Thread ID Mate

Identify any hydraulic thread in four measurements — Metric, UN/UNF, NPT, NPSM, BSPP, BSPT and JIS, with the look-alike sizes flagged.

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Order your own-brand Thread ID Kit
Caliper + pitch gauge + angle gauge, laser-engraved with your logo. Your customers measure the thread, then identify it in this app — with your brand on both.
Get a quote → See the kit specs

Install on your phone

iPhone / iPad — Safari → Share → Add to Home Screen

Android — Chrome → menu → Install app

Works offline once installed.

1Pitch / TPI (thread gauge)

2Diameter (caliper)

3Taper

4Seat / fitting type (optional)

One pocket set covers all four measurements

The Thread ID Kit puts the caliper, thread gauge, angle gauge and steel ruler in one case — exactly the four numbers this app asks for, nothing else to hunt for in the workshop. Add your own logo and hand it to your customers: they measure the fitting on site, open the app, and get your brand on both the tool and the screen.

Order your own-brand kit → See the kit specs

Search by designation

What you need — 3 gauges, 1 ruler & 1 caliper and 4 numbers

Flank angle & Pitch / TPI Thread gauge — one gauge covers DIN Metric / BSP, the other covers JIC / UNO / ORFS / NPT. Each leaf reads the thread form (flank angle: 60° Metric / UN / NPT, 55° BSP / JIS) and the pitch / TPI — fan the leaves across the thread until the teeth drop in cleanly, then read the value off the blade.
Seat / cone angle Angle gauge — seat the gauge on the fitting's flare / cone and read the angle that drops in with no gap: 45° (SAE flare), 37° (JIC flare), plus 30° and 12° for other seat forms.
Diameter & length Caliper & ruler — caliper across the crests for the major diameter (or across the bore for an internal thread); ruler / steel rule for overall length and to confirm whether the thread runs parallel or tapers.

How to measure (4 steps)

    Seat angle → fitting family

    The classic traps