MIL-DTL-17191E(SH)
3.2 Mount design. Mounts shall meet the requirements of this specification and be constructed in accordance
with 803-1385777. S9073-A2-HBK-010 contains comprehensive test data showing performance characteristics
acquired during the development of each mount type. Included are damping values, static load-deflection, and
dynamic stiffness performance data. This data may be useful to the manufacturer attempting to construct mounts in
accordance with this specification. Refer to 2.4.
3.3 Materials.
3.3.1 Recycled, recovered, environmentally preferable, or biobased materials. Recycled, recovered,
environmentally preferable, or biobased materials should be used to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous
life cycle costs.
3.3.2 Metal. Mount metal components shall be manufactured from steel or manganese bronze as specified
(see 6.2). Metal shall be in accordance with the appropriate specification listed in 803-1385777; substitutions are
permitted when approved by NAVSEA. Components shall be formed into shape and finished in accordance with
the dimensions and allowable tolerances specified in 803-1385777. Metal components shall be protected against
corrosion by seawater and other atmospheric conditions encountered in service. Unless otherwise specified
(see 6.2), the minimum protective treatment shall be equivalent to that specified in 803-1385777.
3.3.3 Rubber.
3.3.3.1 Resilient element. The resilient element shall be fabricated of oil resistant compounds utilizing
polymerized chloroprene as the basic material. It shall be molded to the prescribed form and completely bonded to
all metal components of the mount with which it makes contact, as shown in 803-1385777. The rubber compounds
for the resilient elements shall be furnished in four classes. The mount type shall be fabricated from the
corresponding rubber compound shown in table I.
TABLE I. Rubber classes.
Mount type
Rubber compound
15P50A, 15P150A, 15P400A, 15P400B
Class A
15P100A, 15P220A, 15P550A, 15P550B, 15P800A, 15P800B
Class B
15P300A, 15P700A, 15P700B, 15P1000A, 15P1000B
Class C
15P1200A, 15P1200B, 15P2000A, 15P2000B
Class D
3.3.3.2 Physical requirements. Physical properties of the cured rubber compound used in the resilient element
shall conform to the physical requirements specified in table II.
TABLE II. Physical requirements of rubber compounds.
Verification
Property
Class A
Class B
Class C
Class D
method
1. Tensile strength (minimum), psi
-Before aging
2200
2500
2800
2900
-After aging at 194 °F for 46 hours
2100
2400
2700
2800
3
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