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|  MIL-F- 14252( AR )
3.13 Workmanship. - Workmanship of fire-control equipment shall
be of a quali ty consistent with the highest existing production
staandards and shall embody best instrument practices consistent
with the intended use of the Item, All finished surfaces shall
be protected against corrosion (see 3.9) or injury during manu-
facture. All fins and other extra metal shall be removed from
castings and forgings. All surfaces shall be free from burrs
(see 3.8.1). Workmanship on spare parts and assemblies shall be
such that no operations such as burring, snagging, breaking of
sharp corners and edges, cleaning of chips and foreign matter
other than preservatives,need be done by Ordnance maintenance
personnel. All material shall be sound, of uniform quality and
condition, and free from seams, cracks, and other defects which
affect the strength, erdurance, or wear of the
may
adversly
part. Any material hammered, filed, or treated in any other
manner to conceal defects therein, shall be subject to immediate
rejection. Welding or other methods of repairing defects In
materials shall not be performed unless specifically authorized
by the contracting officer.
3.13.1 Moving parts .- All moving parts shall function properly
without Irregularities es and excessive mechanical noise and shall
conform to the specified torque values for the corresponding
temperature requirements.
3.13.2 Securing screws. - Screws used for maintaining adjustment
shall he secured by staking, use of dowel sets, pinning,
by Coating the threads and/or uder the heads with an approved
sealing compound to prevent vibrating loose. The use of shellac
is specifically forbidden. Self-locking screws may be used where
frequent disassembly is not required. The heads of flat head
Screws shall be flush
or slightly below the surface.
Unless
otherwise
specif:ed, all exterior headless screws, except ad-
justing screws, shall be covered with sealing compound conform-
ing to the requirements of Specifications MIL-S-I103O, type I,
class 1, or MIL-S-l1031, whichever is applicable.
3.13.3 Rivets-
After riveting,
the joined parts shall be tight
and undamaged and rivet heads shall be properly seated against
their surface.
3.13.4 Clearing. - All interior parts and bearing surfaces of
cleaned, dried, and freed
from
i n s t r u m e n t a l b e thoroughly
dust, burrs, chips. and grinding compound before lubrication
or assembly. G r i n d i n g compounds that will Impregnate or adver-
sely affsct the specified finish shall not be used. Metal parts,
after fabrication shall be cleaned in accordance with good com-
mercial ~r~cx.its} or as specified In an applicable document.
Cleaning processes shall have no visible or latent deleterious
effect on the equipment. Corrosive material shall be removed
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