Description
Hospital labs and research centers in Vietnam run chemistry analyzers, blood counters and pipetting robots all day. Field engineers keep that gear running, and much of their work involves tiny screws in probe arms and sensor mounts. The Snap-on TQS025FUAC torque driver gives them a measured value at very low torque. It reads in inch-ounces, and its second needle holds the peak after each turn.

Analyzer service and the Snap-on TQS025FUAC torque driver
An analyzer packs precise moving parts into a small frame. For example, a probe arm, a barcode reader or an optical bracket may sit on screws that go into plastic or thin aluminum. Too much torque cracks a boss, while too little lets a part drift out of alignment. So the engineer drives each screw to the service value, then reads the held needle. That number can go straight into the service report for the lab.
TQS025FUA figures in CAT1500i
| Item | TQS025FUA (CAT1500i p.336) |
|---|---|
| Model type | Standard follow-up, 2 needles |
| Length | 7-3/4 in |
| Range | 48 in-oz / 3 in-lb |
| Increments | 1 in-oz / 1/16 in-lb |
| Stubby twin | TQSS025FUA, 5-1/4 in |
| Case | PB47 storage case |
Snap-on prints this row in its US Reading 1/4 inch drive torque driver table. That table says its drivers carry no certificate unless a C ends the stock number. So the TQS025FUAC is the C form of the TQS025FUA, and Lost in HCM’s title adds with Chart.
Inch-ounces on a small dial
Each mark on this dial equals 1 in-oz, which is a very light twist. Lost in HCM files the driver under US Reading Standard/2% Accuracy. In Snap-on terms, that grade holds within 2% of reading from 20% of full scale upward. Therefore the trusted band on the TQS025FUAC starts near 9.6 in-oz and runs to 48 in-oz. For heavier screws, the TQS050FUA reaches 96 in-oz.
Full length or stubby for lab work?
The 7-3/4 inch body gives a steady two-finger grip on an open bench. By contrast, the TQSS025FUA stubby fits inside a crowded analyzer deck. Most field kits do well with the full-length TQS025FUAC, while engineers who work deep inside modules may prefer the stubby.
Bench habits for field engineers
- Reset the follow-up needle before each screw.
- Turn slowly as you near the target, since jerks add overshoot.
- Follow the lab’s own rules for cleaning tools near samples.
- Return the driver to its PB47 case after each visit.
Request the Snap-on TQS025FUAC torque driver
Lost in HCM supplies this driver and handles the quote. For a lab service team or a distributor workshop, request a quote from Lost in HCM. You can also compare torque screwdrivers on SMK Vietnam, visit snapon.com, or contact SMK Vietnam.
Lab service FAQ
What does with Chart mean on the TQS025FUAC?
The Lost in HCM title says with Chart but does not describe it. Per the catalog, the trailing C orders the certificate version, so confirm the papers with Lost in HCM.
Can the TQS025FUAC read newton meters?
No. Its dial reads in-oz, with an in-lb equivalent. Multiply in-lb by about 0.113 for N·m, so 3 in-lb is about 0.34 N·m.
Is a shorter version available?
Yes. The catalog row also lists the stubby TQSS025FUA, with the same scale in a 5-1/4 inch body.
















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