 Seat belt bolts, Weird thread? |
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| Olympic 914 |
 Oct 15 2014, 09:23 AM
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#1
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 Group: Members Posts: 1,668 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States 
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So when my inner longs were repaired, the attachment point for the seat belt on the drivers side was not put in. now I have this old lathe I've been playing around with and decided to make an insert to weld it there for the bolt. I find a bolt that fits and check the treads and it comes up 1.25, checking it with my tap & die set, its not 10 x 1.25 and the only 11 I have is 11x 1.50.
is this thing really a 11 x 1.25? .. What an odd size |
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| mskala |
Oct 15 2014, 09:43 AM
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#2
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R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None
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QUOTE(Olympic 1.7 @ Oct 15 2014, 11:23 AM)  So when my inner longs were repaired, the attachment point for the seat belt on the drivers side was not put in. now I have this old lathe I've been playing around with and decided to make an insert to weld it there for the bolt. I find a bolt that fits and check the treads and it comes up 1.25, checking it with my tap & die set, its not 10 x 1.25 and the only 11 I have is 11x 1.50. is this thing really a 11 x 1.25? .. What an odd size Since I use beetle seat belts that came with hardware that fits the 914, I did a search: SAE 7/16-20. Which makes sense as it is really close to 1.25mm pitch and 11mm. |
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| Mike Bellis |
Oct 15 2014, 09:43 AM
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#3
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Seatbelt should be a 7/16" thread in the US.
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| ChrisFoley |
Oct 15 2014, 09:47 AM
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#4
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I am Tangerine Racing Group: Members Posts: 7,925 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(mskala @ Oct 15 2014, 10:43 AM) SAE 7/16-20. precisely. |
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| wilchek |
Oct 15 2014, 05:53 PM
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#5
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Senior Member Group: Members Posts: 506 Joined: 8-June 04 From: Eastern Pennsylvania Member No.: 2,177 |
Yep that is what it is 11x1.25. This is what I used to make sure threads were clean.
http://www.amazon.com/gp/product/B0006G4MV...=UTF8&psc=1 |
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| injunmort |
Oct 15 2014, 06:00 PM
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#6
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
7/16 20 tpi as said, dot mandated
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