Check the listing for details. AF C5325-06-06 - 3/8 Male JIC (9/16''-18 Threads) Union Bulkhead. Condition: New. Listed at 3.16 USD. Item Type: Adapter Fitting - Male JIC x Male Bulkhead JIC - Union Bulkhead Nominal Size: 3/8 Male JIC x 3/8 Male Bulkhead JIC - Union Bulkhead Material: Plated Steel Alternate Part Numbers: Aeroquip 2041-1-6-6S Parker 6 WTX-S Weatherhead C5325X6 JIC THREAD CHART - THREAD SIZE MEASUREMENT TAKEN FROM OUTSIDE DIAMETER OF MALE THREADSJIC 37 degree flare fittings form a metal on metal seal on a 37 degree cone. Thread pitch is the same as SAE 45 degree flare in most sizes and some female assemblies have a dual 37/45 degree seat for this purpose. Size 6 and size 12 do not cross over. Tube Size (NOMINAL SIZE) Dash Size Thread Size 1/8" - 2 5/16" - 24 3/16" - 3 3/8" - 24 1/4" - 4 7/16" - 20 5/16" - 5 1/2" - 20 3/8" - 6 9/16" - 18 1/2" - 8 3/4" - 16 5/8" - 10 7/8" - 14 3/4" - 12 1-1/16" - 12 7/8" - 14 1-3/16" - 12 1" - 16 1-5/16" - 12 1-1/4" - 20 1-5/8" - 12 1-1/2" - 24 1-7/8" - 12 2" - 32 2-1/2" - 12