- Made of lightweight 6061 alloy aluminum - Designed for smooth flow easy assembly   - 37 degree AN flare - Compatible with all AN adapter fittings - Anodized coating Blue & Black - Reusable, over and over. -Simple, easy to order and Made in USA!!

AN Tube Nuts Part Number Description List Each 818-03D -3 AN Tube Nut - Anodized $2.39 818-04D -4 AN Tube Nut - Anodized $2.39 818-06D -6 AN Tube Nut - Anodized $2.69 818-08D -8 AN Tube Nut - Anodized $3.49 818-10D -10 AN Tube Nut - Anodized $3.99 818-12D -12 AN Tube Nut - Anodized $4.99 AN Tube Sleeves Part Number Description List Each 819-03D -3 Tube Sleeve - Anodized (for use with 818-03D) $1.99 819-04D -4 Tube Sleeve - Anodized (for use with AN818-04D) $1.99 819-06D -6 Tube Sleeve - Anodized (for use with AN818-06D) $2.39 819-08D -8 Tube Sleeve - Anodized (for use with AN818-08D) $2.99 819-10D -10 Tube Sleeve - Anodized (for use with AN818-10D) $3.49 819-12D -12 Tube Sleeve - Anodized (for use with AN818-12D) $4.69