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APM HEXSEAL® is an internationally recognized brand name; known for inventing two important environmental sealing categories; switch and circuit breaker elastomeric sealing boot (covers), and self-sealing "Dry" embedded O-Ring fasteners and washers. APM holds over 100 patents (the newest, the IQ1030 toggle switch sealing boot which features a round base and simple, quick installation capability). These sealing boots which were developed in the late 1940's for the U.S. military in order to protect and prolong the operational life (100,000+ actuations) of sensitive controls that operate in extremely harsh environments throughout the world. All meet MIL-DTL-5423 specifications, are IP66/68 ingress rated and are a UL Recognized Component. Today there are over 5,000 HEXSEAL part numbers matching most popular switch, potentiometer and circuit breakers. Over 50 million HEXSEALS have been installed throughout the world by more than 200,000 OEM and MROs. This puts APM in a class by themselves. Many are stocked here at Relay Specialties for immediate shipment.


The APM Fastening Sealing Division manufactures an extensive line of stainless steel, self-sealing screws, bolts, rivets, nuts and self-sealing high-pressure washers that are used extensively in a wide range of applications where gas or liquids are under pressure (vacuum) up to 20,000psi. Unlike liquid sealants, these "dry" self-sealing fasteners can be reused many times, making them ideal for field servicing. Because no chemicals are used, there is no concern about employees breathing sealant- vapors during component assembly and, therefore, no environmental disposal problems.