PERFECCIONAMIENTOS EN UNA COMBINACION DE CIERRE PARA RECI- PIENTES.

摘要

A closure bushing molded of synthetic plastic material has a cylindrical wall surrounded by a circumferential retaining shoulder and terminates at one end in a laterally extending octagonally shaped flange. The bushing wall is molded with an oversize pitch diameter internal straight pipe thread. Insertion of the bushing within a suitably sized container wall opening reduces the bushing wall interior to a standard pipe thread pitch diameter for reception of a threaded closure fitting.