CID A-A-52444B涵盖三种组合垫圈，由金属和非石棉饰面材料组合而成。这些组合垫片用于汽车发动机应用中，它们将受到气缸盖和排气歧管等高温的影响。组合垫片在本文中称为“垫片”。

CID A-A-52444B covers three types of combination gaskets made from a combination of metal and nonasbestos facing material. These combination gaskets are used in automotive vehicle engine applications where they will be subjected to high temperatures as in cylinder heads and exhaust manifolds. The combination gaskets are referred to herein as "gaskets".