Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Articles] - [Photo Gallery] - [Groups] - [Chat] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] - [Tools]

Go Back   SmokStak > SmokStak® Shop Equipment Tools and Techniques > Machine Shop and Tool Talk
Forgot Password? Join Us!

Notices

Machine Shop and Tool Talk Shop Equipment, fabrication, repairs, how to fix it, which tool to use for the job. Machinist shop talk, straight to the point.

Machine Shop and Tool Talk

5/8-20 bolts?


this thread has 30 replies and has been viewed 6119 times

Reply
 
Thread Tools Display Modes
  #1  
Old 12-05-2010, 03:14 PM
larryloser larryloser is offline
Registered
 
Join Date: Oct 2010
Location: holland, mi
Posts: 5
Likes: 0
Liked 0 Times in 0 Posts
Default 5/8-20 bolts?

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!
Reply With Quote
Sponsored Links
  #2  
Old 12-05-2010, 05:29 PM
KyleBlankenship KyleBlankenship is offline
Registered-III
 
Join Date: Nov 2004
Location: Brookville, Ohio USA
Posts: 959
Likes: 300
Liked 497 Times in 233 Posts
Default Re: 5/8-20 bolts?

try fastenal, grainger,mcmaster-carr. id try those guys first.
Reply With Quote
  #3  
Old 12-05-2010, 08:34 PM
Todd Hodges's Avatar
Todd Hodges Todd Hodges is offline
Subscriber
 
Join Date: Jan 2008
Location: Decatur, Texas
Posts: 489
Likes: 68
Liked 350 Times in 159 Posts
Default Re: 5/8-20 bolts?

Try Mcmaster-carr they have all kind of bolts
Reply With Quote
  #4  
Old 12-11-2010, 10:10 AM
chengdave2003 chengdave2003 is offline
Registered
 
Join Date: Dec 2010
Location: Henderson, NY
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
Default Re: 5/8-20 bolts?

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
Reply With Quote
  #5  
Old 12-11-2010, 10:32 AM
heins heins is offline
Registered-III
 
Join Date: Apr 2010
Location: Kit Carson, Colorado USA
Posts: 970
Likes: 214
Liked 529 Times in 297 Posts
Default Re: 5/8-20 bolts?

Any Case or John Deere dealer or auto parts store will have or can get you grade 5 bolts for you.
Reply With Quote
  #6  
Old 12-11-2010, 12:08 PM
RSCurtis RSCurtis is offline
Subscriber
 
Join Date: Jul 2009
Location: St. Thomas, Pennsylvania
Posts: 740
Likes: 0
Liked 250 Times in 215 Posts
Default Re: 5/8-20 bolts?

I've never heard of 5/8-20 bolts. Could you mean 5/8-18?
Reply With Quote
  #7  
Old 12-11-2010, 12:57 PM
chengdave2003 chengdave2003 is offline
Registered
 
Join Date: Dec 2010
Location: Henderson, NY
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
Default Re: 5/8-20 bolts?

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).
Reply With Quote
  #8  
Old 12-11-2010, 06:49 PM
J.B. Castagnos J.B. Castagnos is offline
Registered-III
 
Join Date: Nov 2004
Location: South Louisiana USA
Posts: 1,473
Likes: 292
Liked 1,666 Times in 522 Posts
Default Re: 5/8-20 bolts?

I would buy some long 5/8 grade 8 bolts, cut to length and thread them. Best threaded in the lathe.
Reply With Quote
  #9  
Old 12-11-2010, 07:12 PM
Rick McKay Rick McKay is offline
Subscriber
 
Join Date: Mar 2007
Location: Mass City, Michigan, USA
Posts: 456
Likes: 652
Liked 367 Times in 127 Posts
Default Re: 5/8-20 bolts?

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
Reply With Quote
  #10  
Old 12-11-2010, 07:31 PM
Tony Rye Tony Rye is offline
Subscriber
 
Join Date: Aug 2008
Location: Mobile, Alabama
Posts: 308
Likes: 15
Liked 56 Times in 54 Posts
Default Re: 5/8-20 bolts?

there used i n the power pole industry they are caller dobble armming bolts .most of it is allthread but bolts are available
Reply With Quote
  #11  
Old 12-11-2010, 10:45 PM
930dreamer 930dreamer is offline
Registered-III
 
Join Date: Mar 2009
Location: Amarillo, TX USA
Posts: 168
Likes: 8
Liked 42 Times in 24 Posts
Default Re: 5/8-20 bolts?

I have (12) Alloy bolts? No marking on head 3/4" X 4 1/2" $1 each.
Attached Thumbnails
MAXRR 001.jpg   MAXRR1 002.jpg  
Reply With Quote
  #12  
Old 12-11-2010, 10:47 PM
930dreamer 930dreamer is offline
Registered-III
 
Join Date: Mar 2009
Location: Amarillo, TX USA
Posts: 168
Likes: 8
Liked 42 Times in 24 Posts
Default Re: 5/8-20 bolts?

Sorry for the bad pictures, they might be 5/8".
Reply With Quote
  #13  
Old 12-14-2010, 01:11 AM
prybar prybar is offline
Subscriber
 
Join Date: Oct 2010
Location: Ohio
Posts: 128
Likes: 64
Liked 112 Times in 46 Posts
Default Re: 5/8-20 bolts?

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.
Reply With Quote
  #14  
Old 12-18-2010, 06:34 PM
larry lee larry lee is offline
Registered
 
Join Date: Sep 2010
Location: Holland, MI
Posts: 1
Likes: 0
Liked 0 Times in 0 Posts
Default Re: 5/8-20 bolts?

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
Reply With Quote
  #15  
Old 12-18-2010, 07:02 PM
larryloser larryloser is offline
Registered
 
Join Date: Oct 2010
Location: holland, mi
Posts: 5
Likes: 0
Liked 0 Times in 0 Posts
Default Re: 5/8-20 bolts?

Quote:
Originally Posted by 930dreamer View Post
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
Reply With Quote
  #16  
Old 12-18-2010, 07:53 PM
hello113 hello113 is offline
Registered-I
 
Join Date: May 2010
Location: Sherwood, Arkansas
Posts: 41
Likes: 12
Liked 14 Times in 9 Posts
Default Re: 5/8-20 bolts?

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???
Reply With Quote
  #17  
Old 12-18-2010, 08:05 PM
Junkologist's Avatar
Junkologist Junkologist is offline
Subscriber
 
Join Date: Nov 2004
Location: Avon, Ohio, USA
Posts: 3,445
Likes: 2,433
Liked 2,722 Times in 1,221 Posts
Images: 114
Default Re: 5/8-20 bolts?

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.
__________________
Mike

Check out my engine videos at http://www.youtube.com/profile?user=Cletrac

Last edited by Junkologist; 12-18-2010 at 08:26 PM.
Reply With Quote
  #18  
Old 12-18-2010, 08:38 PM
Jeff in PA's Avatar
Jeff in PA Jeff in PA is offline
Subscriber
 
Join Date: Jun 2009
Location: Zionsville, Pennsylvania
Posts: 479
Likes: 380
Liked 765 Times in 220 Posts
Default Re: 5/8-20 bolts?

Quote:
Originally Posted by Junkologist View Post
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 )
Reply With Quote
  #19  
Old 12-19-2010, 12:04 PM
930dreamer 930dreamer is offline
Registered-III
 
Join Date: Mar 2009
Location: Amarillo, TX USA
Posts: 168
Likes: 8
Liked 42 Times in 24 Posts
Default Re: 5/8-20 bolts?

Quote:
Originally Posted by larryloser View Post
Hello, If they are 5/8-20, I will buy a couple of them.
Thanks!
Larry
I'll check today.
Reply With Quote
  #20  
Old 12-19-2010, 05:01 PM
930dreamer 930dreamer is offline
Registered-III
 
Join Date: Mar 2009
Location: Amarillo, TX USA
Posts: 168
Likes: 8
Liked 42 Times in 24 Posts
Default Re: 5/8-20 bolts?

They're 3/4" sorry.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Iron Bolts Derek Pollard Antique Gas Engine Discussion 3 02-23-2008 12:54 PM
22-36 I.H.C. Head Bolts Bill Thurman Antique Tractors - Old Iron Lugs, Cleats and Tracks 3 01-07-2007 09:28 PM
Why Studs Instead Of Bolts ?? Smoke Antique Gas Engine Discussion 10 02-10-2005 10:55 PM
Need JD-E bolts Al Hettich Antique Engine Archives 0 06-10-2003 10:40 PM
BOLTS mark Antique Engine Archives 3 01-11-2001 02:12 PM


All times are GMT -4. The time now is 08:02 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark
A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2014 by Harry Matthews
P.O. Box 5612 - Sarasota, FL 34277