818 Series AN Tube Nut 818041 by RHP. This product is made of highquality materials to serve you for years to come. Designed using stateoftheart technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost.Features. Aluminum Tube End Fitting Nut. Pack of 6Specifications. Size 4 AN/JIC. Color Blue. Weight 0.02 lbs