30º LARGE THREADED ELBOWS - 3.5” to 6” They are machined from tough extruded 6061-T6 aircraft aluminum alloy, hard coated for corrosion resistance and abrasion. Threaded Female Swivel to Male AE3535-30 30° Elbow 3.5” NH female swivel rocker lug x 3.5” NH male AE4040-30 30° Elbow 4" NH female swivel rocker lug x 4" NH male AE4545-30 30° Elbow 4.5” NH female swivel rocker lug x 4.5” NH male AE5050-30 30° Elbow 5" NH female swivel rocker lug x 5" NH male AE6060-30 30° Elbow 6" NH female swivel rocker lug x 6" NH male National Standard Thread (NST), also known as National Hose thread (NH). It is the most common type of fire hose coupling used in the United States. Laser Engraving We also offer custom laser engraving of your adapters. If you require this option, please select that option and type in the box the name or initials you want laser engraved. The size of your adapter limits us on how many letters/numbers we can engrave. Laser engraved adapters are not subject to cancellation or return. Delivery Times Delivery times are variable by the size and thread types you select. If you require any adapter in a rush, please give us a call, and we will be most happy to contact our factory for a lead time. Adapter Specialists We are adapter specialists, and our goal is to help you order the correct adapter the first time. However, many adapters are made to order, and unfortunately, they are not subject to cancellation or return once your order has been submitted. Please call us before ordering if you are uncertain of your thread types, sizes, or other questions.