The ornamental design for a nameplatefastener, as shown and described.
1. Name plate fastener
1.1: is a top plan view of a name plate fastener showing our new design;
1.2: is a bottom plan view thereof;
1.3: is a front elevation view thereof;
1.4: is a right side elevation view thereof;
1.5: is a cross-sectional view thereof;
1.6: is an exploded cross-sectional view thereof prior to its fastening to an exemplary name plate;
1.7: is a cross-sectional view thereof when fastened into an exemplary name plate; and
1.8: is a perspective view thereof when fastened into an exemplary name plate.
The broken line showings of the name plate, surrounding surfaces, and driving tool head are provided for the purpose of illustrating environmental structure and form no part of the claimed design.