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What Premium unlocks
- Port list with no line limit - one sheet listing every connection on a machine with its thread, threads per inch or pitch, seat, which half is on the machine, and its published working pressure where one exists. A free port list holds 4 lines.
- Saved lists, one per machine, instead of the 1 a free plan keeps - named, stored in your browser, no account and no upload.
- Print the port list as a job sheet or save it as a PDF, and export it as CSV for a parts order or a work order.
- 6 printable identification charts covering all 110 sizes across 10 standards - the SAE inch families, pipe threads, both metric series, the Japanese connections, a one-page seat and thread decision sheet, and every published working pressure with the conditions it applies under. Laid out for paper: black on white, column headers repeating at the top of every page, banded rows, no row split across a page break, landscape where the sheet needs it.
Weekly, yearly and lifetime plans are available.
Every one of the 110 fitting pages stays free: all dimensions, the measured span a caliper actually reads, the seat, what it mates with, what it can be confused with, every published pressure rating and the conditions it applies under, and the sources behind each figure. So do the identify flow, every comparison page, every guide, and a working port list of 4 lines you can build, save and read in full. Every figure printed on a chart is free to read on the size page it came from, and a sample of each sheet renders for everyone.
Premium plans are launching soon. In the meantime the port list and the identification charts are open to everyone, alongside the full free reference.
What stays free?
All 110 fitting pages - every dimension, the span a caliper actually reads, the seat, what the fitting mates with, what it can be confused with, every published pressure rating and the conditions it applies under, and the sources behind each figure. So does the identify flow, every comparison page, every guide, and a working port list of 4 lines you can build, save and read in full. That is the whole reference plus a real sample of the artifact, with no account needed.
What does Premium add?
Two things. First, the port list without its 4-line ceiling: a whole machine on one sheet, a saved list per machine instead of 1, printed or saved as a PDF, and exported as CSV. Second, the printable identification charts: 6 sheets that put the reference on paper, covering all 110 sizes across 10 standards, including a one-page seat and thread decision sheet and every published working pressure with its conditions.
Why would I pay for a port list?
Because the sheet is the work product and a browser tab is not. A size page answers one connection; a re-hose has fifteen, often across three or four different standards on the same machine, each with its own thread, seat and rating. The port list is that document - your locations, your quantities, which half is on the machine - printed or exported so it can go to the counter and into the job folder. Every number on it is the same free number from the size pages, read from the same record, so a list line and a reference page can never disagree.
Why would I pay for a chart of numbers you give away?
Because paper is the format a web page cannot be. A browser tab is no use with oily hands beside a machine, and printing a size page gives you one size. The sheets are built for print: black on white, column headers repeating at the top of every page, no row split across a page break, a section heading never stranded at the foot of a page, landscape where the columns need it, and banded rows so you do not read across the wrong line. The numbers stay free - every one of them - and an unblurred sample of each sheet renders for everyone, so the layout can be judged before anyone decides.
What about sizes with no published pressure rating?
The charts and the port list both print not published for those, with a numbered footnote naming the source that stops there. 49 of the 110 sizes genuinely have no rating that two independent publishers agree on under conditions they both state, and five whole standards are in that position. A sheet that filled those cells with a plausible number would be worse than a sheet with a hole in it, and pressure is the one field where a confident wrong answer hurts somebody.
Are the numbers different in Premium?
No. The reference values are identical and free for everyone. Premium removes a volume ceiling and puts the tables and your job sheet on paper. It hides no data, and no figure on a paid sheet is unreadable for free on the size page it came from. Nothing safety-relevant is ever gated - not a pressure rating, not the conditions it applies under, not a warning that two fittings will screw together and leak.
How is my access stored?
Purchases are handled by RevenueCat and Stripe. An anonymous purchase id is kept in this browser so FittingKey recognises your Premium on this device. Keep your receipt email for recovery.
I already subscribed on another browser or device - how do I get Premium here?
Head to Restore access and paste the access code shown on this Premium page, or the one from your receipt. Premium moves to this browser instantly.
Can I cancel?
Yes. Subscriptions renew automatically and can be cancelled anytime from the link in your receipt email. Lifetime is a one-time payment.
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Your code is shown on this page whenever you are subscribed here, and it is in your purchase receipt email. If you cannot find it, reply to your receipt email from the address you paid with - your subscription is tied to it and access can be recovered from there.