Adapter Number ConfigurationsWhen selecting an adapter fitting, remember a few basic rules of the number configurations:
The FIRST DIGIT represents the material used in the fitting: 9 for aluminum, 5 for stainless and 6 for steel.
The SECOND SEQUENCE OF 3 NUMBERS represents the shape of fitting you require: 816 is a straight, 822 is a 90 degree, etc.
Next, list the size of the AN end of the fitting.
And LAST, list the pipe end of the fitting, which is always based on the 16ths.
For Example: an aluminum (9) straight (816) -6 with 1/8p (pipe), the number sequence is 9 816 6 2 (981662)
And, a number 982266 would be an aluminum (9) 90 degree (822) -6 to 3/8p.
If the fitting is all pipe (no AN-0, the number changes to 01=1/8p, 02=1/4p, 03=3/8p, 04=1/2p, etc.
For Example: a number 991701 would be an aluminum (9) female tee (917) with 1/8p (01).
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