MIL-DTL-43607J
3.5.2.9 Salt spray (fog) resistance. The padlock and its keys shall withstand exposure to salt spray
(fog) for not less than 96 hours without exhibiting evidence of deterioration of any component, except
for minor corrosion that does not adversely affect the performance of the padlock and keys (see
4.5.1.11).
3.5.3 Key integrity. The keys furnished with any padlock shall be not capable of locking, unlocking,
or removing the cylinder of any other padlock (see 4.5.1.10).
3.6 Detailed requirements. The padlock, components, and keys shall be as specified in 3.6.1 through
3.6.4.1.
3.6.1 Body. The complete assembled body of the padlock shall have no openings other than shackle
opening and keyway, except that drainage holes and plugged holes are permissible. Drainage holes, if
incorporated, shall be not larger than 0.093 inches (2.40 mm) diameter. The body shall incorporate a
means to prevent access to the locking mechanism, except by use of a control key or by disassembly
of the padlock.
3.6.2 Shackle. The shackle shall be 0.50 +0.002 -0.010-inch (12.7 + 0.05 -0.254 mm) diameter. The
shackle shall remain securely attached when the padlock is in the unlocked, fully opened position and
shall be capable of being separated from the padlock only when the padlock is disassembled.
3.6.3 Locking mechanism. The shackle shall be held in the locked position by a dead-bolt type lock
mechanism. The padlock shall open when the key is turned in the clockwise direction and lock when
the key is turned in the counterclockwise direction. The operating key shall be retained in the keyway
of the cylinder and shall not be removable when the padlock is in the open position.
3.6.3.1 Cylinder assembly. The cylinder assembly of the locking mechanism shall have a plug with
only three distinct, easily recognizable, positions. Two positions of the plug shall be operating
positions of locked and unlocked. The third position shall be the control position which allows
disassembly of the lock.
3.6.3.2 Cylinder assembly removal. The cylinder assembly shall be securely retained within the
padlock body when the cylinder plug is in either the locked or unlocked position. The cylinder
assembly shall be removable from the padlock body only after the cylinder plug is rotated to the
control position by use of a control key. When removed from the padlock body, the cylinder
assembly shall remain as one assembly (see 4.5.1.15).
3.6.3.3 Cylinder assembly interchangeability. A cylinder assembly from any one padlock delivered
under a contract shall be interchangeable with a cylinder assembly from any other padlock delivered
under the same contract (see 4.5.1.16).
3.6.3.4 Key. The padlock shall be furnished with three keys, consisting of two operating keys and
one control key. Terms for parts of keys and padlocks used herein are defined below and shown on
figure 2. However, the illustrations shown in figure 2 are not intended to restrict the use of other types
of keys.
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