Thanks for the post Carlo,

It looks like you'll need to return this Valve, as you need a different kit for your older N60FN nailer, and the kit is unfortunately obsolete.

Per the manufacturer rep:

"It is correct that it would require a conversion kit for the TVA6 to work, and unfortunately the kit and most of the bulk parts are gone.

The parts needed are:

SEQ6 – available
TVA6 Kit -available
N60091A – Upper Trip (The key upgrade component, different length and configuration than the original)
N60012 – Trip Guide (original would not let the new trigger drop far enough on some tools, sometimes the old ones work)

On our website it does state that a different kit is necessary for the nailers with the older metal trigger valves (reference# 108 on the parts list):
www.mastertoolrepair.com/pneumatic-finis...ts-n60fn-p-4155.html

If you want, you can try finding the Bostitch part# "PK1" online, possibly eBay; this is the original OEM part# fore the metal-style trigger valve kit.

I'm sorry I can't be of much help on this, the manufacturer has simply made the parts obsolete. I appreciate you contacting us and giving us a shot.

Cheers,

- MTR