3/8 BSF threading

[Loop Erimder]

Matty boy I posted somewhere on here before ....
These..
.
I made a tri pod rest .. The brass nuts are 3/8 bsf ....put on a drill clamped onto the work bench and then filed at speed.....a doddle really......

Here they are on ebay

[Wagtail]

Brass threaded 3/8 bsf bar here http://www.ebay.co.uk/itm/3-16-1-4-5-16 ... o3GJa3Lmyg

[Kingfisher]

Thanks Guys, you've been a great help.

[Gawanabana]

Thanks for bringing this one up kingfisher. I am having the same problem at the moment. In the end got fed up and confused I gave up and made a catapult instead...

After reading all the advice I think i will go back to it.

[Nobby]

You know cutting your own threads with a tap and die really isn't that hard; the object needs to be of the right dimensions first, of course, but after that it's just a matter of a dab of grease and hand-turning the tap or die, with a stop and return to cut the swarf, ..the wastage...off before resuming.

If your cutting an internal thread into a blind hole, the taps used are progressive, so that you do it three times, taking just a bit of metal off each time.

It was taught to 11 year olds in 'O'Level Metalwork, for many, their first time in a workshop.

This is American and speaks of different thread pitches to what we use, but it's well done:

https://www.youtube.com/watch?v=KVnN4jiB7Gk

He says 'chips' where I would say swarf.

Since we are talking about brass here I seem to recall extra recommendations about cutting a thread in this metal...was it to use grease and not oil, anyone....? Brass is a rather 'crumbly' metal.

[QuinetteCane]

I took metalwork in secondary school for a term, the master left suddenly under
unexplained circumstances and never replaced,it was widely held he was messing
with the wimmin staff. Never got a refund for our prepaid stock and the fully
fitted classroom stood unused for the rest of my schooldays.
That's when I found out 'authority' was fallible.
I do dislike working with brass tho', those crumbs can fly about from a lathe and
also penetrate the skin. Schooldays..Pah!

[Woodytia]

I think stud connectors of a suitable size would do the job after modification with a tap. Loads available on the internet possibly even in imperial sizes.

[JAA]

It's well worth buying a 3/8 BSF die and tap, if nothing else they're good for cleaning and re-cutting old threads.