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**71CHEVYSHORTBED402** · 08-28-2023, 03:19 PM

I wonder what the factory installed, at least most of the time? I found mine with stainless #2 phillips panhead screws, #10 x 1/2".

But on-line they show stainless #2 phillips countersunk screws, #8 x 3/8". Apparently some of the NOS sill packages included the same. Tried some #8 countersunk screws (two sets, two sources) - sure they work, but it doesn't strike me right, because the heads on countersunk screws should sit flush with a surface. The sills aren't made for them, IMO, because the screw heads aren't flush.

Perhaps just an observation. For what worth, my floor will take #8 even though it had #10. Sometimes I think old #10 are a pinch smaller than new

08-28-2023, 03:19 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,166	Door sill screws I wonder what the factory installed, at least most of the time? I found mine with stainless #2 phillips panhead screws, #10 x 1/2". But on-line they show stainless #2 phillips countersunk screws, #8 x 3/8". Apparently some of the NOS sill packages included the same. Tried some #8 countersunk screws (two sets, two sources) - sure they work, but it doesn't strike me right, because the heads on countersunk screws should sit flush with a surface. The sills aren't made for them, IMO, because the screw heads aren't flush. Perhaps just an observation. For what worth, my floor will take #8 even though it had #10. Sometimes I think old #10 are a pinch smaller than new Attached Images __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 08-28-2023 at 03:37 PM.