MIL-DTL-14824C(AR)
4.3 Conformance inspection.
4.3.1 Lot formation. Lot formation shall be in accordance
with lot formation requirement of MIL-STD-1916 (Formation and
identification of lots or batches).
4.3.1.1 Heat treatment inspection lot. Heat treatment
inspection lots shall not exceed one mill heat of steel.
Whenever a break in heat treating of eight (8) hours or more
occurs or a furnace is shut down for any length of time, the heat
treatment inspection lot will be terminated and a new lot shall
start. Additionally, heat treatment inspection lots shall be
restricted to components heat treated in the same heat treating
equipment, at the same temperature, for the same length of time
and in one unchanged process. When a batch type furnace is used,
the heat treatment inspection lot shall be further restricted to
those components heat treated at the same time in one batch.
Batches may be combined into larger heat treatment inspection
lots after qualifying with individual batches provided qualifying
procedures are submitted to and approved by the Government and
provided all other restrictions detailed above are met. Test
samples shall be selected from the heat treatment inspection lot
after final heat treatment. Components in heat treatment
inspection lots shall remain grouped together and identified by
inspection lot until mechanical property tests have been
completed. Components from heat treatment inspection lots which
comply with applicable requirements may be subsequently regrouped
into final assembly lots.
4.3.1.2 Miscellaneous Lots. Small lots (such as bodies
manufactured from abnormally small heats of steel or bodies that
have become separated from previously delivered lots, etc.) may
at the discretion of the supplier be grouped into miscellaneous
heat treatment lots. Such lots shall be identified by a
miscellaneous lot code number and processed in accordance with
4.3.1.1. The miscellaneous lot thus constituted shall be the
basis for the selection of samples for the tension test
hereinafter prescribed.
4.3.1.3 Projectile lots. When it has been determined that
bodies of a heat treated lot have complied with the mechanical
properties requirement of dwg. 10535927, they may be grouped for
further processing.
4.3.2 Classification of characteristics.
a. Sampling requirements. Inspection sampling requirements
for critical, major and minor characteristics are defined in MIL-
STD-1916. Unless specified otherwise, Inspection Level IV shall
be used for all characteristics defined as Majors and Inspection
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