 Lug Nut Bolt Thread Count and Sizing, Stripped Bolt needs Drill and Tap |
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| R_u_dd |
 Nov 22 2014, 07:46 PM
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Member  Group: Members Posts: 154 Joined: 3-March 14 From: Grants Pass, Oregon Member No.: 17,072 Region Association: Pacific Northwest  |
What is the standard thread pattern for the lug nut bolts on 4 bolt wheels on a '71 914? I've got two stripped threads inside the hub that need to be tapped and rethreaded, but I don't know what size drill and tap to buy? Are german made nuts/bolts that are metric a different thread count than non-metric? What type of drill and tap set do I buy for those rusty bolts on a 914 that need rethreading?
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Replies(1 - 2)
| 914Sixer |
Nov 22 2014, 07:53 PM
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914 Guru Group: Members Posts: 8,906 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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14mm 1.5 pitch for the tap. Tap first, then see if you need to dill out. Make sure you use some lube. I keep some cutting oil around for such repairs.
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| bdstone914 |
Nov 22 2014, 07:56 PM
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bdstone914 Group: Members Posts: 4,537 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(R_u_dd @ Nov 22 2014, 07:46 PM)  What is the standard thread pattern for the lug nut bolts on 4 bolt wheels on a '71 914? I've got two stripped threads inside the hub that need to be tapped and rethreaded, but I don't know what size drill and tap to buy? Are german made nuts/bolts that are metric a different thread count than non-metric? What type of drill and tap set do I buy for those rusty bolts on a 914 that need rethreading? The thread is 14mm x 1.5. If the threads are stripped in the rear hub there is not much you can do but replace the hub and bearing. They should hold a torque of 90 ft lbs. If the bolts are bad just replace them. Lot of them around. If they have minor dings a thread file works well. Bruce |
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