ASTM D5649-01(2008)

Standard Test Method for Torque Strength of Adhesives Used on Threaded Fasteners

SIGNIFICANCE AND USE
This test method provides reasonably accurate information with regard to the determination of the securing or locking effect of adhesives used in threaded fasteners. This test method may also be used to determine the degree of cure and the effect of environment on torque strength.
The accuracy of the test results depends to a large degree on the thread clearance of the test fasteners and the inclusion of air bubbles in the bond line. Data generated by this test method should be safety-factored accordingly if used as quality assurance acceptance or rejection.
SCOPE
1.1 This test method is used to make comparative assessments of the securing or locking effect of adhesives used in threaded assemblies.  
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2008
• ICS: 21.060.01 - Fasteners in general
• ICS: 83.180 - Adhesives
• Technical Committee: D14 - Adhesives
• Drafting Committee: D14.60 - Adhesive Material Classification System

Relations

• Replaces: ASTM D5649-01 - Standard Test Method for Torque Strength of Adhesives Used on Threaded Fasteners
• Effective Date: 01-Apr-2008
• Referred By: ASTM D6465-99(2016) - Standard Guide for Selecting Aerospace and General Purpose Adhesives and Sealants
• Effective Date: 01-Apr-2008
• Referred By: ASTM D5363-16 - Standard Specification for Anaerobic Single-Component Adhesives (AN)
• Effective Date: 01-Apr-2008

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5649 − 01 (Reapproved2008)
Standard Test Method for
Torque Strength of Adhesives Used on Threaded Fasteners
This standard is issued under the fixed designation D5649; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2.3 prevailing torque, n—the torque measured after the
initial breakage of the bond measured at 180° rotation of the
1.1 This test method is used to make comparative assess-
nut.
ments of the securing or locking effect of adhesives used in
threaded assemblies.
4. Summary of Test Method
1.2 The values stated in inch-pound units are to be regarded
4.1 This test method consists of determining the torque
asstandard.Nootherunitsofmeasurementareincludedinthis
required to unscrew a bonded nut and bolt assembly. Break-
standard.
away torque and prevailing torque are determined.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 This test method provides reasonably accurate informa-
priate safety and health practices and determine the applica-
tionwithregardtothedeterminationofthesecuringorlocking
bility of regulatory limitations prior to use.
effectofadhesivesusedinthreadedfasteners.Thistestmethod
mayalsobeusedtodeterminethedegreeofcureandtheeffect
2. Referenced Documents
of environment on torque strength.
2.1 ASTM Standards:
5.2 The accuracy of the test results depends to a large
D907Terminology of Adhesives
degree on the thread clearance of the test fasteners and the
D2651GuideforPreparationofMetalSurfacesforAdhesive
inclusionofairbubblesinthebondline.Datageneratedbythis
Bonding
test method should be safety-factored accordingly if used as
E177Practice for Use of the Terms Precision and Bias in
quality assurance acceptance or rejection.
ASTM Test Methods
E691Practice for Conducting an Interlaboratory Study to
6. Apparatus
Determine the Precision of a Test Method
6.1 Electronic Recording—Test machine consisting of a
clamping device to secure the bolt head, and a device for
3. Terminology
turning the nut with simultaneous measurement and registra-
3.1 Definitions—For technical terms pertaining to
tionofthetorqueasafunctionoftheangleofturningbydirect
adhesives, see Terminology D907.
analog or digital means.
3.2 Definitions of Terms Specific to This Standard:
6.2 Direct Reading—A clamping device to secure the head
3.2.1 breakaway torque, n—the initial torque required to
of the bolt, and a torque wrench accurate to 65%.
breakthebondmeasuredatthefirstmovementbetweenthenut
and the bolt when unscrewing an unseated assembly. 7. Test Specimens
3.2.2 on torque, n—the maximum torque required to screw
7.1 Any size and substrate fasteners may be used upon
the nut onto a preapplied adhesive-coated bolt.
agreement between the supplier and the user of adhesives.
7.2 Unless otherwise agreed upon between the user and the
adhesive manufacturer, degrease all non-plated nuts and bolts
This test method is under the jurisdiction of ASTM Committee D14 on
(refer to Guide D2651), store in an atmosphere of low
Adhesives and is the direct responsibility of Subcommittee D14.60 on Adhesive
humidity, and keep them clean.
Material Classification System.
Current edition approved April 1, 2008. Published April 2008. Originally
7.3 Where desired, and if agreed upon between the user and
approved in 1994. Last previous edition approved in 2001 as D5649-01. DOI:
the adhesive manufacturer, non-plated nuts and bolts may be
10.1520/D5649-01R08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or used as received, reoiled, or after other special treatments.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.4 Platednutsandboltsdonotnormallyrequireanyspecial
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cleaning prior to assembly.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5649 − 01 (2008)
8. Assembly 10.1.1 Complete identification of the adhesive used, includ-
ing type, source, date manufactured, manufacturer’s code
8.1 Assemble not less than five specimens for each test as
number, and form,
follows:
10.1.2 Specimen size and substrate used,
8.1.1 Preassemble nuts and bolts prior to application of
10.1.3 Method of cleaning and surface preparation prior to
adhesive. Discard any pairs showing sticking due to burrs or
bonding,
damaged threads. Disassemble the parts.
10.1.4 Application and bonding conditions used in prepar-
8.1.2 For liquid adhesives, apply sufficient adhesive to the
ing the specimens,
bolt to completely cover an a
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5649–94 Designation:D5649–01(Reapproved2008)
Standard Test Method for
Torque Strength of Adhesives Used on Threaded Fasteners
This standard is issued under the fixed designation D 5649; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method is used to make comparative assessments of the securing or locking effect of adhesives used in threaded
assemblies.
1.2
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
standard.
1.3 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.
2. Referenced Documents
2.1 ASTM Standards:
D 907 Terminology of Adhesives
D 2651 Guide for Preparation of Metal Surfaces for Adhesive Bonding
E 177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E 691 Practice for Conducting an Interlaboratory Test Program Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions—For technical terms pertaining to adhesives, see Terminology D 907.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 breakaway torquebreakaway torque, n—the initial torque required to break the bond measured at the first movement
between the nut and the bolt when unscrewing an unseated assembly.
3.2.2 on torqueon torque, n—the maximum torque required to screw the nut onto a preapplied adhesive-coated bolt.
3.2.3 prevailing torqueprevailingtorque, n—thetorquemeasuredaftertheinitialbreakageofthebondmeasuredat180°rotation
of the nut.
4. Summary of Test Method
4.1 This test method consists of determining the torque required to unscrew a bonded nut and bolt assembly. Breakaway torque
and prevailing torque are determined.
5. Significance and Use
5.1 This test method provides reasonably accurate information with regard to the determination of the securing or locking effect
of adhesives used in threaded fasteners. This test method may also be used to determine the degree of cure and the effect of
environment on torque strength.
5.2 The accuracy of the test results depends to a large degree on the thread clearance of the test fasteners and the inclusion of
air bubbles in the bond line. Data generated by this test method should be safety-factored accordingly if used as quality assurance
acceptance or rejection.
This test method is under the jurisdiction ofASTM Committee D-14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on Metal BondingAdhesives
.
Current edition approved Dec. 15, 1994. Published February 1995.
This test method is under the jurisdiction of ASTM Committee D14 on Adhesives and is the direct responsibility of Subcommittee D14.60 on Adhesive Material
Classification System.
Current edition approved April 1, 2008. Published April 2008. Originally approved in 1994. Last previous edition approved in 2001 as D 5649 - 01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 15.06.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5649–01 (2008)
6. Apparatus
6.1 Electronic Recording—Test machine consisting of a clamping device to secure the bolt head, and a device for turning the
nut with simultaneous measurement and registration of the torque as a function of the angle of turning by direct analog or digital
means.
6.2 Direct Reading— A clamping device to secure the head of the bolt, and a torque wrench accurate to 65%.
7. Test Specimens
7.1 Any size and substrate fasteners may be used upon agreement between the supplier and the user of adhesives.
7.2 Unless otherwise agreed upon between the user and the adhesive manufacturer, degrease all non-plated nuts and bolts shall
be degreased (refer to Guide D 2651), storedstore in an atmosphere of low humidity, and keep them clean.
7.3 Where desired, and if agreed upon between the user and the adhesive manufacturer, non-plated nuts and bolts may be used
as received, reoiled, or after other special treatments.
7.4 Plated nuts and bolts do not normally require any special cleaning prior to assembly.
8. Assembly
8.1 Assemble not less than five specimens for each test as follows:
8.1.1Nuts and bolts shall be preassembled prior to application of adhesive.Any pairs showing sticking due to burrs or damaged
threads shall be discarded. Disassemble the parts.
8.1.1 Preassemble nuts and bolts prior to application of adhesive. Discard any pairs showing sticking due to burrs or damaged
threads. Disassemble the parts.
8.1.2 For liquid adhesives, apply sufficient adhesive to the bolt to completely cover an area equal to the height of the nut plus
three threads. Also, apply adhesive to the threads of the nut. Follow the adhesives manufacturer’s instructions for application of
preapplied adhesives.
8.1.3 Screw the nut onto the bolt by hand, allowing three threads to protrude. For preapplied adhesives, screw the nut onto the
coated bolt using the apparatus in 6.1 or 6.2
...