Modern Fuel Cap O-rings!

[GAHco]

We offer these for the new and improved gas cap o-ring. It also is compatible with hydraulic fluid!

They do not de-grade like the old nitrile o-rings.

The M25998/3-225 Packing (O-ring) made from MIL-R-25988 Type 1, Class 1 Grade 60 Fluorosilicone

Durometer=60 and blue in color as required by the mil-spec. Oil and fuel Resistant - resistant to MIL-H-5606. Used for low-pressure applications - Hydraulic Fluid, Fuel, Air (-90 to 350F)

[brian]

apparently there are"old" and "new" caps. What are the OD, ID, and thickness dimensions of the o-rings you're selling?

Here are the approximate dimensions of one of my o-rings:

OD: 1.955"
ID: 1.541"
thickness: 0.207"

[Snowflake]

FYI - Here's an O-ring from McMaster Carr that matches your dimensions pretty closely:

http://www.mcmaster.com/#8333t348/=crktwv

OD: 1.895"
ID: 1.475"
Thk: 0.210"

The increased diameters on yours could be due to stretching over time, or approximate measuring, or both. $6 each, though.