Why are Door Bolts Pointy?, P/N 111899145 |
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Why are Door Bolts Pointy?, P/N 111899145 |
Highland |
Aug 12 2019, 07:08 PM
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#1
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Senior Member Group: Members Posts: 511 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California |
Was wondering why the door bolts are pointy. Can I replace them with standard M8 X 22 coarse thread bolts? I know they're listed as 27 mm, but I assume that includes the point.
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Superhawk996 |
Aug 12 2019, 07:14 PM
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#2
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914 Guru Group: Members Posts: 5,726 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
In a manufacturing environment pointy or dog head bolts allow power tools to drive the fastener quicker and better with power tools. The point helps the bolt find center quickly and reduces the risk of cross threading without having to hand start bolts.
I have no idea how Porsche assembled back in the day, but, it's likely Hans held the door in position and Franz drove the bolts quickly with an air tool as Hans complained that it was about time to swap jobs and Franz should hold some doors in position. (IMG:style_emoticons/default/happy11.gif) Probably rough fit to hold in position 1st and tweaked later. |
TargaToy |
Aug 12 2019, 07:28 PM
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#3
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-NONSOLIS RADIOS SEDIOUIS FULMINA MITTO- Group: Members Posts: 692 Joined: 26-March 10 From: DelMarVa Peninsula Member No.: 11,509 Region Association: MidAtlantic Region |
So your bung hole doesn’t slam shut!
Oh, sorry. I thought you asked why turds are pointy... |
Superhawk996 |
Aug 12 2019, 07:31 PM
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#4
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914 Guru Group: Members Posts: 5,726 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
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bbrock |
Aug 12 2019, 08:22 PM
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#5
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Pointy also makes it easier for a one-person door install with a hand socket. The self centering bolt is just what you need to hold the door with one arm and get a bolt started in the top hinge with a socket wrench. Doing that with a regular bolt wouldn't be impossible, but a lot harder and greater chance for cross threading.
Oh - and also so your bunghole doesn't slam shut. (IMG:style_emoticons/default/happy11.gif) |
mepstein |
Aug 12 2019, 08:40 PM
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#6
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914-6 GT in waiting Group: Members Posts: 19,223 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
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IronHillRestorations |
Aug 12 2019, 09:49 PM
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#7
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I. I. R. C. Group: Members Posts: 6,714 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
The reason they have a point is because the nut plate they bolt into floats in it's bracket in the door jamb and the point guides the bolt into the threaded boss in the nut plate.
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raynekat |
Aug 12 2019, 10:12 PM
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#8
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Advanced Member Group: Members Posts: 2,153 Joined: 30-December 14 From: Coeur d'Alene, Idaho Member No.: 18,263 Region Association: Pacific Northwest |
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rgalla9146 |
Aug 13 2019, 04:35 AM
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#9
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Advanced Member Group: Members Posts: 4,544 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None |
Was wondering why the door bolts are pointy. Can I replace them with standard M8 X 22 coarse thread bolts? I know they're listed as 27 mm, but I assume that includes the point. Not on early cars. For ease of assembly. Have you seen what fasteners look like in modern cars ? All are tailored for powered/robotic assembly. |
Krieger |
Aug 13 2019, 07:46 AM
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#10
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Advanced Member Group: Members Posts: 4,693 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None |
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Superhawk996 |
Aug 13 2019, 08:52 AM
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#11
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914 Guru Group: Members Posts: 5,726 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Was wondering why the door bolts are pointy. Can I replace them with standard M8 X 22 coarse thread bolts? I know they're listed as 27 mm, but I assume that includes the point. Not on early cars. For ease of assembly. Have you seen what fasteners look like in modern cars ? All are tailored for powered/robotic assembly. Spot on. Modern fasteners are designed for manufacturing. Notice many modern fasteners also have captive washers. Avoids wasted time and lost $$ being scattered on the floor from dropped parts as a line operator tries to put a washer on the fastener. Also ensures they don't forget to put on the washer. Here's a picture of modern bolt with dog point and a captive washer. Much less likely to cross thread than the pointed bolt in OP. |
Mark Henry |
Aug 13 2019, 06:44 PM
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#12
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
So your bung hole doesn’t slam shut! Oh, sorry. I thought you asked why turds are pointy... I'm still trying to perfect the perfect pinch. That's when you pinch off a loaf so cleanly that you don't have to wipe. TMI (IMG:style_emoticons/default/confused24.gif) |
TonyA |
Aug 14 2019, 01:39 PM
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#13
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Nachmal Group: Members Posts: 459 Joined: 17-November 16 From: Hilltown PA Member No.: 20,596 Region Association: North East States |
So your bung hole doesn’t slam shut! Oh, sorry. I thought you asked why turds are pointy... I'm still trying to perfect the perfect pinch. That's when you pinch off a loaf so cleanly that you don't have to wipe. TMI (IMG:style_emoticons/default/confused24.gif) Great technique to use while camping!! |
malcolm2 |
Aug 14 2019, 02:03 PM
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#14
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Advanced Member Group: Members Posts: 2,738 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
So your bung hole doesn’t slam shut! Oh, sorry. I thought you asked why turds are pointy... I'm still trying to perfect the perfect pinch. That's when you pinch off a loaf so cleanly that you don't have to wipe. TMI (IMG:style_emoticons/default/confused24.gif) Change your diet KETO and Atkins..... Lots of cheese and protein. |
eatpez |
Sep 11 2019, 07:36 PM
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#15
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Newbie Group: Members Posts: 18 Joined: 4-October 18 From: Michigan Member No.: 22,543 Region Association: North East States |
Does anyone know if these bolts are M8x1.00 or M8x125? I pulled them out of my project car and I honestly can't tell for sure with the thread guide. I want to chase the threads in the plates but obviously don't want to screw that up.
The link to the VW chassis bolts shows M8x125 but I'd swear the ones that go back in easily are M8x1.00. |
eatpez |
Sep 11 2019, 07:47 PM
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#16
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Newbie Group: Members Posts: 18 Joined: 4-October 18 From: Michigan Member No.: 22,543 Region Association: North East States |
Does anyone know if these bolts are M8x1.00 or M8x125? I pulled them out of my project car and I honestly can't tell for sure with the thread guide. I want to chase the threads in the plates but obviously don't want to screw that up. The link to the VW chassis bolts shows M8x125 but I'd swear the ones that go back in easily are M8x1.00. Definitely M8x1.25. The passenger side all went in fine. Now for some careful thread restoration.... |
Highland |
Sep 11 2019, 09:48 PM
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#17
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Senior Member Group: Members Posts: 511 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California |
Were the original door bolts painted in the car's color or plated?
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mepstein |
Sep 12 2019, 04:35 AM
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#18
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914-6 GT in waiting Group: Members Posts: 19,223 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
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