MIL-PRF-81975C, PERFORMANCE SPECIFICATION: COUPLINGS, REGULATED, AERIAL PRESSURE REFUELING TYPE MA-2, TYPE MA-3 AND TYPE MA-4 (22-JAN-2008) [SUPERSEDING MIL-C-81957B]

MIL-PRF-81975C, PERFORMANCE SPECIFICATION: COUPLINGS, REGULATED, AERIAL PRESSURE REFUELING TYPE MA-2, TYPE MA-3 AND TYPE MA-4 (22-JAN-2008) [SUPERSEDING MIL-C-81957B]., This specification covers regulated, refueling couplings for use by tanker aircraft for refueling other aircraft using the probe and drogue method of aerial refueling. The types of couplings are as follows: Type MA-2: These couplings have no pressure regulation or surge suppression capability; Type MA-3: These couplings incorporate a single fuel pressure regulation mechanism; and Type MA-4: These couplings incorporate dual, redundant fuel pressure regulation mechanisms.