MIL-C-8605B
applicable Government specifications Materials conforming to contractor's specifications
may be used provided the specifications are released by the Services and contain provisions
for adequate tests. The use of contractors' specifications will not constitute waiver of
Government inspection. All materials used in the cap shall be sufficiently resistant to fuels
conforming to MIL-T-5624, MIL-T-83133 and TT-S-735 with aromatic content from 0 to 30
percent, to assure satisfactory operation as herein defined.
3.2.1 Metals. Metals used on the exterior of the cap shall be nonsparking, nonferrous.
Ail metals not of corrosion resisting type shall be suitably protected to resist corrosion
during the normal service life of the cap. (See Paragraph 3.7.2) The use of dissimilar
metals, especially brass, copper or steel in contact with aluminum or aluminum alloys shall
be avoided where practicable. Dissimilar metals are defined by MIL-STD-889.
3.2.2 Selection of Materials. Specifications and standards for all materials, parts, and
Government certification and approval of processes and equipment, which are not
specifically designated herein and which are necessary for the execution of this specification
shall be selected in accordance with MIL-STD-143, except as provided in the following
paragraph.
3.2.2.1 Standard Parts. Standard parts (MS, AN, or JAN) Shall be used wherever they
are suitable for the purpose, and shall be identified on the drawing by their part numbers.
Commercial utility parts such as screws, bolts, nuts, cotter pins, etc., maybe used provided
they possess suitable properties and are replaceable by the standard parts without alteration,
and provided the corresponding standard part numbers are referenced in the parts list and,
if practicable, on the contractor's drawings. In the event there is no suitable corresponding
standard part in effect on date of invitation forbids, commercial parts maybe used provided
they conform to all requirements of this specification.
3.3 Design and construction.
3.3.1 Design. The cap as shown on MS29525 or MS29526 shall be designed to close
and seal aircraft pressure fuel servicing connections which use MS24484 adapters. The
design shall be such that removal of the cap will not be hindered by negative pressures
acting between the cap and the adapter. If necessary, automatic relief venting shall be
provided. The design shall include a means of connecting and disconnecting the cap easily
by one gloved hand without the use of tools. The cap shall incorporate a positive locking
mechanism. The outside surface of flush-type caps shall be flat as practicable in order to
reduce air resistance.
3.3.1.1 Weight. Caps conforming to MS29525 shall weigh less than 0.80 pounds. Caps
conforming to MS29526 shall weigh less than 0.65 pounds.
3.3.2 Construction. The cap shall be so constructed that it will withstand the strains,
jars, vibrations, and other conditions incident to shipping, storage, and service use.
3.3.2.1 Primary Seal. The cap to adapter face seal shall be readily replaceable with a
minimum replacement of attaching parts.
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