Wavy staples in subfloor?

[Sadie08]

We are replacing some sections of subfloor and the old subfloor had these wavy staple type things helping keep the joints of the subfloor together. They are hammered down in there flush with the floor. I don't know what they are called so I'm having a hard time finding them online. The hardware store only had a metal plate with "teeth" in the bottom but it wouldn't be flush. Anyone know what these are called and/or where I can order them from? Thanks!!

[Excella CM]

They're called corrugated fasteners or pull-tight staples: Some other non PC names too.


McMaster-Carr

[markdoane]

You might have trouble finding the exact length you need.

They don't really add any shear resistance to the floor seams so you can leave them out. They help hold the plywood together during construction, but once you screw the floor to the crossmembers they are no longer necessary.

Here is a previous thread.

[Wabbiteer]

The fasteners are actually be a long term benefit - since the flex force diagonally from farthest corners are inserting shear forces along the common seam; even minute differentiation between the two with random binding or friction points will eventually soften the crushed clamp area and/or enlarge the bore hole in the wood and/or oblong the threaded lug area in the spar - outriggers...

Those movements are mostly when trailer is in motion but heat/cooling contractions will still be pulling and pushing - for a 40-year design lifetime the corrugated fasteners are cheap insurance.

[Sadie08]

Thanks for the replies! I actually got lucky and spotted them myself at Home Depot a half hour after I posted this Boy they are not the easiest things to hammer in, but we're getting there!