MIL-P-50601A(MU)
4.4.3.6 Projectile, 20mm, metal parts assembly (see Dwgs. D10542658 and
D11731537)
Categories and Defects
Method of Inspection
None defined.
Critical:
Major:
Diameter, bourrelet, max. ------------------------------
101.
Gage
Diameter, body, rear rotating band, max. ---------------
102.
Gage
Diameter, metering disc cavity, min. -------------------
103.
Gage
Diameter, tracer cavity, min. -------------------------
104.
Gage
105.
Depth, crimp lip to bottom of tracer cavity, min. ------
Gage
106.
Length, nose to rear of rotating band, max. ------------
Gage
Weight -------------------------------------------------
Scale
107.
Minor:
Overall length, max. -----------------------------------
201.
Gage
Paint not dry ------------------------------------------
Tactile
202.
203.
Marking incorrect, incomplete, illegible or missing ----
Visual
Paint on rotating band --------------------------------
Visual
204.
Rotating band damaged ----------------------------------
Visual
205.
Exterior paint inadequate ----------------------------
Visual
206.
Foreign matter on exterior ----------------------------
207.
Visual
MIL-STD-651 shall apply in defining and evaluating visual defects.
A rotating band blank which is deformed or judged to lack sufficient metal
in any part of its width or thickness to provide for complete band seat fill
and minimum rotating band profile dimensions shall be classed a defect.
Measurement of knurling for compliance with the minimum depth and width
requirements shall apply where visual inspection indicates that either
dimension is borderline.
Measurement of surface roughness shall apply where visual inspection
indicates that the specified finish is exceeded.
An assembly that has foreign matter on the exterior or contained in the
threads or body shall be classed a defect. Particular attention shall be
given to the examination of the cavities for steel chips or shavings.
4.4.4 Tests.-The tests listed in Table I shall be performed on each projectile
lot in accordance with the test methods prescribed in 4.5. Sample size and
acceptance criteria for each test shall be as specified. Only projectiles
having met the visual and dimensional requirements and having been selected
in such a manner that the sample is representative of the entire lot shall
be used in the tests. The selected projectiles shall be thoroughly mixed
before being divided into samples for the various tests.
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