What do you call a 3D annulus/cylindrical shell and parts of it?

Question

Take a cylinder and punch a centered circular hole through it--like a washer. What is that shape called? In 2D it's an annulus, but what's the name of its 3D equivalent?

Also, what is this shape called when you remove part of it along 2 radii?

Answer 1

Coaxial or annular cylinder.

In a sphere it's a spherical ring. If the remainder of the cutout is round it's a donut or toroid but Wikipedia shows a square toroid too. English.SE has a dozen answers, depending on usage.

Answer 2

Nothing hard and fast, depends on local industry usage or custom.

Some suggestions

First image

Thick cylinder

Thick hollow cylinder

Flat Ring Blank

Second image

Prismatic punched sector

Thick Prismatic annular sector

Thick punched sector