grom·met 
(grŏmĭt) also grum·met (grŭm-)
(grŏmĭt) also grum·met (grŭm-)n.
1.
a. A reinforced eyelet, as in cloth or leather, through which a fastener may be passed.
b. A small metal or plastic ring used to reinforce such an eyelet.
2. Nautical A loop of rope or metal used for securing the edge of a sail to its stay.
[Probably from obsolete French gromette, gormette, chain joining the ends of a bit, from Old French, from gourmer, to bridle.]
grommet