ThreadRef

ThreadRef Premium

Work faster at the bench.

Keep the free size reference and tools, or go further: printable shop charts, saved favourites, a custom chart builder, and a bolt-torque calculator that accounts for lubrication — all in your browser.

Browse the free referenceTry the torque estimate

Choose a plan

Unlock everything

  • Printable shop charts — tap-drill, clearance and torque tables for the wall or binder
  • Saved favourites — pin the sizes you use and reach them in one tap
  • Custom chart builder — assemble your own pick-list and print it
  • Bolt-torque calculator with selectable lubrication (nut-factor K) values

Premium plans are launching soon. In the meantime, the free tier already covers the full size reference — every dimension, tap drill and clearance hole — plus the thread identifier, the tap-drill calculator, and a default-K torque estimate.

Browse the size referenceIdentify a thread

Good to know

Questions

What stays free?

Every thread size page — all dimensions, the recommended tap drill and clearance hole, a default-K torque estimate and wrench sizes — plus the thread identifier and the tap-drill calculator. That's the whole reference, no account needed.

What does Premium add?

The shop workflow depth: printable charts you can pin up or file, saved favourites and a custom chart builder for the sizes you use daily, and the bolt-torque calculator with a full lubrication (nut-factor K) selector so torque matches how the joint is actually assembled.

Are the numbers different in Premium?

No — the reference values are identical and free for everyone. Premium is about speed and format (charts, favourites) and the extra torque conditions, not about hiding data.

How is my access stored?

Purchases are handled by RevenueCat and Stripe. An anonymous purchase id is kept in this browser so ThreadRef 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 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.

Lost your access code?

Your code is shown on this page whenever you're subscribed here, and it's in your purchase receipt email. If you can't 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.