Where should the flat head screws go? (replace, drywall, difference)

[LoveAlbuquerque]

I took off all 6 screws from the chair seat in order to reupholster the chair. The attached photo shows the 6 holes from where the screws were taken, pointed by red arrows.

It turns out that the screws are not the same shape. They are four round heads and two flat heads. See the attached photo showing the screws.

I recall that two round heads are from the two holes at the front (the two holes to the right in the photo). But I don't remember which holes the remaining screws (two round, two flat) are from among the four holes to the left in the photo.

Does it matter if I put the flat head screws in the holes for round head screws, and vice versa?

[K'ledgeBldr]

Look at the bottom of the hole- if it's flat, the round head screws. If it's tapered (cone shape), the flat head screws.

Look at the screw heads- you'll see the difference!

[Nodpete]

Looks to me like somebody replaced 2 of the round head screws with drywall screws.

[LoveAlbuquerque]

Originally Posted by Nodpete

Looks to me like somebody replaced 2 of the round head screws with drywall screws.

Do you think all the screws should be round heads?

[Nodpete]

Don't think it matters, but to put them back in the holes that they were in, do what K"ledgeBldr said.

[K'ledgeBldr]

Originally Posted by Nodpete

Looks to me like somebody replaced 2 of the round head screws with drywall screws.

Those are “taper-head” screws. They are not “drywall” screws. Drywall screws have what is called a “trumpet head”.

[LoveAlbuquerque]

Originally Posted by K'ledgeBldr

Look at the bottom of the hole- if it's flat, the round head screws. If it's tapered (cone shape), the flat head screws.

Look at the screw heads- you'll see the difference!

Thanks for the suggestion. Seems that the flat heads fit into the holes on the back side (to the left in the photo), due to the cone shape inside those two holes.

However, they don't feel like perfect cones. Makes me wonder the wrong type of screws (flat heads) were used, per Nodpete's comment.

Makes sense to use the same type of round heads to replace the flat heads. Agree?

[K'ledgeBldr]

Sure; why not?

[NORTY FLATZ]

Some of those screws look like "counter-sunk" screws.

[LoveAlbuquerque]

Originally Posted by NORTY FLATZ

Some of those screws look like "counter-sunk" screws.

Correct. The heads of the screws were below the surface of the wood.