against base line; read fitting size where it intersects the vertical line.
Pipe Thread Size Chart, by Russell Performance Plumbing
AN Size Metal Tube O.D. Thread Size
-3 AN 3/16" 3/8" - 24 SAE
-4 AN 1/4" 7/16" - 20 SAE
-5 AN 5/16" 1/2" - 20 SAE
-6 AN 3/8" 9/16" - 18 SAE
-8 AN 1/2" 3/4" - 16 SAE
-10 AN 5/8" 7/8" - 14 SAE
-12 AN 3/4" 1-1/16" - 12 SAE
-16 AN 1" 1-5/16" - 12 SAE
-20 AN 1-1/4" 1-5/8" - 12 SAE
B-NUT SIZE CHART
The line drawings below depict actual sizes of the various common types of fittings, hose ends and adapters. The number in parenthesis is SAE wrench size equivalent.
B-Nut Size Chart, by Russell Performance Plumbing
HOSE INSTALLATION TIPS
Hose Installation Tips, by Russell Performance Plumbing
HOW TO ASSEMBLE PROFLEX & PRORACE HOSE WITH FULL FLOW HOSE ENDS
Proflex and Prorace Hose with Full Flow Hose End Assembly, by Russell Performance Plumbing
HOW TO ASSEMBLE PROCLASSIC HOSE WITH CRIMP HOSE ENDS
Proclassic Hose with Proclassic Crimp Hose End Assembly, by Russell Performance Plumbing
HOW TO ASSEMBLE PROCLASSIC HOSE WITH FULL FLOW HOSE ENDS
Proclassic Hose with Proclassic Full Flow Hose End Assembly, by Russell Performance Plumbing
HOW TO ASSEMBLE POWERFLEX HOSE & HOSE ENDS
Powerflex Hose & Hose End Assembly, by Russell Performance Plumbing
HOW TO ASSEMBLE TWIST-LOK HOSE & HOSE ENDS
Twist-Lok Hose & Hose End Assembly, by Russell Performance Plumbing

WARNING: ALL products on this page can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.