ASTM F1179-88(2007)
(Practice)Standard Practice for Inspection Procedure for Use of Anaerobic Thread Locking Compounds with Studs
Standard Practice for Inspection Procedure for Use of Anaerobic Thread Locking Compounds with Studs
ABSTRACT
This practice covers an inspection procedure to ensure that studs installed with an anaerobic thread locking compound have achieved the necessary backout resistance. Verification of fastener locking effectiveness of anaerobic compounds shall be done. After inspection, the joint assembly shall be completed and final torque applied.
SCOPE
1.1 This practice covers an inspection procedure to ensure that studs installed with an anaerobic thread locking compound have achieved the necessary backout resistance.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: F1179 − 88 (Reapproved2007) An American National Standard
Standard Practice for
Inspection Procedure for Use of Anaerobic Thread Locking
Compounds with Studs
This standard is issued under the fixed designation F1179; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 Accept the assembly if no turning motion of the studs
is observed during nut installation or removal.Also, accept the
1.1 This practice covers an inspection procedure to ensure
assembly if a slight initial turning motion (up to ⁄4 turn) of the
that studs installed with an anaerobic thread locking compound
studs is observed, and no further turning motion of the studs is
have achieved the necessary backout resistance.
observed, during nut installation or removal. A small initial
1.2 This standard does not purport to address all of the
turning of the set stud represents a breaking or powdering of
safety concerns, if any, associated with its use. It is the
the locking compound which actually increases resistance to
responsibility of the user of this standard to establish appro-
any further turning motion.
priate safety and health practices and determine the applica-
3.1.2.1 Do not restrain studs from turning during the test by
bility of regulatory limitations prior to use.
any method other than the locking compound in the set end of
the stud.
2. General Requirements
3.1.3 Reject each stud assembly if the requirements for
2.1 Application of anaerobic compounds, used as a method
acceptance of 3.1.2 are not met. If one assembly is rejected, all
for locking threaded fasteners, shall be in accordance with the
studs in that bolt circle shall be similarly checked (see 3.1.1
anaerobic compound manufacturer’s recommendations.
and 3.1.2). Remove and clean all rejected studs in accordance
2.2 Responsibility for Inspection—Unless otherwise speci-
with the manufacturer’s recommended procedures, reinstall,
fied in the contract, the contractor is responsible for the
and reinspect.
performance of all inspection requirements as specified herein.
3.1.3.1 Reinspection shall consist of selecting two of the
2.3 Government Inspection System—For U.S. Navy
reinstalled studs, if four or more studs require reinstallation, or
procurements, each organization shall maintain an inspection
one stud if less than four studs require reinstallation, and
system to ensure that all of the requirements of this practice are
performing procedures 3.1.1, 3.1.2, and 3.1.3.
being met wherever anaerobic compounds are used for locking
3.1.4 If assembly is accepted after step 3.1.2, each stud in
threaded fasteners.
the bolt circle shall be permanently marked (scribe or electro-
etched) on the exposed end with a line oriented radially in
3. Stud Installation Verification
relation to the center of the bolt circle.
3.1 Verification of fastener locking effectiveness of anaero-
bic compounds, after the manufacturer’s recommended setting
4. Joint Assembly Inspection
period, shall be i
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