Fastener Manufacturing & Thread Rolling worked example

Coating Thickness Margin with measured coating thickness of 25 µm: a worked example

Push measured coating thickness up to 25 µm and the picture changes. This example computes every intermediate figure at that operating point. Use it when reviewing zinc, zinc-nickel, phosphate, black oxide, passivation, or sealer thickness against a customer or print requirement.

The inputs for this scenario

  • Measured coating thickness: 25 µm (raised for this scenario; the documented default is 10)
  • Required minimum coating thickness: 8 µm (unchanged)
  • Reference coating requirement: 8 µm (unchanged)

Working through the calculation

  • Applying the documented formula (Coating thickness margin = measured coating thickness - required minimum coating thickness) to the inputs above produces each figure below.
  • At this operating point the engine returns 213 % for coating thickness margin, the number this scenario is built around.
  • At this operating point the engine returns 17 µm for thickness above minimum.
  • At this operating point the engine returns 25 µm for measured thickness.
  • At this operating point the engine returns 8 µm for required minimum.

How this compares with the baseline

  • Against the tool's baseline example, where measured coating thickness sits at 10 µm and the headline result is 25 %, this scenario comes in 750% above the baseline at 213 %.
  • It computes the coating thickness above your required minimum and expresses that surplus as a percentage of the reference coating requirement. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Coating thickness margin: 213 % (headline result)
  • Thickness above minimum: 17 µm
  • Measured thickness: 25 µm
  • Required minimum: 8 µm

Run it with your numbers

  • Every input above is editable in the live Coating Thickness Margin calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.