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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Oct-25-2017, 10:09:14 PM   #1
TboneM3
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Default Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Hi there,

Sometimes you need to replace a nut and you don't want to go to a dealer or order online, just down the street to the hardware store for a $0.40 nyloc nut.

Easy part is everything (bmw) is metric.

M14x1,5 (commas in Europe are like periods here) is a nut or bolt that has a diameter of 14mm and the pitch is 1.5mm. Easy enough.

What I'm hoping is that someone knows what these other specs BMW gives on their hardware as I'm trying to figure out if I need coarse, fine or extra fine on certain hardware.

Example: (from realoem)
02 Self-locking collar nut M8-8 ZNS3 6 31316769731 $0.38
03 Plate 2 31332229427 $3.97
04 SELF-LOCKING HEX NUT M14X1,5-05 ZNS3 31106774714 $1.12
05 self-locking flange nut M10x1-8 ZNS3


So in this case, what does the 8 mean after M8? I'm thinking ZNS3 is some sort of zinc coating/hardening rating.

the M14x1,5 is easy like I put above, but what does the -05 mean?

Here's another, M10x1-8 - is this a M10 nut (10mm) with a 1mm pitch? What's the 8 doing after the 1?

These examples above are all nuts, so no length to worry about like a bolt, e.g., m10x1,5x30mm

Are these extra numbers hardness ratings? If so, how do we know if a pitch is coarse or fine?

Some size of nuts/bolts only have one type of pitch, but some like 8 and 10mm have coarse and fine and that's the part I'm needing to know.

I've search but can only find info about the diameter and pitch which I already know when it's laid out in a normal way like M14x1,5.

Appreciate any knowledge here and maybe this can help others in the future.

I've attached a nice chart of common sizes as an helpful guide.

Thanks
Attached Images
File Type: gif metric.gif (40.5 KB, 36 views)
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Last edited by TboneM3; Wed, Oct-25-2017 at 10:15:38 PM.
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Old Wed, Oct-25-2017, 11:04:46 PM   #2
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications


The grade of the metal is usually stamped on the bolt/nut. Example: 8.2 which is low carbon steel.
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Old Thu, Oct-26-2017, 03:36:45 AM   #3
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Anybody?

My best guess so far is the -8 or -05 at the end probably is the grade, but then that means that some of the specs of the nuts and bolts are missing the pitch like M8-8 - are we to believe it's a grade 8 m8 nut? But what pitch?

But then on the shock nut, M10x1-8, it makes sense - an m10 nut with 1mm pitch & grade 8 steel, if that's what they actually mean. It's not consistent

Anybody work in the parts department at a BMW dealer?
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/// 2004 SilberGrau M3 · Coupe · 6MT · slicktop · manual seats · zero options · JOURNAL
-NA S54-


·Evolve-R Alpha N · Evolve CSL CF Airbox · Eventuri Scoop · Supersprint V1 stepped 63mm · SS V1 S pipe 63mm + 200 cell HFC · OE sect 2 60mm · SS Sport 60mm
·Besian · RE pullies/fan delete · WPC rod bearings · GroundControl S/A (Koni/Eibach 440/550) + tall RSMs · TMS Camber & Subframe plates · SPC Adj alloy rear camber arms
·RE Trans Mounts · AKG poly SUB/DIFF 95a · SDW RTAB · Weighted ///M knob + UUC DSSR + delrin carrier bush · OE CSL trunk · APEX 75mm Studs
·Sportline 8S 18"x8.5/9.5" · MPSS 245/275 · Brembo 996 36/40 345mm CSL Textar FF & 28/30 328mm CSL ATE "D738" FF · CM brackets & ss/teflon lines
·Pioneer DEH-80PRS · Eclipse PA5422 · CDT HD-6 + WS-100i · CDT EX-530 · 8" Kicker

DD/Beater: 1999 Civic LX - Kenwood x998 · PPI 1600.4 · CDT HD-6 + HD-100 · CDT EX-530 · DVC 10"

Last edited by TboneM3; Thu, Oct-26-2017 at 03:47:51 AM.
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Old Thu, Oct-26-2017, 06:38:45 AM   #4
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

maybe try contacting Mr. Metric from the video?
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Old Thu, Oct-26-2017, 07:00:35 AM   #5
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Is he a BMW guy?

It just seems to be BMW issue, that they provide the full specs on some hardware and not other. Or maybe there's a trade secret, like if it's not listed is coarse and if it's listed, it'll be fin, for example. IDK, that's why I'm hoping there's a BMW employee or someone who knows the deal lol.
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/// 2004 SilberGrau M3 · Coupe · 6MT · slicktop · manual seats · zero options · JOURNAL
-NA S54-


·Evolve-R Alpha N · Evolve CSL CF Airbox · Eventuri Scoop · Supersprint V1 stepped 63mm · SS V1 S pipe 63mm + 200 cell HFC · OE sect 2 60mm · SS Sport 60mm
·Besian · RE pullies/fan delete · WPC rod bearings · GroundControl S/A (Koni/Eibach 440/550) + tall RSMs · TMS Camber & Subframe plates · SPC Adj alloy rear camber arms
·RE Trans Mounts · AKG poly SUB/DIFF 95a · SDW RTAB · Weighted ///M knob + UUC DSSR + delrin carrier bush · OE CSL trunk · APEX 75mm Studs
·Sportline 8S 18"x8.5/9.5" · MPSS 245/275 · Brembo 996 36/40 345mm CSL Textar FF & 28/30 328mm CSL ATE "D738" FF · CM brackets & ss/teflon lines
·Pioneer DEH-80PRS · Eclipse PA5422 · CDT HD-6 + WS-100i · CDT EX-530 · 8" Kicker

DD/Beater: 1999 Civic LX - Kenwood x998 · PPI 1600.4 · CDT HD-6 + HD-100 · CDT EX-530 · DVC 10"
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Old Thu, Oct-26-2017, 08:39:46 AM   #6
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

http://images.gasgoo.com/attachment/.../001402193.pdf

ZNS3 is a Zinc Flake Coating as outlined in the PDF.

If the pitch isn’t listed you will need to use first hand experience, cross reference with a possible bolt also used in the application, reference internet images or guess. ETK is full of missing information, but is otherwise an invaluable reference tool.

Last edited by Braymond141; Thu, Oct-26-2017 at 08:47:45 AM.
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Old Thu, Oct-26-2017, 01:42:55 PM   #7
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Quote:
Originally Posted by TboneM3 View Post
So in this case, what does the 8 mean after M8? I'm thinking ZNS3 is some sort of zinc coating/hardening rating.
Pretty sure -8 indicates strength grade, but if that's the case, it's standard class nomenclature and not metric.
Tensile = 150,000 psi
Yeild = 130,000 psi



Quote:
Originally Posted by TboneM3 View Post
Here's another, M10x1-8 - is this a M10 nut (10mm) with a 1mm pitch? What's the 8 doing after the 1?
Same as above



Quote:
Originally Posted by TboneM3 View Post
I've search but can only find info about the diameter and pitch which I already know when it's laid out in a normal way like M14x1,5.
Same as above but a grade 5
Tensile = 120,000 psi
Yeild = 92,000 psi



Real OEM, and most BMW catalogs, are hard to decipher. Usually they're populated from a master parts catalog and whomever translates for different countries doesn't necessary apply the correct nomenclature.
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Old Thu, Oct-26-2017, 04:07:50 PM   #8
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Quote:
Originally Posted by SliM3 View Post
Pretty sure -8 indicates strength grade, but if that's the case, it's standard class nomenclature and not metric.
Tensile = 150,000 psi
Yeild = 130,000 psi





Same as above





Same as above but a grade 5
Tensile = 120,000 psi
Yeild = 92,000 psi



Real OEM, and most BMW catalogs, are hard to decipher. Usually they're populated from a master parts catalog and whomever translates for different countries doesn't necessary apply the correct nomenclature.
I'm pretty sure that M14x1,5 should be translated as M14x1.5, not grade 5 M14x1. Otherwise, I agree.
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Old Thu, Oct-26-2017, 05:08:27 PM   #9
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Got no idea what the second number means.
But I'll bet my left nut (pun intended) that it isn't a reflection of the strength category.
The very thought of using an imperial rating on a metric fastener would be appalling to ANY German. Probably the very thought that imperial fasteners exist appalls them!
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Old Thu, Oct-26-2017, 05:13:05 PM   #10
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Default Re: Understanding RealOEM (ETK) hardware (nuts/bolts) specifications

Quote:
Originally Posted by nowanker View Post
Got no idea what the second number means.
But I'll bet my left nut (pun intended) that it isn't a reflection of the strength category.
The very thought of using an imperial rating on a metric fastener would be appalling to ANY German. Probably the very thought that imperial fasteners exist appalls them!
That's actually a great point!

Thanks Braymond, that's the closest I'll get to answer I think - we'll just never know the pitch on some of these just looking at realOEM as that info is just missing.

Yes, M14x1,5 is def 1.5mm pitch as I said earlier, the "," is a "." In europe.
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/// 2004 SilberGrau M3 · Coupe · 6MT · slicktop · manual seats · zero options · JOURNAL
-NA S54-


·Evolve-R Alpha N · Evolve CSL CF Airbox · Eventuri Scoop · Supersprint V1 stepped 63mm · SS V1 S pipe 63mm + 200 cell HFC · OE sect 2 60mm · SS Sport 60mm
·Besian · RE pullies/fan delete · WPC rod bearings · GroundControl S/A (Koni/Eibach 440/550) + tall RSMs · TMS Camber & Subframe plates · SPC Adj alloy rear camber arms
·RE Trans Mounts · AKG poly SUB/DIFF 95a · SDW RTAB · Weighted ///M knob + UUC DSSR + delrin carrier bush · OE CSL trunk · APEX 75mm Studs
·Sportline 8S 18"x8.5/9.5" · MPSS 245/275 · Brembo 996 36/40 345mm CSL Textar FF & 28/30 328mm CSL ATE "D738" FF · CM brackets & ss/teflon lines
·Pioneer DEH-80PRS · Eclipse PA5422 · CDT HD-6 + WS-100i · CDT EX-530 · 8" Kicker

DD/Beater: 1999 Civic LX - Kenwood x998 · PPI 1600.4 · CDT HD-6 + HD-100 · CDT EX-530 · DVC 10"

Last edited by TboneM3; Thu, Oct-26-2017 at 06:12:52 PM.
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Discussing Understanding RealOEM (ETK) hardware (nuts/bolts) specifications in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)