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 5999-00-925-2502
NSN 5895-01-588-1217
NSN 6220-00-541-8515
NSN 5985-00-351-9456
NSN 5950-01-076-4701
NSN 5975-01-356-3070
NSN 5895-00-246-4415
NSN 6320-01-473-9024
NSN 6685-01-518-2192
NSN 5996-01-268-3404
NSN 5910-01-141-6667
NSN 2925-01-301-9339