Snap-fasteners and press-studs in 960610 close by pressure engagement between two interlocking components and do not require a buttonhole. Conventional buttons in 960621–960629 are passed through a buttonhole or loop to fasten. The mechanism of closure — pressure versus buttonhole — is the primary classification criterion.

No — button molds, parts of buttons, and button blanks are specifically classified under 960630, separate from finished buttons. A blank is an unfinished button that has not yet been given its final surface treatment or covering, and it is classified here rather than with the finished article it will become.