WTF is machine thread

[The Buddha]

OK I guess I am up to my elbows in it ... What is machine thread...
Yea I use it, stainless button head bolts are available in it ... with allen heads no less so I love it ... but what exactly is it.
BTW 10-32 1/2 inch long ones ... yea will fit the float bowl screws... which is what those that send me carbs get back after a rejet ...
Cool.
Srinath.

[Dom]

IMHO no such thing.  Never heard of it.  A bolt is a bolt is a bolt.

[GeeP]

Probably just somebody's way of referring to the unified national thread.  (the standard 60-degree form).

At first I thought you were referring to some kind of Brit. word for  "All Thread" until I saw 10-32x1/2".  :lol:

[Kerry]

I interpret "machine threads" to be a generic term for the tighter, finer threading used on machine screws (as opposed to wood screws, sheet metal screws, etc.)

[Mk1inCali]

Ditto on Kerry's comment, but it also might be the title of an older Bush song, or a band name.  Wait, that was Machine Head...whoops...

[Blueknyt]

yeah, i belive they are refering to 'Fine' threads verses 'Coarse' threads.

[Dom]

A 10-32 x 1/2" is always 10-32 x 1/2".  You can specify the head type or the metal, even the grade of metal, but saying 10-32 x 1/2" machine thread is IMO redundant.

The "coarse" vs. "fine" is determined by the second number after the screw size; 10 = #10 screw, 32 = 32 threads per inch.  

"Coarse" and "Fine" are just more redundancies.

[The Buddha]

Ditto on Kerry's comment, but it also might be the title of an older Bush song, or a band name.  Wait, that was Machine Head...whoops...

Deep purple - and machine head... yea ...
Cool.
Srinath.

[Reknelb]

the fine size in #10 would be 10-32
the coarse size would be 10-24

1/4-28 would be fine
1/4-20 coarse

and so on and so forth

Think of a machine screw as one that will accept a nut, as opposed to a wood screw, sheet metal screw, lag bolt, etc. (as Kerry has pointed out above) They come in various sizes and head configs.

[John Bates]

And then there's pipe thread!!! :lol:

[tkm433]

BTW 10-32 1/2 inch long ones ... yea will fit the float bowl screws... which is what those that send me carbs get back after a rejet ...
Cool.
Srinath.

Maybe I could be wrong but for some strange reason I feel that a motorcycle made in Japan and carbs that are also made in Japan us metric size nuts and bolts and you are using 10-32 1/2 inch in place of a metric or correct size item??

Again I could be wrong but ever nut and bolt that I have run across on a Suzuki, Yamaha, Honda and every other "made in Japan" motorcycle or bike has been metric.

[Kerry]

Good point!

From the What does one need to Rejet a 2001+ GS500. thread in the FAQ forum:

It is highly suggested that you also replace the 4 mounting bolts of each float bolt with allen screws rather than the philips heads that are on there. To take the philips heads off you will need an Impact Wrench (best to keep carb on a hard stable surface when doing this).

The size for the Allen Bolts are: M4x10 by 1/2" long METRIC

This will allow faster changing of jets on the bike.

Manjul and I found those bolts/screws at some home improvement place called ... Orchard Supply? ... in the Reseda / Van Nuys area of LA.  They had a GREAT selection of metric stuff.

[se7enty7]

Good point!

From the What does one need to Rejet a 2001+ GS500. thread in the FAQ forum:

It is highly suggested that you also replace the 4 mounting bolts of each float bolt with allen screws rather than the philips heads that are on there. To take the philips heads off you will need an Impact Wrench (best to keep carb on a hard stable surface when doing this).

The size for the Allen Bolts are: M4x10 by 1/2" long METRIC

This will allow faster changing of jets on the bike.

Manjul and I found those bolts/screws at some home improvement place called ... Orchard Supply? ... in the Reseda / Van Nuys area of LA.  They had a GREAT selection of metric stuff.

I got mine at ace hardware

any black bolt i've ever seen has been metric.. these were metric.. and black..

[Dom]

You can get black bolts in SAE too.  Just because a bolt is black doesn't mean it's metric.  Usually when I buy pan head and button head allen screws they only come in black, SAE and metric.  But most black bolts will rust like crazy, so it's always a good idea when buying bolts for your gs to buy them in stainless, every bolt except the header bolts; usually they are made of an alloy that is designed to withstand heat extremes...

[The Buddha]

BTW 10-32 1/2 inch long ones ... yea will fit the float bowl screws... which is what those that send me carbs get back after a rejet ...
Cool.
Srinath.

Maybe I could be wrong but for some strange reason I feel that a motorcycle made in Japan and carbs that are also made in Japan us metric size nuts and bolts and you are using 10-32 1/2 inch in place of a metric or correct size item??

Again I could be wrong but ever nut and bolt that I have run across on a Suzuki, Yamaha, Honda and every other "made in Japan" motorcycle or bike has been metric.

5 mm dia .8mm pitch is the correct bolt for the 89-00 floats ... the 01+ floats are 4 bolt ... so dont get confused. Now 32 threads per inch = .7934375 mm ... I'd say there is atleast that much play ... and a 10 screw is 5mm dia ... The 10-32 is exactly the same as 5mm .80 pitch, they even fit the test threaded part, they fit each other ... the thread to thread match up and look for light ... perfect fit, and guess what, never had any issues in any carb. BTW honda carbs use 4mm and I believe I fit 8-32's in it ... have to check... Button head stainless bolts aren't available in metric ... Heck stainless allen head even cylindrical isn't available at Home depot ... I know I can buy custom bolts from a bolt speciality shop, but I dont anticipate needing 250 bolts - their minimum order for small sizes, in the near future... BTW you should try it and see how it fits... and post back here.
Cool.
Srinath.

[tkm433]

5 mm dia .8mm pitch is the correct bolt for the 89-00 floats ... the 01+ floats are 4 bolt ... so dont get confused. Now 32 threads per inch = .7934375 mm ... I'd say there is atleast that much play ... and a 10 screw is 5mm dia ... The 10-32 is exactly the same as 5mm .80 pitch, they even fit the test threaded part, they fit each other ... the thread to thread match up and look for light ... perfect fit, and guess what, never had any issues in any carb. BTW honda carbs use 4mm and I believe I fit 8-32's in it ... have to check... Button head stainless bolts aren't available in metric ... Heck stainless allen head even cylindrical isn't available at Home depot ... I know I can buy custom bolts from a bolt speciality shop, but I dont anticipate needing 250 bolts - their minimum order for small sizes, in the near future... BTW you should try it and see how it fits... and post back here.
Cool.
Srinath.

I did some simple math above in red in the image I posted just to see if the bolt size you use and the metric are the same as you state they are.

It is still a simple numbers game but yes the pitch is almost corect but for some funny reason, maybe Sesame Street as a kid, 4.826mm does not equal 5.0mm. That is something like 3.5% off!  

If it calls for metric then use metric. There are no short cuts when dealing with other people's stuff as is the case  here.  If you want to use duct tape and super glue on your own bike go for it but if you are going to get paid by others to do a quality job then do a quality job.

[The Buddha]

I send the original bolts back always ... the SS bolts fit perfectly ... not look like they will strip out ... and always the stock is enclosed. Now I could buy steel 5mm .8 ones and save myself a nice couple bucks ...
Cool.
Srinath.

[Dom]

Button head stainless bolts aren't available in metric ...

Cap head are available in SS and work just fine on the diaphragm and float bowls:

Plus, cap head use a bigger allen size than button head which just feels easier for me.

Let me know if you want me to send you some. I can git 'em pretty cheap 'round these parts.

[Pam G]

And then there's pipe thread!!! :lol:

And don't forget about British Standard Pipe Thread (BSPT)

My TT600's got some o' dem!

[John Bates]

And don't forget about British Standard Pipe Thread (BSPT)

My TT600's got some o' dem!

Soooooo..... Triumphs are put together with pipe threads? :lol:  :lol:  :lol:  :dunno: