What is Form, Fit, and Function (FFF)?

Form, Fit, and Function Definition

Form, fit, and function (FFF or F3) define the parameters that set the characteristics of a part:

  • Form: The shape, size, dimensions, mass, weight, and other visual parameters that uniquely distinguish a part.
  • Fit: The ability of a part to physically interface with, connect to, or become an integral part of another part.
  • Function: The action or actions that a part is designed to perform.

When you consider whether to introduce a new part number or create a new revision for an existing part number—it’s important to consider and follow the form, fit, and function guidelines.

What is Form, Fit, and Function

FAQs

Why is form fit and function important?

FFF content is being added. Stay tuned.

What is form fit function data?

FFF content is being added. Stay tuned.

What is the difference between form and fit?

FFF content is being added. Stay tuned.

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Related Terms

  • Interchangeable Products
  • Parameters
  • Revision
  • Reidentification
  • Manufacturer’s Part Number (MPN)