Any source for Out put shaft differential torx bolts PN#33211227279

[acheson850i]

Hi,

If any body has any of these torx bolts, new, perhaps leftover from a diff swap and just "lying around", I would be interested in buying them from you. New, they range in price from abt 7 to 12 USD a piece ! Getting ready to swap out my differential.

Thanks!

Scott

[radlaw]

Check out http://www.ebay.com/itm/33211227279-...-/251445072290

[toomanyparts]

I have no non-torx versions laying around new from BMW. I bought these for a diff swap I never did. As Olin pointed out in his excellent swap how to thread, the ss part number is the non torx version.

[dudu850]

I went this route a couple weeks ago and ended buying new 10.9 allen headed screws at a hardware store ( 0,55€ each.. )...

[acheson850i]

I have no non-torx versions laying around new from BMW. I bought these for a diff swap I never did. As Olin pointed out in his excellent swap how to thread, the ss part number is the non torx version.

I have read Olin's excellent thread but I must have missed something! The only thing I do not have (besides brains ) is money and the Torx bolts!

What is the "ss part number" that you are referring to?

So, are you saying that you have 12 new non torx versions of the bolts and that you would like to sell them? Thanks for clarifying!

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I went this route a couple weeks ago and ended buying new 10.9 allen headed screws at a hardware store ( 0,55€ each.. )...

Thanks I will look into this!

[affa]

+1 on 10.9 allen bolts.

I actually used bumax109 stainless bolts. Equivalent to 10.9 but will never rust.

[toomanyparts]

+1 on 10.9 allen bolts.

I actually used bumax109 stainless bolts. Equivalent to 10.9 but will never rust.

I guess my question is if they are heat treated the same way as the OEM versions? I know this matters for studs on the heads and so forth.

I know this is posted on Ebay, but it is still a good read. http://www.ebay.com/gds/Stainless-Bo...1623345/g.html

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I messed up, you are already using the right part number of 33211227279. I do indeed have 12 of them that I am willing to part with. I paid $9.52 a piece at a discount dealer. ECStuning has them in a pack of 15 for $162.60. I would be happy to get of them for close to what I paid.

I have read Olin's excellent thread but I must have missed something! The only thing I do not have (besides brains ) is money and the Torx bolts!

What is the "ss part number" that you are referring to?

So, are you saying that you have 12 new non torx versions of the bolts and that you would like to sell them? Thanks for clarifying!

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Thanks I will look into this!

[acheson850i]

+1 on 10.9 allen bolts.

I actually used bumax109 stainless bolts. Equivalent to 10.9 but will never rust.

The bolts sold on the EBAY link posted earlier end with the term "NS3 Coat." I am not a metallurgist but I believe this may refer to "Nickel-silver" which is not actually Nickel or Silver. Wikipedia is amazing. I know more about ASTM standards for bolts and nuts than I ever cared to know about! Worst thing that could happen with 10.9 grade that were not coated is they would rust a lot more quickly than the coated bolts. I'll checkout the bumax109 bolts. They maybe equivalent. 7 bucks a bolt ain't too bad for bolts that would appear to meet OEM spec.

[affa]

The bumax stuff are very good, typically used for offshore drilling, ocean racing, paper mills and generally harsh environments. The 88 line is equivalent to metric 8.8 and the 109 for the 10.9.

Assuming quality production and certification, and that's a big assumption, 10.9 is 10.9 is 10.9. It's a metallurgical rating. For our usage the only differences are in the plating if applied. Obviously I'm simplifying in regards to thread fit, etc

Cadmium is generally best but now banned unless you're in aerospace or military. Aluminum alloy cladded ones are the next best thing but hard to find in retail quantities.

That leaves us zinc, which is pretty good. Go for yellow zinc, slightly better than clear zinc.

[shogun]

Any aftermarket source? BMW is asking for too much with abt. $17/piece torx screw M10X50, OE Numbers 33211227279, old # 33211227073
Non torx version would also be no problem as long as the size and the metallurgical rating is same/similar, also the color = zinc coated would be o.k.
In German they call them RIPP-Schrauben , Flanschschrauben mit Sperr-Rippen unter dem Flansch.

These original BMW bolts in that size are no longer available in the market and what is on the market is remaining stock, and that is why the prices are so high.
So we have to buy aftermarket, there are bolts available in these sizes but usually without these lock ribs = Sperr - Rippen under the head. That is in general no problem if we use lock washers. Torx or hex head does not matter.

[affa]

My 2c...

It depends on what the owner wants to achieve....

1. If the owner just want to make it safe and make it work, I have no issue reusing the bolts if they are not "too chewy". Fact is the factory directions are there to achieve service quality parity amongst dealerships with mechanics of varying degrees of skill and care (and dare I say intelligence). Looking at the factory torque spec the fasteners are nowhere near TTY so the only reason to specify replacement is because the factory new bolts are "micro encapsulated" i.e. pre-applied Loctite. So if one follows good practice, clean the threads on both sides and use the proper Loctite, I don't see an issues. COUNTLESS vehicles are on the streets with reused bolts for the same reason.

1.1 If the bolts are chewed up, an identically graded bolt (e.g. 10.9) of non-suspect origin/supplier is fine. Many studies have conclusively proven with exception of nord lock, pretty much all mechanical thread locking mechanisms are junk so don't waste time looking for the unicorn serrated bolts, trust in Loctite. The sh1t took us to the moon and back, its good enough for you.

2. You are a "concourse" guy - good luck looking for and paying OE bolts. If you have a deep pocket you can always commission a batch from kamax, boesner, verbus or other quality manufacturers etc.

3. You're a some is good, more is better and too much is just enough kind of overkill guy - Use bumax109, nord lock and Loctite. Guaranteed to outlast you.

If you're in the US finding decent metric fasteners could be a pain. Fastenal is ok but no where as nice as McMaster-carr(*) stuff. also heard good things from bel-metric.

(*) Used to order from them until they changed their policy and decided everyone outside (or suspected to be outside) of USA are terrorists and will not take your order (yeah seriously).

[shogun]

A normal hex bolt will not fit properly, here shown on an E32 750 driveshaft posted on a German E32 forum.
I moved a copy of this thread from the E31 forum to E32 forum, as these bolts are also used on E32.
http://www.realoem.com/bmw/enUS/part...&q=33211227279
33211227279 Torx screw M10X50 From:09/01/1990 To:- Weight:0.030 kg
Supersedes:
33211227073(09/01/1989 — 01/17/2001)
Part 33211227279 was found on the following vehicles:
•3' E30   (01/1985 — 02/1994)
•3' E36   (11/1989 — 12/1998)
•5' E34   (07/1987 — 06/1996)
•7' E32   (11/1986 — 08/1994)
•7' E38   (07/1993 — 07/2001)
•8' E31   (07/1989 — 05/1999)
•Z1 Roadster   (07/1988 — 06/1991)
•BMW Classic Motorsport   (01/1928 — 09/1932)

Mfg Part #33211227279 ECS Part #ES#56895 Brand Genuine BMW ..::Note:::..This product is no longer available. Previous Revisions 33211227073
https://www.ecstuning.com/b-genuine-...t/33211227279/

[shogun]

Here we have something much cheaper, 2mm longer, BMW Torx Screw With Ribs (M10X52 Zns3) Chrome-free CR(VI)- Genuine BMW 26117526322 https://www.ecstuning.com/b-genuine-...t/26117526322/
Price each: $3.79 for example at FCP EURO http://www.realoem.com/bmw/enUS/partxref?q=26117526322

[Chamberlin]

Here we have something much cheaper, 2mm longer, BMW Torx Screw With Ribs (M10X52 Zns3) Chrome-free CR(VI)- Genuine BMW 26117526322 https://www.ecstuning.com/b-genuine-...t/26117526322/
Price each: $3.79 for example at FCP EURO http://www.realoem.com/bmw/enUS/partxref?q=26117526322

Thanks for this alternative! The proper bolts are $14-$26 a piece now. I've got 12 M10 E-TORX bolts from an E36 M3 laying around, but they seem a touch short for the application. So no reported length problems with the cadmium plated bolts you linked that are 52mm instead of 50mm? Getting ready to put the E32 3.15LSD into my E31.

Also found these bolts from a MINI steering rack, which also seem workable: BMW part number 32106774042

[shogun]

Thanks for this alternative! So no reported length problems with the cadmium plated bolts you linked that are 52mm instead of 50mm? Getting ready to put the E32 3.15LSD into my E31.Also found these bolts from a MINI steering rack, which also seem workable: BMW part number 32106774042

so far I have not read of any probs

[Chamberlin]

so far I have not read of any probs

Thanks for the confirm Shogun - I think I'm going to try the M10x1.5x50mm MINI steering rack bolts. I will report back later this year once the new diff. is installed!

[whiteghost1]

I'm not sure of the thread pitch of the OE bolts, but one of these might work:

https://www.fastenal.com/products/details/1139623?r=~%7Ccategoryl1:%22600000%20Fasteners%22% 7C~%20~%7Ccategoryl2:%22600039%20Sockets%22%7C~%20 ~%7Ccategoryl3:%22600040%20Socket%20Cap%20Screws%2 2%7C~%20~%7Csattr01:%5EMetric$%7C~%20~%7Csattr04:% 5E%22M10%20-%201.5%22$%7C~

https://www.fastenal.com/products/details/35760?r=~%7Ccategoryl1:%22600000%20Fasteners%22%7C ~%20~%7Ccategoryl2:%22600039%20Sockets%22%7C~%20~% 7Ccategoryl3:%22600040%20Socket%20Cap%20Screws%22% 7C~%20~%7Csattr01:%5EMetric$%7C~%20~%7Csattr04:%5E %22M10%20-%201.5%22$%7C~%20~%7Csattr04:%5E%22M10%20-%201.25%22$%7C~

[Chamberlin]

I believe the pitch is standard M10x1.5, but I think the idea was to get away from hex head socket cap screws, hence the factory change to E-TORX for the torque needed here.

[whiteghost1]

I believe the pitch is standard M10x1.5, but I think the idea was to get away from hex head socket cap screws, hence the factory change to E-TORX for the torque needed here.

Any bolt even a measly grade 5 bolt will have enough tensile or shear strength for what is required in this application, just guessing arbitrarily, by at least by a safety factor of 1000x. Just throwing out options for those who do not what to spend $15+/per bolt from BMW

[Chamberlin]

Got the bolts for the MINI steering rack which will work for the output shafts....

[Budget M3]

I'm not sure of the thread pitch of the OE bolts, but one of these might work:

https://www.fastenal.com/products/details/1139623?r=~%7Ccategoryl1:%22600000%20Fasteners%22% 7C~%20~%7Ccategoryl2:%22600039%20Sockets%22%7C~%20 ~%7Ccategoryl3:%22600040%20Socket%20Cap%20Screws%2 2%7C~%20~%7Csattr01:%5EMetric$%7C~%20~%7Csattr04:% 5E%22M10%20-%201.5%22$%7C~

https://www.fastenal.com/products/details/35760?r=~%7Ccategoryl1:%22600000%20Fasteners%22%7C ~%20~%7Ccategoryl2:%22600039%20Sockets%22%7C~%20~% 7Ccategoryl3:%22600040%20Socket%20Cap%20Screws%22% 7C~%20~%7Csattr01:%5EMetric$%7C~%20~%7Csattr04:%5E %22M10%20-%201.5%22$%7C~%20~%7Csattr04:%5E%22M10%20-%201.25%22$%7C~

The first link is the proper size. The second link has the wrong thread pitch (1.25 pitch versus the 1.50 which is needed for our application.).

BTW, the 1.25 is used on the 91 US M5 and Euro M5 output shafts. Why not just use the same size for everyone????

[Budget M3]

Here is a link to the correct size with all of the options for coatings—black, zinc, stainless and even blue!

https://www.fastenal.com/products/fa...10 - 1.5"$%7C~