MIL-C-8605B
3.3.2.2 Direction of Rotation. The cap rotation to engage and seal shall be in a
clockwise direction.
3.3.2.3 Lubrication. The cap shall operate satisfactorily without the use of lubricant.
3.3.2.4 Locking. The cap shall incorporate a rocker arm assembly as shown on
MS29525 and MS29526 to positively and automatically lock the cap when fully engaged.
The arm shall be spring loaded in a closed position. Once engaged, the cap shall not rotate,
loosen, or unlock (even in the event of the formation of negative pressures) until the arm
is raised.
3.3.2.4.1 Locking Indicator. The design shall provide a visual indication that the cap
has not been properly installed and rotated to the locked position. When properly installed
the rocker arm will be flush with the cap surface.
3.3.2.4.2 Installation and Removal. The installation of the cap shall be accomplished
by applying a force of not more than 25 lbs. in the direction of the caps axis and rotating
it 35 + 5 degrees in a clockwise direction. This allows the locking pin of the rocker arm to
engage in one of the three locking slots of the MS24484 adapter. The torque required to
install or remove the cap, (rocker arm in the up position), shall not exceed 75 in.-lbs.
Removal of the cap shall be accomplished by pressing at the "Press to Unlock" lettering
sections of the rocker arm and rotating the cap counterclockwise. The necessary force to
unlock the lock pin shall not exceed 6 lbs.
3.4 Interchangeabilitv. All component parts shall be governed by the part numbering
system of DoD-STD-100.
3.5 Threaded parts.
3.5.1 Screw Threads. Screw threads shall be in accordance with MIL-S-7742.
3.5.2 Locking of Threaded Parts. All threaded parts shall be securely locked by safety
wiring, self-locking nuts, cotter pins, or other approved means. Safety wire shall have a
minimum diameter of 0.032 inch and shall conform to MS20995. Self-locking nuts shall be
of the all-metal type conforming to MIL-N-25027, and shall be used in accordance with
MS33588. Staking and the use of lock washers is not permitted.
3.6 Synthetic Rubber Parts. Elastomeric materials shall be selected for long term
stowage (20 years). Age sensitive elastomers, as defined in MIL-STD-1523, shall not be
used.
3.6.1 "O" Ring. All "O" rings shall conform to either MS33666 or MIL-R-25988.
3.7 Finishes and protective coatings.
3.7.1 Finishes. The cap finish shall be smooth and free from sharp edges. Painted
parts of non-flush caps shall be finished in accordance with MIL-F-18264 and finish coat
shall be insignia red enamel conforming to Type II or Type III of TT-E-489. Surfaces
exposed as an indication that the lock is not engaged shall be painted yellow color No.13655
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