MIL-DTL-22606D(SH)
d.
M Separator inlet/outlet plug (see figure 6)
e. D Internal drain plug (see figure 7). Type D plugs can only be used as drain plugs, and not as inlet plugs.
Horizontally mounted flasks and flasks mounted on an incline greater than 45 degrees from vertical require a
Type D drain plug. Note that horizontal mounting of flasks is not recommended and is to be avoided whenever
possible. Horizontally mounted flasks do not drain completely, necessitating increased recertification periodicity,
which results in much higher life cycle costs of the flask.
f. X Special plug. Type X plugs are of special design that does not comply with plug Types S, R, Y, M, or
D. Type X plugs are provided in accordance with details specified by the procuring activity (see 6.2). All material,
cleanliness, and testing requirements for plugs specified herein still apply.
1.2.4.1 Plug seal types. Every plug type is threaded into the flask and sealed by one of two methods as follows:
a.
b.
2
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