Prufi
PRU-111Declared input

PEM nut minimum sheet thickness

Sheet metal · Machining

Scope and limits

Distance between the two host planes of the declared through-hole, compared with its shank-code table row.

Standards and references

PEM CL:2026

PennEngineering self-clinching nuts bulletin CL

Source scope
Manufacturer mounting data for explicitly declared metric PEM nuts: S/CLS/SP M3/M4/M6 and SS/CLSS/SP M5, supported shank codes 0/1/2. Adds verified M2.5 metric row for S/CLS/SP shank0/1/2 and exact CLS-M2.5-0/-1/-2 catalogue identity selection. No inferred finish suffixes; explicit conflicting selectors rejected. Data pinned to CLcopyright2026 printedCL-5, millimetres.
Implementation in Prufi
PRU-110..113 compare selected through-bore nominal diameter (+0.08/-0.00), local host-plane spacing, center-to-free-edge distance and explicit HRB hardness. M6 SP shank 0 is unavailable. Missing hardness remains unassessed. No installed hardware, thread strength, force, torque-out or conformity verification. PRU-110 explicitly reports unsupported selections as INFO. Geometric mount checks require exactly one solid. Edge clearance is the exact minimum center-to-outer-wire distance on either host plane, conservative for unequal stepped outlines. Exact identities resolve into existing PEM geometry predicates PRU110/111/112 and existing compatibility/process screens; no new rule count. Source product rows and catalogueURLs retained in research package; no licensed standards dimensions guessed.

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