Little did I know

[headhunter636]

Well, I've always known that a 2x4 was not actually 2"x4" and I've known that a 1 X 6 X 2, was not actually 1" X 6", but I guess I did not know that a 1/4 inch piece of birch plywood was not actually 1/4 inch.

I always thought that plywood was measured exactly, but now I know.

[vaking]

Most plywood is not made in USA and actually has metric thickness. Most 1/4" ply is actually 5.2 mm thick rather than 6.35mm, 1/2" ply is 12mm and 3/4" ply is 18mm. That is why they sell "undersized router bits for plywood" to cut groves that provide better fit than standard bits.

[Mr__Bill]

Most plywood is not made in USA and actually has metric thickness. Most 1/4" ply is actually 5.2 mm thick rather than 6.35mm, 1/2" ply is 12mm and 3/4" ply is 18mm. That is why they sell "undersized router bits for plywood" to cut groves that provide better fit than standard bits.

The 1/4" I have gotten lately was not even 5.2mm, I think it may have been before it was pressed. The undersized bits that I have are really useless as they are either too big or small for whatever I can get locally.

and speaking of size a joke:
It's their wedding night and the bride is standing at the foot of the bed looking at the new groom saying "I should have known, what with you being a fisherman!"

I think plywood manufactures wives think the same thing

Bill,

[cabinetman]

Some plywood distributors carry full thickness stock. There are domestic brands of hardwood plywood that have an 'A' face veneer of .0625 (1/16"). If you buy plywood at a home center, the sheets could vary in overall and face veneer thickness.

If similarity and matching is necessary, some distributors can carry sequenced, and bookmatched and sequenced sheets.
.

[Leatherneck]

Bill...true and hilarious!! Thanks for the laugh!

The 1/4" I have gotten lately was not even 5.2mm, I think it may have been before it was pressed. The undersized bits that I have are really useless as they are either too big or small for whatever I can get locally.

and speaking of size a joke:
It's their wedding night and the bride is standing at the foot of the bed looking at the new groom saying "I should have known, what with you being a fisherman!"

I think plywood manufactures wives think the same thing

Bill,