Description of Century Drill Tool 98218 Fractional
Heat treated and tempered for file hard threads, and longer, useful life. Designed for hand cutting applications. 1-5/8" measurement across die flats. NF stands for national fine threads.
this threading die is exactly what i was looking FOR. Industrial and Scientific in nature it has helped me to create precise threads according to my experience. The dies durable construction ensures that it can handle any project I throw its way. The only con is that the size selection is limited, but that's not a big issue for me. Overall, I highly recommend this cutting tool for anyone in need of accurate and reliable threads..
Pros
Durable and well-built, able to withstand heavy use.
Cons
Pricier than other comparable drill bits in its category.
I just used a die to thread the U-Bolts. The first three went well, but then all the last incisors broke and the die became almost useless. Hundreds of times I've used a stamp, I've never done it. I ended up ordering one from someone else and later finished the job.