Caplugs’ AS138 Series protective caps for circular electrical connectors are available in 26 sizes, with 27 more coming soon. The caps are tooled and engraved with the specification number, dash number, material code, and the Caplugs part number for easy identification; they do not reference any other specifications. The materials are represented by the following codes: A = LDPE (low-density polyethylene), color: per specification; B = electrostatic dissipative, color: black; C = conductive, color: black.