 Bolt Identification Help Needed |
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| Osnabruck914 |
 Aug 1 2025, 03:49 PM
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#1
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Member  Group: Members Posts: 164 Joined: 19-December 22 From: United States Member No.: 27,038 Region Association: South East States  |
I had to re-tap and replace one of the bolts at the front of my right a-arm today. The bolt I removed is merely marked 8.8 ML. Just curious if that is the original and proper bolt to be used there. I replaced it with a 10mm 1.5 pitch 8.8 strength 40mm length bolt- OK , I guess? I am confused by the markings on the original bolt.
Osnabruck914 |
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| DennisV |
Aug 1 2025, 04:43 PM
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#2
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Senior Member Group: Members Posts: 691 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California 
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QUOTE(Osnabruck914 @ Aug 1 2025, 02:49 PM)  8.8 ML. "ML" is likely the manufacture mark. Though I'm more used to seeing Kamax, Karro, NSF, Verbus, etc. 8.8 (older 8G) are the most common. Fewer 10.9 (older 10K) are found. Even fewer 12. I believe the numbers are tensile strength. If you can locate the specific bolt in the PDF parts catalog, you will learn diameter and length. Also if you look up that part number at the various vendors you will probably find a description or image that indicates the correct tensile strength is. As I recall, all mine in that area were 8.8. |
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| wonkipop |
Aug 1 2025, 07:51 PM
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#3
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Advanced Member Group: Members Posts: 4,991 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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QUOTE(Osnabruck914 @ Aug 1 2025, 03:49 PM) I had to re-tap and replace one of the bolts at the front of my right a-arm today. The bolt I removed is merely marked 8.8 ML. Just curious if that is the original and proper bolt to be used there. I replaced it with a 10mm 1.5 pitch 8.8 strength 40mm length bolt- OK , I guess? I am confused by the markings on the original bolt. Osnabruck914 if you have the workshop manual its in there. Group 4 Front Axle. there is a table with descriptions. assuming bolt you question is Control Arm Forward Bearing to Body. Bolt M10 x 30 Grade 8G Torque 4.7 Mkp / 34 ftlbs |
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| Osnabruck914 |
Aug 2 2025, 10:30 AM
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#4
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Member Group: Members Posts: 164 Joined: 19-December 22 From: United States Member No.: 27,038 Region Association: South East States |
Hmm 30mm... I pulled two of my existing and they are 40mm. Seem to fit alright. Osnabruck914 |
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| wonkipop |
Aug 2 2025, 02:00 PM
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#5
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Advanced Member Group: Members Posts: 4,991 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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QUOTE(Osnabruck914 @ Aug 2 2025, 10:30 AM) Hmm 30mm... I pulled two of my existing and they are 40mm. Seem to fit alright. Osnabruck914 dunno here is the page.  could be they revised the bolts along the way. the factory manual i have does not seem to have all the updates in it necessarily. could be misprint. one thing for sure. your 40mm came out, and one went back in and you got more thread in there than a 30mm so got to be ok. (IMG:style_emoticons/default/beerchug.gif) |
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| Osnabruck914 |
Aug 2 2025, 02:16 PM
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#6
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Member Group: Members Posts: 164 Joined: 19-December 22 From: United States Member No.: 27,038 Region Association: South East States |
Yep, that agrees with the Parts Catalog PDF. Thanks everyone!
Osnabruck914 |
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