It looks like this Part has been superseded by LEGO Part 4275b Hinge Plate 1 x 2 with 3 Fingers and Hollow Studs.
Click on a colored part below to see the Sets and MOCs that use part 4275a Hinge Plate 1 x 2 with 3 Fingers and Solid Studs in that color. You can find an overview of all LEGO Colors here.
If a color is missing, it probably needs to be added to a Set Inventory.
There are 3 Mold variations of part 4275a - Hinge Plate 1 x 2 with 3 Fingers and Solid Studs in the database, in use between 1981 to 1986. See Molds and other related Parts.