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Where can I find these bolts?
By Tom in NH, Section Homebrewed Electricity Posted on Thu Aug 17, 2006 at 02:14:44 AM MST
Anybody know?

I've been to my regular hardware store sources looking for some 7/16 diameter bolts X 3 in.long with 20 threads per inch. I want them threaded the whole length of the bolt. These are for adjusting the distance between my two rotors. I can find them with just part of their lengths threaded, but not all of it. Does anyone have any ideas of where to find something like this? --tom

Where can I find these bolts? | 8 comments (8 topical)

Re: Where can I find these bolts? (3.00 / 0) (#1)
by harrie on Wed Aug 16, 2006 at 08:21:15 PM MST

Hi Tom, kinda think that is a hard order to fill, I guess you could cut the threads the rest of the way yourself, if you had a thread die, or take them to a mechine shop and have them do it. Most here on this site, use allthread. if for some reason you want a head on the end of the bolt, I guess you could always weld a nut on one end of the allthread??

Great fun, harrie

Re: Where can I find these bolts? (3.00 / 0) (#7)
by Ungrounded Lightning Rod on Thu Aug 17, 2006 at 03:26:04 PM MST

Or do a "jam nut" by tightening two nuts against each other, perhaps with a fender washer between 'em to keep the wrench from slipping onto the other nut.

Tighten with the outer nut, loosen with an open-end wrench on the inner one.

[ Parent ]

Re: Where can I find these bolts? (3.00 / 0) (#2)
by dudevato on Wed Aug 16, 2006 at 08:43:29 PM MST

I was going to tell you to get a lenght of all thread also.

Re: Where can I find these bolts? (3.00 / 0) (#3)
by elt on Wed Aug 16, 2006 at 08:46:59 PM MST

www.mcmaster.com , item 92865A322 ... pricey!
Hope that helps,
- Ed.

Re: Where can I find these bolts? (3.00 / 0) (#4)
by RP on Wed Aug 16, 2006 at 09:17:12 PM MST

How about a carriage bolt? They're usually threaded all the way up but they've got that rounded square plug head on them.

Re: Where can I find these bolts? (3.00 / 0) (#5)
by nanotech on Thu Aug 17, 2006 at 12:30:07 AM MST

http://www.tacomascrewproducts.com/

My father worked there (when he was alive).

If they haven't got them, they aren't made. Plain and simple.
__________________________________________
My ship finally came in, but it was the Kobayashi Maru!

Re: Where can I find these bolts? (3.00 / 0) (#6)
by SparWeb on Thu Aug 17, 2006 at 12:55:54 PM MST

Another suggestion....

Bolt Supply House - Western Canada

To find a similar store in NH (I assume you're in New Hampshire), you could try stores that sell special tools and fasteners.

As a last resort, try an aircraft overhaul shop. They throw out bolts all the time, and all aircraft bolts are UNF.

Does it HAVE to be 7/16"-20 UNF?
Steven Fahey

Re: Where can I find these bolts? (3.00 / 0) (#8)
by Tom in NH on Thu Aug 17, 2006 at 06:42:30 PM MST

Thanks, all for your many ideas. I ended up taking Harie's suggestion. For the price of one McMasters bolt I purchased a 7/16-20 die at my local Napa dealer and in 15 minutes I threaded all six of the bolts I needed. Good deal. Now I can precisely adjust the air gap between my magnets. --tom

Where can I find these bolts? | 8 comments (8 topical)

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