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Standards & Organizations

SECO SEALS gaskets are manufactured to conform to ASME, ASTM, MIL-STD, and SAE standards. Below are external links to the respective organizations and internal links showing the specific standards that are utilized in the design and manufacture of our gaskets.


The American Society of Mechanical Engineers promotes the art, science and practice of multidisciplinary engineering and allied sciences around the globe.

Click below for the “ASME” standards pertaining to our gaskets.


ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.

Click below for the “ASTM” standards pertaining to our gaskets.


Military Standard (MIL-STD) refers to hardware specs outlined by the United States Department of Defense.

Click below for the “MIL” standards pertaining to our gaskets.

National Stock Number (NSN)

The NSN is derived from the Department of Defense Federal Stock Number (FSN) system that was in use from 1949 through 1974. It is officially recognized by the United States Government, the North Atlantic Treaty Organization (NATO) and many other Governments around the world.

SECO SEALS37-degree Conical Seals” and “24-degree flareless gaskets” have NSNs assigned to them. Click below for the “NSN to SECO SEALS Part Number Cross Reference” list.


SAE International, formerly named the Society of Automotive Engineers, is a United States-based, globally active professional association and standards developing organization for engineering professionals in various industries.

Click below for the “SAE International” standards pertaining to our gaskets.