Company Overview and History
APM Hexseal, established in 1947 by Milton Morse and Riva Solins Morse, has a long-standing history in developing and manufacturing environmental sealing solutions. The company holds the distinction of having designed and patented the first self-sealing fasteners, known as Seelskrews'® and Seelbolts'®. Throughout its history, APM Hexseal has contributed significantly to industry standards, notably assisting in the development of the MIL-B-5423 specification (now MIL-DTL-5423) based on its proven designs. With over 75 years of experience, the company maintains a strong commitment to quality, innovation, and manufacturing in America.
Products and Services
The company offers a comprehensive range of sealing solutions, including various types of sealing boots and bushing seals for electrical and electronic applications. These include toggle, pushbutton, rotary, circuit breaker, and rocker boots, as well as 'Illuma-boots' that glow in the dark for enhanced visibility. APM Hexseal also provides a full line of self-sealing hardware, such as Seelskrews'®, Seelbolts'®, Seelnuts'®, 'Nutzilla' (large self-sealing nuts), Seeloc'® Washers, and sealing socket head cap screws. These products are designed with integrated elastomeric seals, often silicone-based (like RUBRGLAS'), to prevent contamination from liquids, gases, and particulates. The company also offers custom elastomeric molding capabilities, allowing for tailored solutions from concept to production.
Quality, Compliance, and Applications
APM Hexseal's products are engineered for performance in challenging environments, with many components being UL recognized and compliant with standards such as NEMA 4/4X, 6, 6P, MIL-DTL-5423, RoHS, REACH, TSCA, and POPs. The manufacturing process adheres to ISO 9001:2015 quality management systems. The sealing solutions serve a diverse array of industries, including military, aerospace, medical, marine, construction, energy generation, food and beverage, agriculture, drilling, lighting, robotics, and heavy equipment. The 'Manufactured in America' ethos emphasizes benefits like quality control, shorter lead times, and environmental sustainability, ensuring reliable protection for mission-critical systems worldwide.







