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DOD-STD-1372B(SH)
1
November 1977
EDING
M2:ST>1373A(SHIPS)
17 may 1973
M2L2TARY STANDARD
INSPECTION PROCSDURS FQR USE OF ANASRDSIC THREAD LOCKING COMPOUNDS WITS STUDS
‘ThisMilitaxy Stsndsrd is approved for use by the Naval Sea
SysternsComman
d, Department of the Navy, and is available
for use by all Departments snd Agencies of the Depart!csnt of
Defense.
1. SCOPE
1.1 This standard nrovides an inspectionnrocedure to assure that studs
installed with
&n anaerobic thread locking ccnnpoundha;e achie;ed the necessary backout
.2. REFERENCED DDCIN5NTS
GOVSRS4WSNTAL
M21XTARY
3423,+-22473 - sealing,
.Locking, and -tsining compounds;
resistance.
Single-Component.
(Copies of specifications,standards, drawings,and publicationsrequired by contractors
in connection with
specific procurement functions should be obtained from the procuring
.s+ctivityor as .tirectedby the contracting offic.sr.)
3. GSNESAL REQU13W4SNT
3.1 App2icatim of maernbic compounds, :as spectfied in M22+S.-2.2473used .asm method
:for locking threaded fasseners, shall .be.inaccordan= with the anaerobic compound manufae
‘curer‘.srecommended proqedunes.
.
4.
INSPECTION PROCEDUSX
4.1 Responsibility for inspection. Unless otherwise sp.scified ‘in the contract, the
contractor is responsib e=r
herein.
the performance of all inspection requireusnts aa specified
4.2 Each organization shall maintain u inspection syB ten!to assore the Naval Sea
Systems Command or its authorized
representativethat all of the requirementsof this
standard are being met .where.veranaerobic compounds :are used fOr locking fireaded f~~ners.
4.3 Stud installation inspection.
—.
4.3.1 Inspection of fastener locking effectiveness
of anaerobic compounds, after
ma.nufacturer recommenced setting period, shall be in accordance with the following:
(a) WitneSS iIIStallatlOn and reUiOvalthrough a distance of three threads beyond
the locking element of previously unused nut (annular plastic ring locking
element type) on two studs in each joint bolt circle containing more than
three studs.
Studs selected shall be located 180 degrees apart or as close
thereto as ~ssible.
Only one stud ,shall be examined in applications having
three studs
.or less.
(b) The assembly shall be accepted if no turning motion of the studs is obse~ed
during nut installation or removal.
Also, the assemblY shall be accepted
if a slight initial turning motion (up to 1/4 turn) of the studs is observed,
snd no further turning motion of the studs is observed, during nut installa-
tion
or removal.
Studs shall not be restrained from turning during the test
by any method other than the Locking compound in the set end of the stud.
Beneficial comments (recommendations, additions, deletions ) and any pertinent
data which may be of use in i!wroving this document should be addressed to:
Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy ,
Washington, DC 20362 by using the self-addressed Standardization Document
Improvement Proposal (DD Form 1426) appearing at the end of this dOc~ent Or
by letter.
FSC 8030
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