Century Seals is an ISO 9001:2015 manufacturer of the highest quality hermetic glass to metal seals. With over 100 years of combined experience, we have the knowledge to serve you best.

Our Products: Miniature hermetic feedthroughs, Relay headers, DIP headers, TO packages, Machined Kovar packages for microwave applications, custom parts to meet specifications, and many others. See the products tab for pictures.  

Product Applications: Aerospace, Defense, Industrial, RF Microwave, Semiconductors, Telecommunications, Refrigeration, and a wide variety of specialty manufacturers.


Have we let you down or not met your expectations? Let us know via this customer complaint form.

.006Ø Feedthrough
New Product Alert! Century Seals is proud to introduce our new .006Ø feedthrough! These feedthroughs for microwave applications operate at up to 90 GHz. Click Doc ... [READ MORE]
Ceramic to Metal Seals
In addition to our offering of glass to metal seals, we also manufacture ceramic to metal feedthrough connectors. Click Documents & Downloads > Flyers above, or contact us for more information or a pr ... [READ MORE]
COVID-19 Company Response
Century Seals, Inc. offers our most sincere thanks to all individuals who are on the front lines fighting this pandemic. We currently supply many essential supply chains and have therefore remained op ... [READ MORE]
503 Harrington Street • P.O. Box 720 • Seaford, DE 19973 • (302) 629-0324 • Fax (302) 629-0325