C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

GM Screw size: 4.5M x 75 thread angle??????????

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Old Sep 26, 2002 | 10:42 AM
  #1  
Derf's Avatar
Derf
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Burning Brakes
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Default GM Screw size: 4.5M x 75 thread angle??????????

Replacing the TPS on the Throttle body. Messed up a screw. Could not find the same size except at the GM dealer. Had to buy 14 screws to get one, 16 bucks. Screw size 4.5mx75thread. Then needed a tap to clean the threads, special order although available, 4 bucks. GM probably did this to screw with me. I could just drill it out and go with a 10mx32 but that would not be original. Just venting. :mad
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Old Sep 26, 2002 | 10:58 AM
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Nathan Plemons
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Default Re: GM Screw size: 4.5M x 75 thread angle?????????? (Derf)

:lol: Somebody else has this problem? I went to Diamond Screw here in BG. If it exists they either have it or can get it. They came to the conclusion that it doesn't exist.
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Old Sep 26, 2002 | 11:46 AM
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Default Re: GM Screw size: 4.5M x 75 thread angle?????????? (Nathan Plemons)

4.5mx75 is a common thread. Ford uses it all over their vehicles. The little hardware store up my street had plenty of nuts, bolts, taps and dies in this size.
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Old Sep 27, 2002 | 08:18 PM
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Default Re: GM Screw size: 4.5M x 75 thread angle?????????? (Rick93Z07)

If you don't mind. When your near that hardware store could you get me four 1.25" 4.5M x 75 thread angle with a torx head please. Be glad to pay for them and what mail costs. I think you can fold them in a piece of cardboard and put in an envelope. They are really not available around here. Once you get them I will email you my address, and if you don't mind I will pay you with paypal or send you a check. Thanks.

:yesnod:
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Old Sep 28, 2002 | 12:59 AM
  #5  
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Default Re: GM Screw size: 4.5M x 75 thread angle?????????? (Derf)

For the record thats 4.5mm x .75, not 75. The second number in metric screws is the pitch (thread to thread).
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