The W Series tapered caps and plugs with wide flanges feature a wider flange than standard tapered caps. These parts offer added protection for bearing surfaces and cannot be accidentally pushed all the way into or through an opening when used as a plug. The caps/plugs cover a vast range of cap or plug applications. Easy to install and remove.:: a: 1.735, b: 1.900, C: 1.673, D: 1.838, E: 0.72, F: 2.22.