On Sunday, March 31, 2002 at 9:56:12 AM UTC-8, Jim Schwitters wrote:
I finally got the damaged collet key removed from my B'port C head spindle
but found it's threaded 1/4 x 32. Anyone know of a source for a setscrew at
least 3/8"long in that thread or a bolt or threaded rod from which I can
make a replacement.

I can always turn one on the lathe but I'd like a good fit and that will be
difficult without good thread measuring tools. I'd also rather not rethread
the hole, either.
Thanks,
Jim S.

here ya go https://www.mscdirect.com/browse/tnp...kaAnJ0EALw_wcB

wrote:

On Sunday, March 31, 2002 at 9:56:12 AM UTC-8, Jim Schwitters wrote:
I finally got the damaged collet key removed from my B'port C head
spindle
but found it's threaded 1/4 x 32. Anyone know of a source for a setscrew
at least 3/8"long in that thread or a bolt or threaded rod from which I
can make a replacement.

I can always turn one on the lathe but I'd like a good fit and that will
be
difficult without good thread measuring tools. I'd also rather not
rethread the hole, either.
Thanks,
Jim S.

here ya go
https://www.mscdirect.com/browse/tnp...id=ppc-google-
New+-+Machinery+-+PLA_s7VEgyYkn___164110813593_c_S&mkwid=s7VEgyYkn% 7cdc&pcrid=164110813593&rd=k&product_id=53319448&g clid=Cj0KCQjw6uT4BRD5ARIsADwJQ1_1fzE2zQ920pr32s1Ob WXYVzbhflmLMir213MjOkFEvuTMj8J0-
BkaAnJ0EALw_wcB

Wow, I don't think that is right. !/4" standard threads are 20 and 28.

I'm thinking this may be a 6 mm x 0.8 metric screw.

Jon

On Friday, July 24, 2020 at 10:35:21 AM UTC-7, Jon Elson wrote:
wrote:

On Sunday, March 31, 2002 at 9:56:12 AM UTC-8, Jim Schwitters wrote:
I finally got the damaged collet key removed from my B'port C head
spindle
but found it's threaded 1/4 x 32. Anyone know of a source for a setscrew
at least 3/8"long in that thread or a bolt or threaded rod from which I
can make a replacement.

I can always turn one on the lathe but I'd like a good fit and that will
be
difficult without good thread measuring tools. I'd also rather not
rethread the hole, either.
Thanks,
Jim S.

here ya go
https://www.mscdirect.com/browse/tnp...id=ppc-google-
New+-+Machinery+-+PLA_s7VEgyYkn___164110813593_c_S&mkwid=s7VEgyYkn% 7cdc&pcrid=164110813593&rd=k&product_id=53319448&g clid=Cj0KCQjw6uT4BRD5ARIsADwJQ1_1fzE2zQ920pr32s1Ob WXYVzbhflmLMir213MjOkFEvuTMj8J0-
BkaAnJ0EALw_wcB

Wow, I don't think that is right. !/4" standard threads are 20 and 28.

I'm thinking this may be a 6 mm x 0.8 metric screw.

Jon

I just bought one from Bridgeport and it is indeed 1/4-32

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.youtube.com/watch?v=tj1XwSC9EZ4

"Jon Elson" wrote in message
...

wrote:

On Sunday, March 31, 2002 at 9:56:12 AM UTC-8, Jim Schwitters wrote:
I finally got the damaged collet key removed from my B'port C head
spindle
but found it's threaded 1/4 x 32. Anyone know of a source for a setscrew
at least 3/8"long in that thread or a bolt or threaded rod from which I
can make a replacement.

I can always turn one on the lathe but I'd like a good fit and that will
be
difficult without good thread measuring tools. I'd also rather not
rethread the hole, either.
Thanks,
Jim S.

here ya go
https://www.mscdirect.com/browse/tnp...id=ppc-google-
New+-+Machinery+-+PLA_s7VEgyYkn___164110813593_c_S&mkwid=s7VEgyYkn% 7cdc&pcrid=164110813593&rd=k&product_id=53319448&g clid=Cj0KCQjw6uT4BRD5ARIsADwJQ1_1fzE2zQ920pr32s1Ob WXYVzbhflmLMir213MjOkFEvuTMj8J0-
BkaAnJ0EALw_wcB

Wow, I don't think that is right. !/4" standard threads are 20 and 28.

I'm thinking this may be a 6 mm x 0.8 metric screw.

Jon
=============================

1/4-32 UNEF is found on Alco miniature toggle switches and model engine glow
plugs.
https://www.efunda.com/designstandar.../screwunef.cfm

On 7/24/2020 10:35 AM, Jon Elson wrote:
wrote:

On Sunday, March 31, 2002 at 9:56:12 AM UTC-8, Jim Schwitters wrote:
I finally got the damaged collet key removed from my B'port C head
spindle
but found it's threaded 1/4 x 32. Anyone know of a source for a setscrew
at least 3/8"long in that thread or a bolt or threaded rod from which I
can make a replacement.

I can always turn one on the lathe but I'd like a good fit and that will
be
difficult without good thread measuring tools. I'd also rather not
rethread the hole, either.
Thanks,
Jim S.

here ya go
https://www.mscdirect.com/browse/tnp...id=ppc-google-
New+-+Machinery+-+PLA_s7VEgyYkn___164110813593_c_S&mkwid=s7VEgyYkn% 7cdc&pcrid=164110813593&rd=k&product_id=53319448&g clid=Cj0KCQjw6uT4BRD5ARIsADwJQ1_1fzE2zQ920pr32s1Ob WXYVzbhflmLMir213MjOkFEvuTMj8J0-
BkaAnJ0EALw_wcB

Wow, I don't think that is right. !/4" standard threads are 20 and 28.

I'm thinking this may be a 6 mm x 0.8 metric screw.

Jon



I just checked. 1/4-32 is a standard for UNEF.

UNF is indeed 28 and UNC is 20 though.

I often forget to check for UNEF threads until confronted by one.

Jim Wilkins wrote:



1/4-32 UNEF is found on Alco miniature toggle switches and model engine
glow plugs.
https://www.efunda.com/designstandar.../screwunef.cfm

Yes, I've seen it on miniature switches, but never in a bolt or setscrew
before. Learn something new every day!

Jon

"Bob La Londe" wrote in message ...

I just checked. 1/4-32 is a standard for UNEF.

UNF is indeed 28 and UNC is 20 though.

I often forget to check for UNEF threads until confronted by one.
=============================================

Here are some other odd threads you may encounter:

https://www.buyfittingsonline.com/pa...ifference.html
NPS shows up in shower spray hoses that seal with a rubber washer, and
hydraulic "swivel" fittings.
https://www.discounthydraulichose.co...vels-npsm.html

https://paxtonhardware.com/blogs/news/lamp-thread-sizes
It's another untapered version of a pipe thread.