Private fit check

Three small gauges.
One hard stop.

Measure the card end. Try c025 first. Never force it. A clean slide only unlocks a full prototype.

This checks one measured card-end envelope and collar corner. It is not fit or cooling proof.

Smallest first

Three clearances.

Start here

c025

0.25 mm per side. Slide on gently. Do not twist.

Next only

c050

0.50 mm per side. Try it only if c025 stops cleanly.

Last check

c075

0.75 mm per side. Unexpected play is a stop, not a pass.

Stop means stop

No forcing. No guessing.

1

Force

If it needs pressure, stop.

2

Scrape or rock

Any scraping or rocking ends the check.

3

Connector contact

If it touches a connector or cable, stop.

4

Clean result

It can unlock a full prototype. It never proves retention, seal, fan mounting, case room, power, noise, or cooling.

Exact cards only

Pick the label.

Quarkpad builds a private gauge pack from the exact label and measurements, then replies by email. Gauge files and shroud CAD stay off the public site.