Correct screw for base of column seal retainer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Accelo** · 12-21-2021, 03:11 AM

I purchased two screws from LMC truck for the Column Seal Retainer. They were two small for the application.

The shank, outside diameter is .188 diameter. 16-tpi. Which would make it a #10 sheet metal screw.

It must take a #12 which is .216" in diameter. Any one have a picture of this screw and the length? I will attempt to source it locally.

**pjmoreland** · 12-21-2021, 05:03 AM

My truck has the original screws in this location. The threaded portion is 1/2" long, and the head takes a 5/16" socket. The thread minor diameter is .142" and major diameter is .188". The thread pitch is 16 TPI.

One of the screws that secure my fuse panel to the firewall wouldn't tighten up. I had my wife hold a heavy block of steel against one side of the firewall while I hit the other side of the hole with a hammer a few times to flatten the metal back out. The screw tightens up just fine now.

**Accelo** · 12-21-2021, 12:44 PM

pjmoreland:
Thank your for taking the time to collect this information for me.
Board is a great resource.

**pjmoreland** · 12-21-2021, 12:50 PM

My pleasure, and it gave me something to do while waiting to apply another coat of paint to to something I'm working on. This board sure is a great resource!

**71CHEVYSHORTBED402** · 12-22-2021, 12:19 AM

pjmoreland beat me to it.

Great idea how to tighten up a hole BTW, didn't know that.

12-21-2021, 05:03 AM	#2
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 6,008	Re: Correct screw for base of column seal retainer My truck has the original screws in this location. The threaded portion is 1/2" long, and the head takes a 5/16" socket. The thread minor diameter is .142" and major diameter is .188". The thread pitch is 16 TPI. One of the screws that secure my fuse panel to the firewall wouldn't tighten up. I had my wife hold a heavy block of steel against one side of the firewall while I hit the other side of the hole with a hammer a few times to flatten the metal back out. The screw tightens up just fine now. Attached Images Last edited by pjmoreland; 12-22-2021 at 12:22 AM.

12-21-2021, 12:44 PM	#3
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,301	Re: Correct screw for base of column seal retainer pjmoreland: Thank your for taking the time to collect this information for me. Board is a great resource.

12-21-2021, 12:50 PM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 6,008	Re: Correct screw for base of column seal retainer My pleasure, and it gave me something to do while waiting to apply another coat of paint to to something I'm working on. This board sure is a great resource!

12-22-2021, 12:19 AM	#5
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,329	Re: Correct screw for base of column seal retainer pjmoreland beat me to it. Great idea how to tighten up a hole BTW, didn't know that. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025

12-21-2021, 03:11 AM	#1
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,301	Correct screw for base of column seal retainer I purchased two screws from LMC truck for the Column Seal Retainer. They were two small for the application. The shank, outside diameter is .188 diameter. 16-tpi. Which would make it a #10 sheet metal screw. It must take a #12 which is .216" in diameter. Any one have a picture of this screw and the length? I will attempt to source it locally. Attached Images



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