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1st Jan 2022, 09:53 PM #1
NUT, hex., S., %-24NF-2 (steering arm stud).
Hi
I need to make some special 3/8 UNF 'deep' nuts for a Jeep project. The steering knuckle studs require long or deep nuts , around .5" in length.
The originals are corroded and I am guessing are probably a grade 5 nut in todays terminology.
I could probably use hex bar and make them but what grade of steel is suitable and it needs to be soft enough to be hand tapped ?
Thanks
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1st Jan 2022, 10:16 PM #2Gear expert in training
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1045 would probably do, 4140 if you want to go nuts
Gear cutting specialists and general engineers www.hardmanbros.com.au
Fine pitch gear cutting from 0.1 Module www.rigear.com.au
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1st Jan 2022, 10:19 PM #3Diamond Member
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These might be suitable
https://www.unitedfasteners.com.au/p...t#product-list
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1st Jan 2022, 11:03 PM #4
Yep thanks
Yes I did find those last night - But I am not sure about the 'bright' grade . Do they mean mild steel I wonder. I guess I could ask them.
Would 303 grade stainless be an option ? Problem is finding it in hex bar.
I did think of 1045 , it probably would be OK but not easy to find in hex bar around here, I might ask at the machine shop in town.
Found these: https://nhtb.com.au/ND%2038F%20BRT.html
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2nd Jan 2022, 04:13 PM #5
Do you mean 5" long Morrisman ? Or .5" -half inch?
If ss is alright to use, what about two stainless steel joiner nuts tacked together?
I have seen them in smaller sizes ,so assume you can get larger ones.
Just thinking out of the box. Where is the force on these nuts .In tension, compressive or lateral?
Grahame
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2nd Jan 2022, 07:49 PM #6Most Valued Member
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They’re available off the shelf in 304 stainless if you googlefu 3/8 UNF Stainless coupling nut. Standard size seems to be 1 1/8” long.
Personally I would not put stainless in the suspension of a motor vehicle
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2nd Jan 2022, 08:05 PM #7Most Valued Member
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2nd Jan 2022, 08:26 PM #8Most Valued Member
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2nd Jan 2022, 09:53 PM #9Diamond Member
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In a way the grade of nut used isn't important.
The forces on the steering knuckle are transmitted to the suspension via the tapered shank and socket, there are no forces on the nut itself.
The main jobs of the nut are to pull the taper up tight in the socket and to act as a safety should the taper come loose in the socket.
From what I see of hex steel its mainly leaded steel.
Assuming you do want to go with say 1045, for the small quantity you need it will probably be easiest to mill your own from round.
If it were me I would be making the hex first and then doing the tapping.
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2nd Jan 2022, 10:48 PM #10
Good
They will do the job.
The image shows the steering setup . The pre-load spindle setup using the shims is a critical adjustment on these old Jeeps , if not set up correctly the steering can go into a uncontrollable situation known as the 'death wobbles' which is when a wild side to side oscillation of the front wheels can occur. Driving over a railway crossing at speed can set it off , some people fit a steering damper but that isn't a ideal solution.
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3rd Jan 2022, 08:19 AM #11Most Valued Member
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3rd Jan 2022, 11:58 AM #12
Getting further out of the box! Why does it have to be a hex section? Would a round bar drilled and tapped and with two parallel turning flats suffice?
If no mill, Hacksaw and file or tack a hex nut (drilled for clearance) to lock or turn it.
Never give in or give up.
Grahame
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3rd Jan 2022, 12:03 PM #13
[QUOTE=bob ward;1993051]
From what I see of hex steel its mainly leaded steel. [QUOTE]
Best NOT to weld on leaded steel then. My bad!
Grahame
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4th Jan 2022, 12:59 AM #14
MOre
The allfast mob in N.Z.... turns out they are a wholesaler to the trade and they are not interested in a backyard hobby person.
I think I can source some 1045 from ABC metals in Hallam, they are a short walk from the train station , I have a MYKI card somewhere ! Apparently Stainsfied-Smith has closed which is a real shame because they had in stock just about anything you needed. The present situation means I'm not sure about travelling anywhere right now , the COVID cases have gone nuts in Victoria .
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4th Jan 2022, 05:12 AM #15Senior Member
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Surely you aren't the first to encounter this problem, what have others done?
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