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|  MIL-S-70538A (AR)
B 117 using a 5% salt solution. The test duration and
accept/reject criteria shall be as specified in the applicable
specification. If any part fails to meet the applicable
requirement, the first article or production quantity processed
since the last acceptable test shall be rejected.
4.7.12 Hardness. Five samples shall be selected from each
heat treatment batch. The test shall be performed as specified
in ASTM E 18. Each heat treatemnt batch shall remain segregated
until completion of all required tests. If any sample fails to
comply with the specified hardness requirement, the sample shall
be classified defective and the lot shall be rejected. A heat
treatment batch shall be defined as parts that have been heat
treated at the same time in the same furnace and quench bath for
all phases of the heat treatment process.
4.8 Inspection equipment. The inspection equipment
required to perform the inspections specified herein is
identified in the "Inspection Method Reference" column of the
Classification of Characteristics listings starting with 4.4.2.1.
Contractor inspection equipment designs shall be submitted for
Government approval as specified in the contract. Designs which
provide variable measurements instead of attributes data are
preferred in order to facilitate the use of statistical process
control. See MIL-W-63150 and 6.5 herein.
5.
PACKAGING.
5.1 Preparation for delivery. Packaging and packing shall
be commercial as specified in Standard Practice for Commercial
Packaging ASTM D 3951.
6.
NOTES
(This section contains information of a general or explanatory
nature that may be helpful, but is not mandatory.)
6.1 Intended use. Assemblies and components covered by
this document are intended for use with the M249, 5.56mm machine
gun and associated 5.56mm ammunitions.
6.2 Acquisition requirements.
Acquisition
documents
should
specify
the
following:
Title, number and date of this specification.
a.
Issue of DODISS to be cited in the solicitation,
b.
and if required, the specific issue of individual documents
referenced (see 2.1.1 and 2.1.1).
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