NF L21-324*NF EN 2553:1993 Aerospace series. Rivets, solid, 100 degrees normal countersunk head with dome, in aluminium alloy 2017A, inch based series.
1993NF L21-324*NF EN 2553:1993 Aerospace series. Rivets, solid, 100 degrees normal countersunk head with dome, in aluminium alloy 2017A, inch based series.