Description
About this item:
- Unified National Fine (UNF).
- Split circular chrome alloy button dies are most commonly used in conjunction with a die stock handle.
- They can be used as thread chasers to clean an existing thread.
- They can also be used to create a new male thread on non-ferrous metals and plastics.
- Chrome alloy dies are not suitable for creating precision, safety or critical threads.
- The UNF thread form was introduced in 1948 as an attempt to standardise thread forms in the USA, Canada and the UK.
- The thread profile of UNF is the same as for metric threads and is described in the JIS B0206 standard.
- The thread is described by its major diameter and the number of threads per inch of length (TPI).
- When used on external threads this series has greater tensile stress area than coarse threads of the same size.
- Fine series threads will resist stripping out better than coarse threads in areas where the external and mating internal threads are subjected to loads equal to or greater than the capacity of the screw or bolt.
- Fine threads are also used where the length of engagement is limited 1-1/4 or where wall thickness demands a fine pitch.
Options
- 4814-1/2-2D
- 4814-7/8-2D
Options
- 4814-1/2-2D
- 4814-7/8-2D
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Product good, delivery good
Firstly the delivery was fast and the transaction simple. Thanks. The Bosch is well built, has the power to tackle some thick growth and you can get a second battery 8amp by redemption free. Happy I selected the bundle and the dealership.
Great company, great support, great product.
As with all of the rosewood marbles tools, great quality. Now I just need to stop the students from damaging them.
No problem with the whole transaction
Good price easy transaction and good delivery
Bought as a present. Easy transaction, good delivery.
So far 5 stars. Easy to assemble and the mobility kit is great must have! Easy to adjust and use but time will tell.
Thank you for a quick & easy transaction
Wonderful fast shipping and delivery. Awesome business.
Took was exactly what I needed to complete my project. Great quality. Left a beautiful smooth hole.
Exactly what’s required to convert my lathe headstock to fit an old but reliable chuck.
Very good 👍
Item in excellent condition, good price, speedy delivery.
Arrived well packaged and works great, good doing business with yourselves
