MIL-PRF-24699A (SH)
shipment will be withheld until group B inspection has shown that the corrective action was successful. In the
event of failure after reinspection, information concerning the failure shall be furnished to the cognizant
inspection activity and the contracting activity.
4.4 Tests.
4.4.1 Dimensions. Width of rolls and size of panels shall be determined by using a steel rule calibrated
in 1/16-inch graduations (see 3.3.1 and 3.3.3).
4.4.2 Surface density and weight.
4.4.2.1 Surface density. Surface density shall be determined in accordance with ASTM D 3776 (see
3.4.1).
4.4.2.2. Weight of rolls. Weight shall be determined by using a scale with a capacity and sensitivity
sufficient to weigh the entire item. The accuracy of the scale shall be certified by a recognized authority (see
3.4.2).
4.4.3 Breaking force. Breaking force shall be determined in accordance with ASTM D 5035 (see 3.5).
4.4.4 Tearing strength. Tearing strength shall be determined in accordance with ASTM D 2261 (see 3.6).
4.4.4.1 Rivet and grommet load bearing strength. Strength shall be determined using test procedures
described in ASTM D 638. Test specimens shall be prepared as follows: test specimens shall be 3 inches wide
and 7 inches long. Brass grommets (1/2 inch inside diameter by 1 inch outside diameter) shall be placed on the
width center, 1-1/2 inches from material ends. The two grommeted ends are attached to steel hooks mounted in
the tension tester jaws so that the steel hooks pass through the grommet eyelets. The tension tester is driven at a
rate of 20 inches per minute and the tear-out force of the grommets in pounds of pull is recorded (see 3.6.1).
4.4.5 Flexural rigidity. Flexural rigidity shall be determined in accordance with FED-STD-191, test
method 5206 at 45 degrees Fahrenheit (°F) and 133ºF (see 3.7).
4.4.6 Peel strength. Peel strength shall be determined in accordance with ASTM D 2724 (see 3.8).
4.4.7 Fire resistance.
4.4.7.1 Flammability. Flammability shall be determined in accordance with ASTM E 162 (see 3.9.1),
with the barrier material sample positioned so the woven facing faces the heat source.
4.4.7.2 Smoke density. Smoke density shall be determined in accordance with ASTM E 662 (see 3.9.2).
4.4.7.3 Noncombustibility. Type II materials shall be tested for noncombustibility in accordance with
USCG 164.009 (see 3.9.3).
4.4.8 Sound transmission loss.
4.4.8.1 Type I material. Transmission loss for type I barrier material shall be tested in accordance with
ASTM E 90 (see 3.10.1).
4.4.8.2 Type II material. Type II barrier material shall be tested in accordance with ASTM E 90, except as
follows: the type II barrier material shall be mounted to a base layer of 2-inch thick, fibrous glass panel in
accordance with ASTM C 1139 type II grade 6 and installed on a bulkhead as specified in ASTM E 1123 (see
3.10.2). Installation of the type II barrier material shall be in accordance with ASTM E 1123, except for the stud
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