Snaps
Alternative fasteners used if the main fabric is too thick to easily sew buttonholes.
Where it is used
Sewing Additional Fasteners
p. 23- Sew buttons according to the markings.

Buttons and Buttonholes
p. 22- Sew on the buttons and create the buttonholes, following the markings on the pattern. If your fabric is too thick for buttonholes, you can attach buttons to the right front panel just for decoration, and add snaps for actual fastening, making sure to place them according to the pattern markings.

Related terms
alternative toButtonholes
alternative toButtonholes