MIL-DTL-18714F (OS)
TABLE XII. Conformance inspection by classification of characteristics for bridge wire assembly, drawing number 2434752 Continued
Conformance
Requirement
Inspection Method
Classification
Examination or Test
Criteria
Paragraph
Reference
3.2
AIE
Level IV
Note 11: Distance from outer surface of ignition cup insulator to the outer
M108
edge of the assembly (datum A), see detail A, shall be .047 minimum.
Note 12B: The wire shall have an electrical resistance ranging from 28 to
M109
3.2, 3.5 & 3.6
COC
Level IV
31 ohms/foot at 20°C.
Note 12C: Material: The wire shall be an alloy of 90% platinum, and 10%
M110
3.2
COC
Level IV
iridium, in accordance with ASTM B684 paragraph 5 (chemical
requirements).
The wire shall be capable of withstanding a .375 lb (6 oz) tension test
M111
3.2
Level IV
COC
without breaking when tested per ASTM F219 paragraph 9.1 (tension test
apparatus) with a 12 inch gage length at a traverse rate of 12 inches per
minute.
Minor
Note 13: Solder, find no. 3, and flux, find no. 4, shall be IAW IPC J-STD-006
201
Level II
COC
3.2
and IPC J-STD-004. Solder form is optional, impurity level B or C. Solder
shall be one of the following alloys: Sn60Pb40, Sn62Pb36Ag2, or
Sn63Pb37.
Note 2: Solder bridge-wire, find no. 2, to the ignition cup and electrode assy,
202
Level II
AIE
3.2
find no. 1, IAW IPC J-STD-001. Solder in three places as shown in main
view note 2, using solder and flux, find 3 and 4. Residual flux must be
washed off.
Note 5: There shall be no solder flux or extraneous materials on the
203
Level II
AIE
3.2
completed assembly.
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