MIL-DTL-19379 Mounts, Resilient, Mare Island Types 11M15, 11M25, And 10M50This specification covers Mare Island Rubber Laboratory type resilient mounts used to support equipment on surface ships and submarines. This specification includes requirements and verification tests for the rubber compound and fully assembled mounts.

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MIL-DTL-19379C(SH)

TABLE XIV. Strength test peak loads.

Mount type

Level A (lbs)

Level B (lbs)

11M15

1000

1300

11M25

1390

1810

10M50

2170

2835

4.4.2.2.3 Radial direction strength test. Two mounts shall be tested in the radial direction as a pair while

axially compressed back-to-back in a fixture similar to that shown in figure 2. Referring to the figure, axial

compression is adjusted via the four threaded rods. The axial deflection of each mount shall correspond to its upper

load rating as measured during the axial strength test. Mounts shall be subjected to four radial loading and

unloading cycles at a constant deflection rate not to exceed 0.3 inch per minute while compressed statically in the

axial direction. The peak load applied to the test fixture shall be to "Level A" for the first three loading cycles and

to "Level B" for the fourth loading cycle. Load-deflection data shall be recorded during the fourth loading cycle. A

per-mount average load-deflection plot shall be determined by dividing the load at each displacement by 2. The

mount shall be inspected during and after testing to determine compliance with 3.5.3.