Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 3324bc01 Hinge Plate 2 x 9 with Hole in between 4 Studs this part is a alternate of it
• 3324cc01 Hinge Plate 2 x 9 with 2 Holes Alternate of this part
• 313 Hinge Plate 2 x 2 Pivot Sub-part of this part
• 314 Hinge Plate 2 x 5 Top Sub-part of this part
• 3324 Hinge Plate 2 x 9 Base Sub-part of this part