Flat Header Plug Gaskets
The traditional way to seal header plugs in Fin-Fan® and air-cooled heat exchangers. A simple flat gasket under each plug prevents leaks and improves the seal. We make them in any material, any size, and with any coating you need.
Get a Quote or Order
Call (800) 456-8721 or send us these details and we'll respond the same business day.
- Tube OD or product number (see the sizing chart)
- Material and coating
- Header plugs needed, if any
- Quantity and date needed
| Specification | Details |
|---|---|
| Type | Flat header plug gasket |
| Application | Fin-Fan® / air-cooled heat exchanger header plugs |
| Tube ODs | 5/8" through 2" |
| Thickness | 0.0625" |
| Materials | Any material (specialty coatings available) |
| Compatibility | Works with existing header plugs |
| Annealing | Material is annealed before stamping |
| Custom Options | Any size, thickness, or material |
| Minimum Order | None (price breaks on larger quantities) |
| Delivery | Same-day shipping on in-stock sizes |
The Traditional Header Seal
Flat Gasket Sizes
| Flat Gasket (in.) | Matching Header Plug (in.) | Product # | |||||
|---|---|---|---|---|---|---|---|
| Tube O.D. | Gasket I.D. | Gasket O.D. | Thickness | Plug Thread O.D. | UNF Thread | Hex Size | |
Fin-Fan® is a registered trademark of Hudson Products Corporation.
EZ Torque® Header Plug Gaskets
Our EZ Torque® gasket seals with less than half the installation torque of a flat gasket. A serrated metal core with bonded graphite on each face seals against surface imperfections, so you avoid costly remachining and pass leak tests faster.
"I can vouch for these gaskets. Since we started using these over the OEM, we have not had a start up leak on our fin fan exchangers."
M. Ferguson
Cut Delivery From Weeks to Days
Need one gasket tomorrow or a full turnaround's worth? In-stock sizes ship the same day.
Flat Gasket FAQ
What is the minimum quantity I can order?
There's no minimum. Sometimes you need one gasket there tomorrow, and we're here to help. We offer price breaks on larger quantities.
Can you supply the header plugs for these gaskets?
Yes. We make our gaskets and header plugs in-house and can fill any size order for both.
Are your gaskets annealed after stamping?
No. The material is annealed before the gasket is stamped out.
I need a size that isn't listed. What should I do?
Call us. We're a custom machine shop as well as a manufacturer, and we can make gaskets to any custom specification.
Can I get a different thickness or material?
Yes. Because we're the manufacturer, we can customize your gaskets to the exact specs you need without adding much lead time.
Why Choose USA Industries
From pipe blinds to heat exchanger tools, we deliver custom-engineered products with the fastest turnaround times in the industry.
Fastest Turnaround
Available 24/7 - 365 days a year with same-day shipping available on stock items. Custom orders in days, not weeks.
Direct Pricing
No middlemen markup. Buy direct from the manufacturer with 40+ years of industry excellence and save.
Custom Engineering
Custom solutions designed to your exact specifications.
ISO Certified Quality
A quality driven ISO 9001:2015 certified manufacturer ensures consistent excellence.
BBB A+ Rated
The highest grade awarded, signifying USAI operates with high integrity and a strong commitment to resolving customer issues.