MIL-DTL-12235A (MR)
6.5 Hydraulic press. The Detroit testing Machine, Model RB-1, has been found suitable for the
test specified in this specification. The test is performed as follows:
a) Place shell on test fixture and adjust glide so that the rotating band of the projectile is
correctly located with respect to the indentor.
b) Step on treadle and allow load to act until needle of indicating dial which measures
ram travel, comes to rest. Note reading.
c) Release treadle and allow indicating needle to return to zero.
d) Without disturbing the projectile, repeat step (b) and note reading.
e) Release treadle.
f) Take difference between the readings of step (b) and (d). It is a function of the gap or
clearance at the diameter and is called the indicated diametral clearance.
g) Repeat above steps (a) to (e) for other diameters of the shell.
6.6 Marking. Suggested wording to be included in the contract or purchase order "Marking for
shipment and storage shall be in accordance with MIL-STD-129" (see 6.2).
6.7 Packing container. Suggested wording to be included in the contract or purchase order (see
6.2): The projectiles should be packed in commercial-type containers so constructed as to insure
acceptance by common or other carrier for safe transportation, at the lowest rate, to the point of
delivery. Each projectile should be protected from coming into contact with another projectile
by means of suitable partitions. The packing container should be sufficiently rigid to permit
storing in tiers of at least 10-foot height without damage to either container or contents. The lot
number should be marked on each container.
6.8 Subject term (key word) listing.
Aluminum
Armor
Ballistic
Body armor
Steel
Weldment
6.9 Changes from previous issue. Marginal notations are not used in this revision to identify
changes with respect to the previous issue due to the extent of the changes.
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