MIL-DTL-87174A(USAF)
4.5
Tests.
4.5.1 Materials and hardware examination. The materials and hardware used in the fabrication
and assembly of the HGU55/P helmet, and if applicable, the usedwith components (see 3.5),
shall be examined to determine compliance with the requirements of applicable specifications,
standards, and drawings.
4.5.2 Dimensional examination of molded shell. The dimensional examination of the unpainted
molded shell shall be in accordance with applicable drawings and the following shall be checked:
a.
All hole sizes and location dimensions.
b.
Shell thickness at four random locations along the edge contour and at six widely
scattered locations along each half of the shell (right and left). The average
thickness of the 10 locations shall be within the limits specified in 3.2.2.
c.
Overall shell width at the center references dimples and the overall shell height at
butt-line 0.00 on Drawing 81D5332 for size medium, Drawing 81D5333 for size
large, and Drawing 81D5334 for size extralarge. Each dimension shall be within
0.25 inches of the specified total.
d.
The overall shell width at the front edge contour at the following specified water lines. Each
dimension shall be within 0.25 inches of the specified total.
Size medium:
water line 1.50 and 3.50
Size large:
water line 1.00 and 3.00
Size extra large:
water line 1.00 and 3.00
4.5.3 In-process examination. Visual inspections shall be made during the manufacturing process
for defects as specified in table IV.
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