Looking for an odd size bolt

[queen of spades]

Anyone know where I can get this bolt:

7/16" hardened hex bolt (grade 8)
1 1/4" length

Important: I need 1/2" of the bolt shouldered. That's the hard part.. most shorter length hex bolts have threads all the way to the head. Have to have the 1/2 shoulder for the application.

(fwiw I've already been to ACE, box stores and a local Fastenal outlet)

 

[RoyJackson]

That is kind of an odd bolt. If I'm reading your post correctly, you need a bolt threaded to within 1/2" of the head and that 1/2 inch should be the shoulder...not a typical shoulder bolt.
You can try companies that specialize in fasteners (rather then a hardware store). Do an internet search for "Fasteners" and "Bolts" to find a company close to you. One that comes to mind is a company named Fastenal, but I have no idea if they have an outlet near you.
The other possibility is this is a bolt made specially for a particular application. If that's the case, you'll need to contact the manufacturer of the tool or equipment you need it for (example: if you're working on a 1970 John Deere tractor, you'd need to contact a Deere dealer to buy the replacement bolt).

 

[atgreene]

Can you cut back a longer bolt that has a shoulder?

I doubt anyone made a bolt special for that application. I'm sure the right supplier will have it for you. Ford/Dearborn was famous for using 7/16" bolts. Try a New Holand dealer.

 

[jlrsn]

Why do you need 1/2" shouldered? Are you using them for a Tension or Shear type of clamp up. Most ready made Grade 8 short bolts are fully threaded unless you order them special order or from a machine shop and it will really cost you.
Jim

 

[6sunset6]

Mcmaster Carr 91257A675
Closest I found 1 3/4 long have to buy 10 shoulder length is maybe
anyway take a look .

 

[queen of spades]

Can you cut back a longer bolt that has a shoulder

Not with 60 hardened fasteners.

I'll try this once..

The Italian tiller I bought (used, and with no model# anywhere) needed replacement tines. The closest I found was Caroli replacement tines. They have the same shape and hole alignment, but the holes are once size too small.

I tried drilling the holes larger with a carbide tipped bit and my 2hp drill press - barely scratched the surface.

So my only option is to put in 7/16" bolts. If I absolutely had to I could use non-shouldered bolts but that's not what came on it. I need to get as much metal-to-metal contact as these bolts will see a LOT of abuse.

 

[queen of spades]

Mcmaster Carr 91257A675
Closest I found 1 3/4 long have to buy 10 shoulder length is maybe
anyway take a look .

Good site... those will be a bit long.

 

[atgreene]

I've never had a problem shortening grade 60 bolts. Done it a number of times. I doubt that in that application it will make a difference but perhaps. Good luck

 

[Sandlot]

I've never had a problem shortening grade 60 bolts. Done it a number of times. I doubt that in that application it will make a difference but perhaps. Good luck

Yea, a good cutoff blade in a small grinder will make short work of a grade 8 bolt.

 

[mas1237]

If the tiller is Italian, it's probably metric. Why don't you replace with the proper metric size? M12 is slightly larger than 7/16". McMaster-Carr sells the metric grade 10.9 in both fully threaded and partially threaded lengths.

1-1/4" ~ 31 mm McMaster # 98093A751 is 30 mm fully threaded
and 1-3/4" ~ 45 mm McMaster # 98093A766 is partially threaded

Cut-off the excess with a cut-off saw blade.

 

[Hooked_on_HP]

Yea, a good cutoff blade in a small grinder will make short work of a grade 8 bolt.

I think they will have to cut off 60 bolts.
Bill

 

[queen of spades]

If the tiller is Italian, it's probably metric. Why don't you replace with the proper metric size? M12 is slightly larger than 7/16". McMaster-Carr sells the metric grade 10.9 in both fully threaded and partially threaded lengths.

Therein lies the problem. The holes in the tines are 1mm too small. The bolts for the existing tines are in fact 12mm. I would need 11mm shouldered bolts, but didn't find any such bolt (of any length) locally.

ACE had a 7/16 shouldered bolt that fit snug in the replacement tines. Using the 11mm (or 7/16) bolts means I'll have a little slop in the mounting holes, but I don't know what else to do about it.

And yes I have 60 bolts to put in.. so I'd like to avoid any cutting.

 

[mas1237]

I got the picture now. The replacement tine's hole diameter isn't quite the same size as the old ones being removed.

 

[Huey]

Queen, Check BoltDepot.com. They have a shouldered bolt section if I recall right. I have ordered several times from them and they are fast and probably the lowest priced you will find.
Huey

 

[Sandlot]

I think they will have to cut off 60 bolts.
Bill

Piece of cake. Many times I have had to cut grade 8 all thread to make studs for valve installation, nutt'in to it!

 

[Eagleview]

Get some thin wall steel tubing and cut off 60 bushes that will step the tyne holes down to the bolt size you are using . A power hacksaw , bandsaw or a drop saw can do this if you use a positive stop so all are the same length .

 

[PILOON]

Go to an aviation supply house.

AN, and MS bolts are generally only threaded 1 1/2 the diameter, just enough for a nut to grip plus 2-3 threads.

Would read, AN7-(eg;32=1", -64=2")

The AN series is equivilant to grade 8 and MS closer to G12.

 

[Ford850]

Get some thin wall steel tubing and cut off 60 bushes that will step the tyne holes down to the bolt size you are using . A power hacksaw , bandsaw or a drop saw can do this if you use a positive stop so all are the same length .

Iron Horse beat me to it. Just cut some bushings out of tubing to take up the space of the larger holes.

 

[Wayne_H]

Queen, Check BoltDepot.com. They have a shouldered bolt section if I recall right. I have ordered several times from them and they are fast and probably the lowest priced you will find.
Huey

Do like he says and get what you want from these guys. Fast service, good prices. They will have what you need, I've bought a lot from them. Way cheaper than Fastenal. But if you need to get them from a local store, go to Fasternal.

Bolt Depot - Nuts and Bolts, Screws and Fasteners online

Wayne

 

[Mace Canute]

Another way of doing it, (not my first choice mind you, I like the bushing trick myself ), but you could do it with a a 'tap end stud" which looks like this. Put a nut on the short end with some Locktite and it's close to what you want.

McMaster-Carr has them close to what you need.