Straight Up Kickass FKM Viton O Ring Seals Size 388 With 75 Shore A Hardness Heavy Duty Industrial Rubber Gaskets Pack Of Two Fifty Built To Outlast Any Wear And Tear On The Job Site

Large Industrial FKM Viton O Ring Seal Pack of 2

These oversized Viton O-ring seals tackle tough jobs where cheap rubber falls apart. Made from solid fluorocarbon, this 19 inch ID gasket resists fuels, acids, and oils even when boiling hot. You will see these handy in automotive race builds, aerospace hydraulic loops, and industrial plants running chemicals that eat softer materials. This pair keeps your equipment sealed tight without playing tricks.

✅ Size 388 dimensions measure 19 ID x 19-3/8 OD x 3/16 cross section ✅ Pack of 2 heavy duty FKM seals rated for 75 Shore A durometer ✅ Handle temperatures from -20°F to +400°F without losing shape ✅ Resistant to acids, ketones, hydrocarbons, fuels, and hydraulic fluids ✅ Meets AMS 7259 standard for low compression set and ozone durability ✅ Brown rubber compound prevents leaks in harsh industrial applications

💡 What limits the low-temperature flexibility of fluorocarbon compounds in dynamic seals?
Fluorocarbon compounds pack a punch against chemicals and heat, but their stiff polymer chains refuse to flex when temps dip, limiting how cold they can run without failing the job.
- Stick with this handy seal for static applications or warm zones above -20°F to keep the chemistry out without cracking the seal face.
- Swap to other elastomers like silicone or EPDM only if your gear runs cold, since FKM materials sacrifice cold bendability for serious acid and fuel toughness.

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