Details
AC811BT20 AC811 brass coupling nut for 1-1/4 in. OD tube, NS condition.
Part Number: AC811BT20
Part Type: Nut - Coupling
Condition: NS
Thread: 1-5/8-14 (AC811 -20)
The AC811-BT is the coupling nut for the three-piece AC811 flared tube system (fitting, AC811-T sleeve and BT nut), the pre-AN Army Air Corps standard that AN fittings replaced during WWII. In the -20 size the AC811 thread is 1-5/8-14 while the AN818-20 is 1-5/8-12, so AC811 and AN nuts are not interchangeable in this size.
Photos are for reference only.
Warranty Information