Re: The Duchess Project: 1940 Super 8 Convertible Sedan
Posted by Joe Santana On 2018/1/15 17:03:10
Here's a much larger file of the stud we removed. You can zoom in and see the threads are rolled and they stick out from the shank. This is the style of stud I'm buying. Bruce Blevins does not offer a #403255, but the studs he does offer (#341119) meet the description of the newer studs.
Here's what Bruce wrote: "THE STUD HAS ROLLED THREADS WHICH ARE CORRECT FOR A PROPER STUD. AS TO WHEN THE STUD WAS MADE I CANNOT TELL. IT APPEARS TO HAVE A ROUNDED TOP, WHICH PACKARD DID TO IDENTIFY WHICH END OF THE STUD TO PUT INTO THE BLOCK. THE ROUNDED END STICKS OUT. ON A CORRECT STUD THE PITCH DIAMETER OF THE THREAD GOING INTO THE BLOCK IS OVERSIZE BY ABOUT .005 INCHES. PITCH DIAMETER IS THE THEORETICAL DIAMETER HALFWAY BETWEEN THE TOP AND BOTTOM OF THE THREAD. THIS IS TO MAKE THE STUD GO IN TIGHT AND NOT LEAK. HEAD STUDS SHOULD GO IN TIGHT. IF YOURS DO NOT, THEN EITHER THE STUD IS WRONG OR THE THREADS IN YOUR BLOCK ARE WORN OUT AND MAY HAVE TO HAVE INSERTS INSTALLED. I DO NOT BELIEVE PACKARD EVER USED SEALANT ON THEIR STUDS.
AGAIN IT IS BEST IF YOU GIVE ME THE PART NUMBER FOR YOUR STUDS. I USE THE ORIGINAL PACKARD PART NUMBERS IN MY CATALOG, WHICH I ATTACHED. MY STUDS ARE HARDENED AND DOUBLE BLACK OXOIDED. I ALSO ROLL MY THREADS LIKE PACKARD DID AND THE BLOCK THREAD IS OVERSIZE PER THE PACKARD BLUEPRINT. MY WASHERS AND NUTS ARE STAINLESS STEEL. IF HAVE ACORN NUTS AND REGULAR HEX NUTS.
I am posting this while I check a later year, 1949-50, which might list the 403255 part.
Attach file:
(254.21 KB)
Here's what Bruce wrote: "THE STUD HAS ROLLED THREADS WHICH ARE CORRECT FOR A PROPER STUD. AS TO WHEN THE STUD WAS MADE I CANNOT TELL. IT APPEARS TO HAVE A ROUNDED TOP, WHICH PACKARD DID TO IDENTIFY WHICH END OF THE STUD TO PUT INTO THE BLOCK. THE ROUNDED END STICKS OUT. ON A CORRECT STUD THE PITCH DIAMETER OF THE THREAD GOING INTO THE BLOCK IS OVERSIZE BY ABOUT .005 INCHES. PITCH DIAMETER IS THE THEORETICAL DIAMETER HALFWAY BETWEEN THE TOP AND BOTTOM OF THE THREAD. THIS IS TO MAKE THE STUD GO IN TIGHT AND NOT LEAK. HEAD STUDS SHOULD GO IN TIGHT. IF YOURS DO NOT, THEN EITHER THE STUD IS WRONG OR THE THREADS IN YOUR BLOCK ARE WORN OUT AND MAY HAVE TO HAVE INSERTS INSTALLED. I DO NOT BELIEVE PACKARD EVER USED SEALANT ON THEIR STUDS.
AGAIN IT IS BEST IF YOU GIVE ME THE PART NUMBER FOR YOUR STUDS. I USE THE ORIGINAL PACKARD PART NUMBERS IN MY CATALOG, WHICH I ATTACHED. MY STUDS ARE HARDENED AND DOUBLE BLACK OXOIDED. I ALSO ROLL MY THREADS LIKE PACKARD DID AND THE BLOCK THREAD IS OVERSIZE PER THE PACKARD BLUEPRINT. MY WASHERS AND NUTS ARE STAINLESS STEEL. IF HAVE ACORN NUTS AND REGULAR HEX NUTS.
I am posting this while I check a later year, 1949-50, which might list the 403255 part.
Attach file:
(254.21 KB)
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