Abstract: A cylinder head gasket includes a metal gasket plate; a lubricant aperture provided in the plate for serving as a passage for a lubricant; a lubricant aperture seal surrounding the lubricant aperture and being of a lubricant-resistant material; a coolant aperture provided in the plate for serving as a passage for a coolant; a coolant aperture seal surrounding the coolant aperture and being of a coolant-resistant material; and a single coupling agent coating provided on the plate. The coupling agent coating is of a material which bonds the lubricant aperture seal and the coolant aperture seal to the plate.

Abstract: In a fastener comprising a screw with a shaft having a thread portion at one end and a head at the other end and an axially extending sleeve structure provided with an internal thread at its end adjacent the screw head in which the screw is captured wherein the screw shaft has a reduced diameter area between the screw head and the screw thread, which is disposed within the sleeve thread area after the screw has been threaded through the sleeve thread, the adjacent end areas of the sleeve thread and the screw thread are made inoperative by cold deformation so that the screw is captured in the sleeve structure.

Abstract: In a positive coupling structure for interconnecting a first element having a T-shaped projection with a neck and a head portion which extends from the neck portion in opposite directions and a second element which has a cut-out shaped corresponding to the T-shaped projection of the first element for snugly receiving the T-shaped projection, the opposite ends of the head portion are widened to form recesses in which the adjacent areas of the second element are firmly engaged.