Thread: Ratchet rivnut / nutsert tools - are the mandrels and anvils interchangeable?

Some years back I purchased a Time-Proof TSM-122 manual ratcheting rivnut setting tool
https://www.aliexpress.com/item/32947580110.html
Original supplier website seems to be 【工业级】TSM122手动双把棘轮铆螺母枪_信吾铆接紧固系统(上海)有限公司 (use Google Translate for English)

It came with M5, M6, M8, M10 and M12 mandrels in the kit - and these seem to be available as spare parts too
https://www.aliexpress.com/item/32958374776.html

When using it recently, I found myself wishing I had an M4 mandrel for it - but couldn't find anything available. I know there are other ways to instal rivnuts, but given this is such a beautiful tool, I wanted to be able to use it for all needed sizes.

There appears to be an equivalent, if not identical tool on the market, but using the model number RFS-A12 / Apex Fasteners A12-A.
RFS-A12 Heavy-duty Rivnut Ratchet Tool with setting capacity up to M12 | Rivnut Fastening Systems
RFS-A12- Professional Heavy Duty Rivnut Rivstud Nutsert Ratchet Tool – Twin Eagle Imports
https://sydneyboltsandfasteners.com....ivet-nut-tool/
A key difference being that its supplied with supplied with M5, M6, M8 Rivstud Mandrels as part of the kit, and is presented in an alloy case.
There are also a broader range of spare parts available, including Mandrels and Anvils down to M4 size, as well as in 1/4, 3/8 and 5/16 UNC.

I decided to take my chances and order up am M4 Mandrel and Anvil for the RFS-A12 hoping that it will also fit the Time-proof TSM-122 and indeed it does. Just thought I'd post just in case it helps someone else. My many hours of searching uncovered nothing about whether these tools are the same or not but I can confirm the mandrels/anvils definitely are interchangeable.

Here's a link to where you can buy the M4 Mandrel/Anvil
RFS-A12 Spares | Rivnut Fastening Systems

The other sizes can be had cheaper from China if anyone needs replacements
https://www.aliexpress.com/i/32958374776.html