MIL-DTL-45468F(AR)
4.3.4 Pull test of the lead wires. The plug assembly shall be tested with the specified
load applied. Any plug assembly that shows evidence of slippage of either lead wire within the
plug shall be classed defective and shall reject the lot.
4.3.5 Resistance of bridge wire and wire leads. The electrical resistance of the cap,
including the leads, shall be measured as specified using a test current not to exceed 0.020
Ampere. Any assembly which fails to comply with the applicable requirement shall be classed
defective and shall reject the lot.
4.3.6 No-fire (critical). The blasting cap shall be assembled to a suitable test fixture and
an electric current of 0.20 to 0.21 Ampere shall be applied singularly to each cap for a period of
5 seconds. No reaction of the cap shall be considered a success for this test.
4.3.7 Waterproofness. The cap assemblies shall be completely immersed in water for
not less than four (4) hours at a temperature of 70 degrees plus or minus 5 degrees Fahrenheit,
and a pressure of 50 plus 0.50 pounds per square inch gauge. Within four hours of removal from
the water, the sample caps shall be subjected to function tests in accordance with Table II, Figure
1, and 4.3.8.
4.3.8 Functioning. Prior to functioning, check for conformance that the lead wires are
shunted and that the caps are not split, cracked, or show evidence of explosive leakage in
accordance with 4.3.2.5. The requirements of 3.9 shall be verified by puncturing a lead disc in
the following demonstration. The lead discs used in this test shall be made of 8 pound sheet lead
complying with ASTM B 749 for Lead Sheet material, and shall be 0.1345 inch min. thickness
and 1.22 - .01 inch in diameter. The disc shall be centered over a 15/16 inch diameter hole in a
metal support. The cap shall be suitably fixed in an upright position, with its bottom resting on
the unsupported section of the lead disc. The cap shall be fired in accordance with one of the
following initiation methods.
4.3.8.1 Ampere initiation of single cap. Using the test method described in 4.3.8, the cap
shall be fired in accordance with 3.9.1. Observation shall be made for complete detonation of
the cap as evidenced by perforation of the lead disc.
4.3.8.2 Milliwatt-second initiation of single cap. Using the test method described in
4.3.8, the cap shall be fired in accordance with 3.9.2. Observation shall be made for complete
detonation of the cap as evidence by perforation of the lead disc.
4.3.8.3 50 caps in series. Fifty (50) M6 blasting caps shall be connected in series and
initiated by applying current of 1.50 Ampere from power source. Suitable equipment to measure
and control DC electric power shall be used, as well as equipment capable of measuring to the
nearest millisecond the time from application to detonation of the blasting cap. Five (5)
randomly selected blasting caps in the series shall have their explosive output verified by
perforation of a lead disc as described in 4.3.8. Verify that all caps have functioned high-order.
4.3.8.4 Four (4) caps in series. Four (4) M6 blasting caps shall be connected in series
and initiated in accordance with 3.9.4. One (1) cap shall be selected to have explosive output
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