1970-73+++ Crossmember Fasteners

Discussion in 'Original Drivetrain Topic' started by CamarosRus, Sep 28, 2017.

  1. CamarosRus

    CamarosRus Veteran Member

    The AIM doesnt have diagram or description on Crossmember Fasteners......

    Can YOU detail what they are.....Are the nuts "regular" are same as those
    self locking engine mount nuts ???

    Pictures ???

  2. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

    May 5, 2005
    Rockford, MN
    Good question.. I can't recall if they were triangled or dimpled on the end for self-locking feature or not. It would seem to reason that they would be.
  3. l16pilot

    l16pilot Veteran Member Lifetime Gold Member

    Dec 13, 2004
    Hurlock, MD, USA
    As I recall, AMK has a kit. Nuts are regular phospated hex nuts and I believe a split lockwasher is used. Based on the originals I removed, the AMK kit seemed correct.
  4. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

    Feb 26, 2004
    Bloomington, MN
    ^ +1
    I'm pretty sure standard hex nuts and lock washers were used as the factory fasteners.
  5. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

    May 5, 2005
    Rockford, MN
    My fasteners are from AMK too but can't recall what they were. Unfortunately they're not even visible once everything is together.
    Logic seems that the assembly line process would use a 1 piece nut to simplify things but not always I guess.

    I do seem to recall always using a lock washer & nut during my younger years when I was pulling the engine & trans frequently because I was... ummm always pushing the limits ;)
  6. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    Oct 3, 1999
    Beavercreek, Ohio, USA
    Washers and nuts were all I ever remember finding, but I never had a car that I knew was 100% untouched in the transmission area. Somebody had always had it out at least once before I arrived.
  7. prestodixo

    prestodixo Veteran Member

    Aug 9, 2003
    Andover, Minnesota
    Page 83 of the 1973 assembly manual only says 'nut and P. washer'. I can not find a definition for P. washer.
  8. carnino73

    carnino73 Veteran Member

    Apr 2, 2005
    Hoquiam WA
    My 04A 73 Z-28 with Turbo 400 has these in the rear cross member. 3/8 NC 1 1/8 long under head, Washer head on bolt measures 3/4 wide. 73 BOLTS 005 resize.jpg 73 BOLTS 003 resize.jpg
    McCune likes this.
  9. CamarosRus

    CamarosRus Veteran Member

    Thank You Carnino.....I will select these from my refinished fasteners

    Do you know of anyone in your area, that has a Non Air Interior Heater
    Box (under the dash) ...Also need Power Steer Gear Box (2 3/4 Turns)

    My email is below

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