Thread size is 9/16-18
An item of solid one-piece construction, designed to restrict the flow of a fluid through it. It has an orifice of a smaller size than the diameter of flow into it. Excludes items such as valve (1), (as modified); and others with an adjustable orifice. Excludes pipe, tube, or hose fittings with restricted passages and items designed to test fluid flow. For items containing screens or filters, see restrictor unit, fluid flow.
NSN 6240-01-174-5646
NSN 5975-01-081-2572
NSN 6110-01-298-3784
NSN 5985-01-300-0821
NSN 6650-00-147-8765
NSN 4140-01-494-5838
NSN 5945-00-796-4597
NSN 5930-00-558-5800
NSN 5945-00-619-3553
NSN 2925-01-203-0493
NSN 6685-01-455-2902
NSN 5998-01-104-4783