1/4" female pipe threads in a bulkhead tank fitting. Brass 1/4" Female Pipe threads accessible from both sides of the bulkhead Note: 1/4" Female pipe is 1/2 inch across the center hole opening 15/16" Length Passes through a 3/4" hole Brass Bulkhead Fitting 1/4" Female NPT x For 3/4" Hole Dia. x 15/16" (.9375") long Use as a drain or inlet for tanks, drums, etc. Heavy duty brass Includes nut and aluminum grip washer Very good quality Hole Diamaeter to be used is 3/4" See Photos with ruler to ensure proper size. 15/16 inches Long Thread Size1/4" Female NPT Compare to current or past OEM Associations and Industry Crossover Numbers: Sapphire Scientific Prochem 21-086 fuel bulkhead Pumptec C-BHF-1/4F-3/4M-BS 28-301 28301 Legend Brands Cleaning 105088 Hydrotek DFF04 Olympus NM5087 Interlink Supply 107863 HydroForce 1683-0679 00398-04 129AS-B 129B04X15 1345 207ACBHS-4 55611 S611 271452686219 Karcher 8.705-140.0 Windsor 87051400