3/4" BSPT Female Steel Plug "IM" Style - 992143 Quick Action Couplings are bayonet style couplings which are used in pairs. A pair of couplings comprises a female and male coupling which are connected together by a push and quarter turn. Once connected, the spring loaded sleeve of the male coupling prevents accidental disconnection. DIRECTION OF FLUID FLOW IS FROM FEMALE TO MALE on ALL Macdonald QUICK ACTION Couplings. Applications: Used on compressed air, Nitrogen and low pressure steam lines in oil refineries, chemical and industrial plants to ensure maximum safety of operation. Interchangeability: Any size of styles HF, IF or OF will connect with any size HM, IM or OM within each range. Material: Body: Mild Steel, 220m07, Zinc plated Sleeve return spring: Stainless steel, 302s26/2b.s2056 Seals: -30ºC to +120ºC Nitrile rubber as standard Viton available by request