MIL-DTL-22529 Grommet, Edging \(S/S By Nasm22529\)This specification covers three types of edging grommets; a plastic caterpillar style applied with an adhesive, and two spring-style, stainless steel based composite grommets requiring no adhesives. Edging grommets are used to provide abrasion protection of electrical current carrying wires and cable bundles routed through metal structures.