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|  MIL-C-21679(NOrd)
3.1.4 Interchangeability. - Component parts of assembled
units (unless otherwise specified on the applicable drawings)
fabricated in strict agreement with their applicable draw-
ings shall be interchangeable and shall assemble with mating
components of the unit without selection or fitting. If,
during assembly of the fabricated parts of a unit, selection
or fitting is required and changes in dimensions are necessary,
no changes in the parts as delineated on applicable drawings
shall be made without prior approval of the Bureau of Ordnance.
3.1.5 Conflicting requirements. - Conflicting require-
ments arising between this specification and any other speci-
fications, publications or drawings listed herein shall be
referred in writing to th e procuring agency or appointed agent
for interpretation and clarification.
3.2 Performance requirements and product characteristics.
The mechanism covered by this specification shall meet the
following performance requirements and product characteristics.
3.2.1 Soldering. - Unless otherwise specified, solder-
ing processes shall conform to the requirements specified in
Military Specification MIL-S-6872. Electrical connections
shall be mechanically secure before soldering wherever possible.
Only rosin flux containing no acid shall be used. The use of
rosin-core solder is permitted.
3.2.2 Lubrication. - Special purpose oils, which have
been tested and. accepted, shall be used to lubricate the
Mainspring and the Gear Train. See 6.2 and 6.3.
3.2.3 Assembly nuts. - Before tightening the nuts which
secure the case, the nuts for the pillar studs which pro-
trude from the bottom plate shall be secured with a torque
of 10.5 .5 pound-inches.
CAUTION: These nuts should not be loosened until
the mechanism is ready for final assembly on a
clock starter.
All other No. 8 nuts shall be secured with a torque of 10.5
.5 pound-inches with the exception of the cover retaining
nuts-which shall be secured with a torque of 4.5 .5 pound-
inches. See 4.6.1.2.
3.2.4 Components. - The following specific requirements
apply to the indicated-components.
3
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