No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989

-----

Fastener nomenclature question

What are the meanings of the four digit numbers in fasteners? Ex: 4140

Ryan Anderson
employee - Shawnee, KS USA
December 20, 2009

While the context can change meaning, whenever I see "4140" in a parts specification I first consider that it refers to the steel alloy used to make the part. 4140 is a common designation for an alloy steel in North American designation systems. If that makes sense within the context of your question, it's the meaning I'd give most credence to.

Lee Gearhart
metallurgist - E. Aurora, New York
December 30, 2009

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: