10-32 UNF Male Thread with 1/16" or 1/8" ID, materials include Brass, Electroless Nickel plating or 303 Stainless Steel. Metal Orifice sizes range from 0.0039 to 0.063. Fitting has a Viton® O-ring. Synthetic Sapphire Orifice sizes range from 0.0012 to 0.0252.