Century Seals is an ISO 9001:2015 Certified and ITAR Registered 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.

Don't See What You're Looking For? Let us build it for you! We offer custom solutions to help your company meet its goals. Email us at sales@centuryseals.com or call us to get started.


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

Labor Day Holiday Observance
Century Seals will be closed on Monday September 5, 2022 in observance of the Labor Day holiday.

We will re-open at 8:00 AM on Tuesday September 6.

We extend our thanks to all of our ... [READ MORE]
Upcoming Holiday Closures
Century Seals will be closed on Monday 4 July 2022 in observance Independence Day. We will reopen at 8:00 AM on Tuesday 5 July.

We sincerely thank all of our customers for their continued sup ... [READ MORE]
.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]
503 Harrington Street • P.O. Box 720 • Seaford, DE 19973 • (302) 629-0324 • Fax (302) 629-0325