MIL-P-50601A(MU)
3.
REQUIREMENTS
3.1 Materials.-Materials shall be in accordance with applicable drawings
and specification. Prior to producing projectile bodies from a heat of
steel, the contractor shall have bar stock verification tests conducted,
in a manner acceptable to the Government, to establish that the bar stock
meets the requirement of MIL-S-46070.
3.2 Parts and assembly. -The parts and assemblies shall be in accordance
with all the requirements of Drawing (Dwg.) D11731537 and with all require-
ments of the drawings and specification shown thereon.
3.3 First Article Sample.-Unless otherwise directed by the contracting
officer, a first article sample shall be required.
3.4 Manufacturing process. -All parts and assemblies shall be manufactured
by a process approved by the contracting officer and no deviation from that
process shall be made without his prior approval.
(See 6.4)
3.5 Banding. -The rotating band blank and the rotating band seat shall be
clean at the time of banding. Shot or sandblasting shall not be used to
clean the serrated band seat after knurling. The rotating band blank shall
fill the band seat.
3.6 Soundness. -Metal discontinuity in the projectile body, as determined
by eddy current inspection, shall be less than that represented by Production
Check Standard (PCS) No. 1.
3.7 Projectile nose torque. -The nose of the projectile shall withstand a
minimum torque as specified by Dwg. D11731537.
3.8 Protective coating.
3.8.1 Phosphate coating.-The pretreatment process used shall be in accor-
dance with the applicable requirements of Dwg. D10542658. The phosphate
coating shall be in accordance with the requirements of TT-C-490 for appear-
ance and minimum weight, as applicable to the type of phosphate coating used.
3.8.2 Paint adhesion.-The painted exterior of the body shall meet the
requirements of TT-C-490 for adhesion.
3.8.3 Corrosion resistance. -The painted exterior of the body assembly shall
show no evidence of corrosion (red rust) after exposure to a 5 percent solu-
tion of atomized salt spray for 24 hours.
3.9 Metal parts security. -The sample projectile, metal parts, when assembled
into cartridges having a mean instrumental velocity at 78 feet of 3450 ± 25
feet per second (fps), shall not separate or break up in the metal parts
security test.
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