[Grammar] Can I say, "A piece of parts"

[Snappy]

The word "Parts (i.e., components of machines) " is usually used in plural.
Can I say, "a piece of parts" if I want to refer to a single component?

 

[bhaisahab]

The word "Parts (i.e., components of machines) " is usually used in plural.
Can I say, "a piece of parts" if I want to refer to a single component?

Use "a part".

 

[Snappy]

Use "a part".

Thanks. What about "a piece of apple"?
Should I say, "a piece of an apple"?

 

[bhaisahab]

Thanks. What about "a piece of apple"?
Should I say, "a piece of an apple"?

"A piece of apple" is fine.