Standard torque values for threaded fasteners

davidmxli

Inactive Registered Visitor
#1
Hi!
I work at a company where part of our products are cable & harnesses assemblies, as well as some eletrical racks.
My question is (and sorry if I didn't place it in the correct forum):
We have a requirement from one of our customers, that states: "If not specified by the customer, standard torque values must be used."

What are "standard torque values"? Is there any standard document where I can find some sort of table or further information on standard torque values?

Thanks in advance for any help provided.

Have a great day!
 
Elsmar Forum Sponsor

Jim Wynne

Leader
Admin
#2
Re: Standard torque values for threaded fasteners?

If that vague statement is a customer requirement, I strongly advise you to consult with the customer. They might have a different idea about what "standard" means.
 

davidmxli

Inactive Registered Visitor
#3
Re: Standard torque values for threaded fasteners?

Yes, I understand, that was kind of my thought, but I was wondering if by any chance there is a SAE, ASTM or another recognized standard with values for torquing
 

Jim Wynne

Leader
Admin
#4
Re: Standard torque values for threaded fasteners?

Torque values are controlled by a lot of variables, such as fastener material composition, the material composition of the thing(s) being fastened, safety considerations exclusive to a given assembly, clamp load requirements which might include washers, etc. etc.

There is no one-size-fits-all standard.
 

normzone

Trusted Information Resource
#5
Re: Standard torque values for threaded fasteners?

Yes. If left to your own devices, you could develop a set of requirements based on researching and sorting out all the variables listed above, which is probably what your customer hopes you will do so they don't have to do it.

The good news is that in your industry/product line(s) the variables are limited and once you've done the homework, you should come away with some values you can consistently apply for given fasteners in given situations. The bad news is that this is a homework project for somebody.
 

davidmxli

Inactive Registered Visitor
#6
Re: Standard torque values for threaded fasteners?

Ok, I get it :)
Any clues or suggestions where can I search to begin with this homework?
 

dgriffith

Quite Involved in Discussions
#7
There was a thread just recently about whether to torque the head or nut on a nut/bolt assy. Search the forum. It's not too old.

During that thread, I searched the ENTIRE INTERNET, it seemed like... try 'fasteners'.
As stated, many variables. The material you are clamping together, the use of washer of not, fastener materials, etc.

Very little of the torque applied goes to actual clamping force. Most is eaten up in frictional forces-- the bolt head rotating against the material (hence, use a washer or no washer?), threads against mating threads ("lock-tite", lubricants, etc.) and so on.
 
P

PaulJSmith

#8
Re: Standard torque values for threaded fasteners?

As Jim stated above, I would suggest you begin your search with a phone call to your customer's Supplier Quality Engineer.

If they are unable or unwilling to offer their advice (which is unlikely), then your fastener supplier(s) should be able to provide you with the ratings for their fasteners.

If you are using them on softer materials such as composites, well, that's a whole different ballgame requiring the input of the engineers who designed that material.
 
Thread starter Similar threads Forum Replies Date
A TYPE B Uncertainity - Torque standard calibration - How do you get the factors? General Measurement Device and Calibration Topics 1
D Is it required to have the operator initial their work in the IATF 16949:2016 standard? IATF 16949 - Automotive Quality Systems Standard 3
S FCC Part 15, 18 harmonized to a standard? Various Other Specifications, Standards, and related Requirements 3
H Is CLSI H7-A3:2000 standard edition currently valid? Other Medical Device Related Standards 0
N Upgrading obsolete standard - how to? General Measurement Device and Calibration Topics 3
Q VDA Standard - VDA FMEA VDA Standards - Germany's Automotive Standards 11
M Preservation of Raw Materials in ISO 9001:2015 Standard ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 12
Strange Juan HP 85054B Standard Mechanical Calibration Kit Calibration Procedure General Measurement Device and Calibration Topics 1
U Leakage test Standard for Medical Device IEC 60601 - Medical Electrical Equipment Safety Standards Series 3
P Medical device testing lab/service standard Other Medical Device Related Standards 1
V Is it required to recalibrate reference- standard instruments after equipment qualification General Measurement Device and Calibration Topics 0
R Quantity Discrepancy Tolerance Standard(s)? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 5
S Additional registration requirements for different EU-states on top of standard CE-registration? EU Medical Device Regulations 3
T Is there any DIN EN 10204 equivalent to AISI standard ? ISO 13485:2016 - Medical Device Quality Management Systems 0
S How to determine sample size to test when the acceptance criteria is x >= Standard value? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 7
A Industry standard for stamped part Various Other Specifications, Standards, and related Requirements 2
B Wrong standard deviation calculation in AIAG SPC manual? Capability, Accuracy and Stability - Processes, Machines, etc. 13
S Is the ISO/SAE 21434 a certifiable standard? IATF 16949 - Automotive Quality Systems Standard 3
keya1tos EU to UK plug adapter correct testing standard CE Marking (Conformité Européene) / CB Scheme 9
H Harmonized Standard for the refrigerated lab device safety CE Marking (Conformité Européene) / CB Scheme 2
N Misc Calibration Standard Inquiry Various Other Specifications, Standards, and related Requirements 5
N QMS standard for a research based Organisation Quality Manager and Management Related Issues 1
I VDA Standard search VDA Standards - Germany's Automotive Standards 1
Q Which Kapt standard assignment ISO 9001:2015? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
S Measurement of threaded holes ISO10578 or ASME standard Measurement Uncertainty (MU) 3
C Calibration Procedures and ASTM CALIBRATION standard General Measurement Device and Calibration Topics 7
Sidney Vianna Informational ISO/CD 7101 Health Care Quality Management System Standard Hospitals, Clinics & other Health Care Providers 0
D Technical Standard aggregator company suggestions AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
lanley liao Confusion between national standard and API related standard. Oil and Gas Industry Standards and Regulations 8
E Comparison of Respiratory Protective Equipment Standards (China Standard Compare with EU standard of EN149 Occupational Health & Safety Management Standards 2
Ajit Basrur Any ISO standard or guidance documents on barcode and scanning? Other Medical Device Related Standards 1
J External Standard Services Document Control Systems, Procedures, Forms and Templates 12
B IVDR Electrical safety standard EU Medical Device Regulations 0
B ISO13485 Standard Documentation Packages ISO 13485:2016 - Medical Device Quality Management Systems 2
S ISO/IEC 15408 - Is this is Certifiable Standard? Other ISO and International Standards and European Regulations 2
C Requirement for Revision of Standard in all Documentation ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 5
M Lighting Standard for Metal Processing Inspection Manufacturing and Related Processes 4
F USB-IF standard EU Medical Device Regulations 0
F Is USB-IF standard compliant with ISO13485? Medical Device and FDA Regulations and Standards News 3
A Is there a standard on tolerances of substances ? Medical Device and FDA Regulations and Standards News 1
P Pooled Standard Error - Minitab Statistical Analysis Tools, Techniques and SPC 0
SABRINA DJILALI SAIAH Implementation of the ISAS-MEDIA 9001 standard in a TV channel ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 7
Sidney Vianna Interesting Discussion Should ISO 9004 be changed from a guidance document to a requirements standard? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 13
B European Harmonized vs IEC standard IEC 62366 - Medical Device Usability Engineering 2
Moumen H Variations between ASTM A29 Standard for steel bars and Mill test certificates specs Manufacturing and Related Processes 1
D Which ISO Standard to purchase? ISO 13485:2016 - Medical Device Quality Management Systems 7
K IEC 60601-1:2005/AMD2:2020, Why this standard version is 3.0? IEC 60601 - Medical Electrical Equipment Safety Standards Series 2
C Standard -Machinist Handbook Customer Complaints 4
N EN 813, EN 12277, EN 1497 - Testing some harness prototypes to an EN standard Various Other Specifications, Standards, and related Requirements 0
R Remote Audits for ISO 9001 (or any other standard) General Auditing Discussions 31

Similar threads

Top Bottom