Prufi
PRU-260Declared input

Qualified thread pitch diameter outside finished interval

Machining · Sheet metal · Casting · Additive manufacturing · Hot-dip galvanizing

Scope and limits

Explicit qualified pre-coating pitch diameter plus/minus 4 times uniform normal electroless nickel thickness for declared 60-degree metric thread; selected simplified full cylinder establishes only internal/external location and material side. Finished min/max PD limits declared. No PD derived from CAD bore/shaft radius; no thread class or strength assessment.

Standards and references

MICRON-THREAD-COATING-2026

Micron: dimensional tolerances and plating treatments

Source scope
Uniform electroless nickel buildup on explicitly declared 60-degree metric thread flanks.
Implementation in Prufi
Electroless nickel section states thread diametral effect 4times coating thickness. PRU260 uses qualified declared pre-coat pitch diameter and normal flank thickness; compares internal minus 4t/external plus 4t to drawing min/max. Simplified CAD cylinder only identifies selected role, never PD.

BOSSARD-METRIC-PROFILE-2023

Bossard: Metric ISO threads, F.088

Source scope
Metric ISO thread 60-degree basic profile and separate major, minor and pitch diameters.
Implementation in Prufi
Source 2023.05 F.088 profile diagram. Only explicitly declared metric 60-degree profile admitted. No ISO965 class tables or ISO724 PD calculation encoded.

STEP examples for this check

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