Single Air Line Fitting Bulkhead only.
 
Raw aluminum bulkhead
Proudly CNC'd in our Orange, CA shop
Work perfectly with modern DOT air line hose
Threaded with 3/8" NPT
Can be Cerakoted upon request
We use these on all our Old Anvil Speed Shop chassis
 
(Also available as a double air line fitting, in a set and in 1/4" NPT sizes)