MIL-PRF-3420H
the letter of authorization for submittal of sample may be obtained from: Commander, Naval Air
Warfare Center Aircraft Division, Code 6.7.2.2, Building 562-3, Room 134, Highway 547,
Lakehurst, NJ 08733-5049.
Carrier material supplied under contract should be identical in every respect to the samples
tested and found to meet the requirements of this specification. Any unapproved changes from
the qualification sample should constitute cause for rejection for material submitted and for
removal from the list of qualified products. However, acceptability under this specification is
based on the performance characteristics of the barrier material, and since there is no color
requirement, it is not mandatory that the color of the visible surfaces of the material supplied
under contract be the same as the samples tested and accepted by the qualifying activity.
6.3.1 Submission of qualification samples. Prior to submitting samples for qualification
testing, manufacturers must request authorization from the qualifying activity. Upon receipt of
authorization, samples are to be forwarded as directed by the qualifying activity. The samples
should be plainly and durably marked with the following information:
Sample for Qualification Inspection
WRAPPING MATERIALS, VOLATILE CORROSION INHIBITOR TREATED,
OPAQUE
Manufacturer's Name
Manufacturer's Code No.
Class
Style
Date of manufacture (month and year)
Submitted by (name) (date) for qualification inspection in accordance
with requirements of MIL-PRF-3420H under authorization (reference
authorizing letter)
6.3.2 Submitted samples. The qualification inspection sample should be considered
representative of the manufacturer's entire line of treated carriers; however, where the following
modifications have been made, additional qualification samples as specified in 6.3.1 should be
submitted.
a. Change in quantity or type of corrosion inhibitor.
b. Change in method of treatment, such as impregnation to coating or vice versa.
c. Change in binder.
d. Change to a different basic carrier other than kraft paper, such as direct application to
foil, plastic, or other carrier material.
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