You can use them on stainless steel but you risk cross contamination. Your best bet would be to use stainless steel dies on stainless steel.
Yes, that is correct.
2 1/2-4" SS dies 33057
Just regular 1/2"-14 NPT pipe thread dies is all we offer.
There are different part numbers for NPT and BSPT dies.
Please call 888-743-4333 and provide your account number. If you are a distributor we can provide pricing,
Please see the link below. file:///P:/TechSrvc/Obsolete-Parts%20List/1822.pdf
you need a complete set (4) of dies for the size you want i.e. 1/4 to 3/8 to fit rigid 300 style machine. However I would check that the die head screws holding the two parts together have not come loose as this can cause bad threading.
For 1-2" SS you will need #47790.
No, unfortunately you can't. The biggest is 1 1/2" -12.