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|  MIL-F- 14252( AR)
Excess metal shall be removed
before acceptance of the Item.
from counter-sunk-head rivets.
is to be accomplish d
3 . 6 . 2 0 .2.1 Ferrous rivets - When riveti
by the pressure method, ferr ous rivets 3/ -inch diameter and
small mnay be driven cold. Ferrous rivet s larger than 3/8-inc h
diamet er shall be driven "hot unless specia 1 authorization IS
grante d by the contracting o fficer to do o therwlse.
Non-ferrous rivets.- Non-ferrous rivets shall be
3.6.20
.2.2
driven cold. Age-hardened aluminum-alloy rivets shall be driven
by heavy blows or high pressure to avoid hardening of the sur-
face before the head is formed and the hole completely filled.
Quenched or refrigerated aluminum-alloy rivets shall be driven
In accordance with approved engineering practice.
Use of standard ltems.- To facilitate Interchangeability
397
and mainter.ante of materiel, standard Items, such as hardware
(ruts, bolts, rivets, washers and pins ) electrical components
(resistors, capacitors-, relays, fuses, switches, electron tubes,
transformers, and meters ) and other standard parts shall con-
form to Ordnance Corps approved standard drawings. The contract-
or shall use the ordnance corps approved standard drawings and
The
contractor
is
not
requtred
the associated part numbers.
to prepare an individual drawing (
see 3.5) when Standards for
these items exist; however, standard drawing numbers shall ap-
pear on the tabulated List of Drawings" format and all assembly
drawings.
.3.7.1 Precedence of standard drawings. - The order of precedence
for filing materiel standards shall be as follows:
(a) Military Standards Preferred for Ordnance
(b) Ordnance Engineering Standards 1/ (commonly known
as "BEFAX" drawings)
Military Standards
Ordnance Divisional Standards, F12e -Control 1/
c
Ordnance Corps drawings for parts peculiar. If stand-
e
ard item are not included in c and d above, drawings
must then be screened through established channels
for possible duplicatlon.
These standards shall continue to be used for design and
engineering until the items have been replaced by Military
Standards.
24
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