8AN -10AN NPT may be more or less indentical with the codes used by some suppliers for compression fittings to the oil industry. NPT = National Pipe Thread ( others are UNC-UNF etc) AN= Some kind of adapter ex; AM can be Adapter Male 8 &10= Thread size 8 may be 1/4" NPT and size 10 3/8" NPT I do know it not a perfect answer, but it hopefully will give you some ideas.. Regards Viggo Oslo
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