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.

2019 Holiday Shutdown
We will be closed for the Holidays from Dec. 23rd through the 27th and on Jan. 1st. Merry Christmas and Happy New Year!
European Microwave Week 2019
Stop by booth E001e and speak with our sales rep Radar Systems Technology. We will have sales samples and literature on display with RST Inc.
.006Ø Feedthrough
We unveiled our new capabilities in producing a .006Ø feedthrough at IMS in Boston. These feedthroughs for microwave applications operate at up to 90 GHz. Contact us for a quote.
503 Harrington Street • P.O. Box 720 • Seaford, DE 19973 • (302) 629-0324 • Fax (302) 629-0325