Steering column plate to firewall bolts?

Discussion in 'Body Restoration' started by Adams, Oct 4, 2020.

  1. steins70z28

    steins70z28 Veteran Member

    Messages:
    312
    Likes Received:
    51
    Joined:
    Apr 14, 2012
    Location:
    Tulsa, OK
    Hard to see in the pic but a thread gauge 7/16 - 14 doesn't line up as it would with a standard threaded bolt but it is close. There is a small gap between the bolt (screw) and the gauge because of the sheetmetal type screw pattern. 20201004_173203-1.jpg
     
  2. Adams

    Adams Veteran Member Lifetime Gold Member

    Messages:
    929
    Likes Received:
    27
    Joined:
    Jul 16, 1999
    Location:
    From Motown (still in the blood), live in Houston
    Thanks for the help and photos. Looks like I can run in the 7/16"-14 die before I put the new bolts in. The taper on the bolt should not matter if the threads line up that close.
     
  3. chuck13

    chuck13 Member

    Messages:
    45
    Likes Received:
    14
    Joined:
    Jan 30, 2016
    Location:
    louisiana
    Correct me if I'm wrong,but sheetmetal screws are numbered-#10,#12 etc.And are also self tapping.I don't recall exactly what size these screws are,but it seems like a 7/16" socket fit them.So a 7/16x14 tap is gonna be WAY too big.
     
  4. badazz81z28

    badazz81z28 Veteran Member

    Messages:
    20,373
    Likes Received:
    1,334
    Joined:
    May 4, 2001
    Location:
    Alabama
    7/16” thread seems way big to me....the socket head is 7/16” that makes it a 1/4” thread? I’ll have to look but I thought the socket head was 1/2”
     
    TommyRS70 likes this.
  5. steins70z28

    steins70z28 Veteran Member

    Messages:
    312
    Likes Received:
    51
    Joined:
    Apr 14, 2012
    Location:
    Tulsa, OK
    You guys are correct it is not a 7/16, I should have double checked the size, being that it is basically a sheet metal screw, conventional thread gauges will steer you in the wrong direction.
     
  6. steins70z28

    steins70z28 Veteran Member

    Messages:
    312
    Likes Received:
    51
    Joined:
    Apr 14, 2012
    Location:
    Tulsa, OK
    Probably best course of action is to determine the actual screw size and see if you can find one that has the self tapping feature and use it to clean up your theads.
     
    Adams likes this.
  7. badazz81z28

    badazz81z28 Veteran Member

    Messages:
    20,373
    Likes Received:
    1,334
    Joined:
    May 4, 2001
    Location:
    Alabama
    I'm just not convinced its a sheet metal screw...the nut plate is threaded....I need to go look at mine. I’m thinking 1/4-20....
     
    Last edited: Oct 7, 2020
  8. Adams

    Adams Veteran Member Lifetime Gold Member

    Messages:
    929
    Likes Received:
    27
    Joined:
    Jul 16, 1999
    Location:
    From Motown (still in the blood), live in Houston
    Camaro Central sent 1/4" but way more course than a 20. Not sure but 14 is pretty close. It is some sort of sheet metal screw. Since whoever put in the last one put in a 3/8" and cross threaded it I will need to go with at least a 3/8". I will go find a fender bolt in 3/8" and try to find a comparable tap. If not I will hope the bolt will self tap or clean the nut head.
     
  9. badazz81z28

    badazz81z28 Veteran Member

    Messages:
    20,373
    Likes Received:
    1,334
    Joined:
    May 4, 2001
    Location:
    Alabama
    Maybe thats why they ares boogered up. Someone put the wrong screws in there in the past.
     
  10. KingofThings

    KingofThings Veteran Member

    Messages:
    288
    Likes Received:
    88
    Joined:
    May 8, 2020
    Most cities should have a fastener store these days where you can buy just one bolt though at a minimum charge so I buy more or other items for they will have far more than bolts.
     

Share This Page