Sanitary washer having peripheral annular rebate on upper and lower faces filled with flexible medium

摘要

A washer for avoiding unsanitary crevices under bolt heads and nuts, particularly for use in food handling equipment, is disclosed. The washer includes a metal disc(11) with annular rebates to the outer periphery of upper and lower surfaces, and a unitary formation of a flexible medium (10) filling each rebate and surrounding the outer periphery of the disc. The filling of each rebate is to a depth beyond the depth of the rebate to ensure that when the washer is loaded between parallel surfaces the filling is compressed to ensure a seal devoid of outside peripheral crevices.