These NH × NPSH hose thread adapters connect same-size fire hose components that use different thread standards. Each adapter has one female connection and one male connection and is manufactured from 6061-T6 aluminum with a durable hardcoat-anodized finish. KEY FEATURES Converts between NH and NPSH threads Female × male configuration 6061-T6 aluminum MIL-A-8625 Type III, Class 1 hardcoat anodizing THREAD OPTIONS Female Male 1 in. NH 1 in. NPSH 1 in. NPSH 1 in. NH 1½ in. NH 1½ in. NPSH 1½ in. NPSH 1½ in. NH 2½ in. NH 2½ in. NPSH 2½ in. NPSH 2½ in. NH 3 in. NH 3 in. NPSH 3 in. NPSH 3 in. NH Important: NH and NPSH are different thread standards. Confirm both connections before ordering.