Subheading 741533 explicitly covers threaded screws, bolts, and nuts of copper, including articles of iron or steel with copper heads. The copper head is the determining feature, so these mixed-material fasteners remain within 7415 rather than being classified with steel fasteners.

No. The heading text specifically excludes staples for office or similar use. Office staples are classified elsewhere regardless of their copper content. Only staples used in construction, upholstery, or similar non-office applications fall within 741510.