Spring Catch - 7160949
Attaching Assembly, Load
Pin, Spring - Tubular, Slotted
Bearing Equipment End
Hexagon Socket Button
ASME/ANSI B 18.3
Head Cap Screw - .190-24x.44
Screw, Machine - MS51959-27B
Parts inadvertently damaged during interchange may be
replaced without penalty when authorized and verified
by the Government representative witnessing the test.
4.6.10 Latching mechanism functioning. The MPBS shall be
tested using a contractor designed, Government approved test
fixture (See Figures 1, 2 and 3). The MPBS shall be assembled to
the test fixture without manually depressing the latching lever.
The MPBS shall then be detached by manually depressing the latching
4.6.11 Firing. The bayonet shall be attached to an M16 series
Rifle. The weapon shall be hand held. A total of 90 rounds
consisting of three 30 round magazines shall be fired at the
maximum rate of fire. Upon completion of the test, the bayonet
shall be examined for damage or looseness. This test will be
conducted at a Government facility.
4.6.12 Serrated edqe. The serrated edge shall be used to make
a minimum cut 18 inches long in the material specified in 3.4.12.
A sawing motion shall be used. The time shall not exceed one
hour. Upon completion, the serrated edge shall be used to cut
one-half inch hemp rope.
4.6.13 Temperature extremes. The MPBS shall be conditioned in
a Government approved test chamber at the temperature specified in
3.4.13 for a minimum of two hours before testing begins. After the
MPBS is removed from the chamber, testing shall begin immediately.
After each test the MPBS shall be returned to the test chamber and
reconditioned for a period of one hour.
4.6.14 Hardness. Five (5) blades shall be selected from each
heat treatment batch (see Note). The test shall be performed as
specified in ASTM-E18. The scale used shall be the 15N scale. The
reading shall then be converted back to the Rockwell C scale. Each
heat treat batch shall remain segregated until completion of all
required tests. If any blade fails to comply with the specified
heat treatment and hardness requirement, the blade shall be
classified defective and the lot shall be rejected.
A heat treatment batch shall be defined as blades
that have been heat treated at the same time in the
same furnace and quench bath for each of all phases
of the entire heat treatment process.
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