5/8-20 bolts?

[larryloser]

Hello,

I am restoring a '59 Mead Speedcat mini crawler loader and I
need to replace a couple of 5/8-20 class 5 hex bolts and i cannot find any sources. Does anyone know where I can get these?

Thanks!

[KyleBlankenship]

try fastenal, grainger,mcmaster-carr. id try those guys first.

[Todd Hodges]

Try Mcmaster-carr they have all kind of bolts

[chengdave2003]

I looked at all my sources and couldn't find them either. Something that you may consider is buying regular grade 5 coarse threaded bolts (coarse because they're cheaper) with a long unthreaded portion and have a machinist cut the threads for you.

Depending on the length of the bolt you need I could cut the threads for you on my lathe. My Harley has the 5/8-20 threaded axle and nut (to test for fit).

If you want to consider this, send me an e-mail to daveyoung@frontiernet.net with the details of what you need.

Dave

[heins]

Any Case or John Deere dealer or auto parts store will have or can get you grade 5 bolts for you.

[RSCurtis]

I've never heard of 5/8-20 bolts. Could you mean 5/8-18?

[chengdave2003]

It's a true thread, special, but a true thread. You can actually buy a tap and die with that thread:

http://www1.mscdirect.com/eCommerce/...atchallpartial

http://www1.mscdirect.com/eCommerce/...%C2%A25%2F8-20

I can't find any bolts with that thread, but some Harley's have a rear axle and nut that use it (I'm pretty sure mine does).

[J.B. Castagnos]

I would buy some long 5/8 grade 8 bolts, cut to length and thread them. Best threaded in the lathe.

[Rick McKay]

A threading machine, such as a Ridgid 535 would be even easier that a lathe. If someone you know has a set of 1/2-20 dies to fit the ridgid universal die head, you just adjust the die head for the 5/8 dia, and cut the new threads on the unthreaded portion of a longer bolt that was cut off, like previously mentioned. If you you had a test nut handy, the whole job could be done in about 10 minutes, and that's including the time it takes to install the dies into the head.

Gotta love those Ridgid 535's!!!

Rick

[Tony Rye]

there used i n the power pole industry they are caller dobble armming bolts .most of it is allthread but bolts are available

[930dreamer]

I have (12) Alloy bolts? No marking on head 3/4" X 4 1/2" $1 each.

[930dreamer]

Sorry for the bad pictures, they might be 5/8".

[prybar]

I can single point thread them. But not cheap. Alot of work goes into making oddball bolts. They would have a center drill in the end for a live center. I would have to get the hex stock, or to be cheaper turn down a 3/4 bolt to 5/8 then thread. only if hex head size is not important. $40.00 per hour.

[larry lee]

THank you all for your input and offers!
It looks like the best solution might be to
cut off a longer bolt and buy the die referenced
in one of your posts.
Thanks for the help!
Larry

[larryloser]

Originally Posted by 930dreamer

Sorry for the bad pictures, they might be 5/8".

Hello, If they are 5/8-20, I will buy a couple of them.
Thanks!
Larry

[hello113]

well not the purest way to do it but how about a std nf helicoil in the holes and use std of the shelf bolts???

[Junkologist]

Just so you know, some modern bolts with knurled threads do not have the unthreaded shank at the proper diameter for thread cutting with a die. The shank will be undersized to account for the knurling process. I have run into this problem before trying to add more threads to a bolt.

[Jeff in PA]

Originally Posted by Junkologist

Just so you know, some modern bolts with knurled threads do not have the unthreaded shank at the proper diameter for thread cutting with a die. The shank will be undersized to account for the knurling process. I have run into this problem before trying to add more threads to a bolt.

That type of process is Thread Forming.

For example, a 3/8-16 bolt would use a diameter of of 11/32 ( .344 ). When the dies roll the threads to the correct size, then they would approach .375 in diameter.

~~~~~~~~~~~~~~~~~~~

Here's another possible source for bolts
www.thomasnet.com

Type in 5/8-20 bolts into the search feature and hit enter. You can also pick a state to narrow your search.

It's a search engine we use at work to find supplies and other speciality shops ( like deep hole drilling, surface grinding of stainless steel , etc )

[930dreamer]

Originally Posted by larryloser

Hello, If they are 5/8-20, I will buy a couple of them.
Thanks!
Larry

I'll check today.

[930dreamer]

They're 3/4" sorry.