MIL-DTL-60547G (AR)
3.7 Ultrasonic test. Projectiles shall be free of any
discontinuities equal to or in excess of the ultrasonic
inspection criteria for the respective zones. The inspection
criteria are notches and holes in standards (on dwg. 12991876 and
dwg. 12991877) which simulate larger metal defects. Ultrasonic
inspection is to be performed in accordance with drawing 12991878
prior to band seat and thread machining.
3.8 Interior cavity finish. The interior cavity after
painting shall be free from bare spots, blisters, grease, dirt
and other foreign matter. There shall be no pool of paint in the
bottom of the cavity.
3.9 Workmanship.
The requirements for workmanship are as
follows:
3.9.1 Surface preparation. Preparation of metal surfaces
shall be as specified on drawing 10535878 for the M1, or drawing
12551740 for the M760. Where cleaning and preparation are
required by component details, the finish specified shall apply
to the indicated surfaces regardless of contour configuration.
3.9.2 Painting. Painting shall comply with the requirements
of drawing 10535876 for the M1, or drawing 12551742 for the M760.
All paint shall be dry to the touch before packing for shipment.
Drying time prior to packing shall be in accordance with drawing
10535876 for the M1, or drawing 12551742 for the M760.
3.9.3 Burr. No part shall have a burr which might interfere
with the assembly or function of the round or which might be
injurious to personnel handling the item.
3.9.4 Threads. The threads shall be full and undamaged for
the entire minimum length or depth as specified on drawing
10535878 for the M1, or drawing 12551740 for the M760.
3.9.5 Foreign matter. No part of the assembly shall contain
dirt, grease, chips, rust, corrosion or other foreign matter.
3.9.6 Protection of rotating band. The machined rotating
band shall be protected from being nicked, burred or otherwise
damaged in subsequent handling prior to shipment.
3.10 Ballistics test. The projectile assembly shall reveal
no evidence of metal parts failure. Metal parts failure shall be
defined as:
3.10.1 Breakup. There shall be no loss or breakup of metal
parts components in the gun bore or in flight.
3.10.2 Rotating band failure.
There shall be no loss or
fanning of the rotating band.
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