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|  MIL-F-48877A (AR)
molded parts shall carry the individual cavity identification.
As a control of each cavity during production, the above quantity
of parts from each cavity shall be inspected after continuous
production of each 5,000 parts or at the end of each week,
whichever occurs first. Of the sample, one (1) part shall be the
last produced. If any defective parts are found during
qualification of the cavity, the cavity producing the defective
part will not be used in production. If any defective parts are
found when inspection is performed for the control of the cavity,
the cavity producing the defective part shall be removed from
production. Further, that portion of production since the last
control check shall be returned to the contractor for inspection
for each type of defect according to the level specified in the
classification of defects. All cavities removed from production
because of some fault, may after reworking be returned to
production provided they pass the qualification test above. The
contractor may request a change of inspection frequency provided
he presents objective evidence to the contracting officer to
substantiate the request.
In establishing a curing time, dimensionally check ten
NOTE 1:
(10) part s from each cavity at periodic intervals (e.g.
every 30, 60, etc. mins.) until dimensional stability is
attained. The curing time will be from the time the
part comes out of the mold until dimensional stability
is attained. The inspection data used in determining
the curing time shall be available for inspection if
required. If there is a change in material, or in the
cycle time, or if a cavity is reworked, or a new cavity
is used, a new curing time shall be established and
approved.
Mold samples may be returned to the lot after
NOTE 2:
inspection.
4.5.3 Spring embrittlement. The spring shall be stretched
along its longitudinal axis in the case of a coil spring, or bent
in the case of a flat spring until the spring no longer returns
to its original position. When the spring no longer returns to
its original length or profile, it shall be considered distorted
Any spring that breaks prior to this point shall be
permanently.
classed defective. One defect shall be cause for lot rejection.
4.5.4 Setback weight spring set. The spring shall be
measured at its original free length, assembled in a restraining
fixture in accordance with 4.4.3 and compressed to a normal
height of .750 inches, placed in an oven and subjected to a
temperature of not more than 180F or less than 175F for 24
hours. The spring shall be removed from the oven and cooled to
ambient temperature. After cooling the spring for 24 hours
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