Flat Gaskets

  • Cut to size
  • Standard OD/ID Tolerances ±0.030”
  • Tighter tolerances available upon request
Max. Temperature
553Graphite-Flexible (SLS)GreyGraphite mechanically bonded to a .05" stainless steel insertDIN-DVGW, Fire-Safe acc. to DIN EN ISO 10497, BAM-tested-328°F (-200°C)842°F (450°C)1/16, 1/8
558FluoroelastomerBlack66% Fluorine commercial grade fluoroelastomer(75 duro)--20°F (-28°C)400°F (204°C)1/16, 1/8
560SiliconeRedCommercial grade silicone (50 duro)--80°F (-62°C)450°F (232°C)1/16, 1/8
563Gylon® 3504BluePTFE with Aluminosilicate microspheresABS, FDA, USP-450°F (268°C)500°F (260°C)1/16
566Gylon® 3545WhiteMicrocellular PTFEABS, FDA, 21CFR177.1550-450°F (268°C)500°F (260°C)1/16
567Soft-Chem® (PTFE)WhiteExpanded 100% virgin PTFEBAM-tested, DIN-DVGW, TA-Luft, FDA-400°F (-240°C)500°F (260°C)1/16, 1/8
564NeopreneBlackSBR/Neoprene/Nitrile blend (60 duro)--30°F (-34°C)200°F (93°C)1/32, 1/16, 3/32, 1/8
565Buna-NBlackCommercial Nitrile(60 duro)--25°F (-31°C)220°F (104°C)1/16, 3/32, 1/8
577EPDMBlackCommercial ethylene propylene diene monomer rubber (60 duro)--40°F (-40°C)225°F (107°C)1/16, 1/8
583Klingersil® C-4401GreenAramid fiber reinforced with a nitrile binder-0°F (-17°C)750°F (398°C)1/32, 1/16, 1/8

ABS (American Bureau of Shipping)
FDA (Food and Drug Administration)
USDA (US Department of Agriculture)
USP (US Pharmacopeia)
*Reference specification data sheets for more details. Always verify chemical compatibility with resistant guides.

Gylon® is a registered trademark of Garlock Sealing Technologies® an EnPro Industries company
Soft-Chem is a registered trademark by Klinger Thermoseal

Mica Shields

  • Style 592 – Grade V4 005-0.010” Thick
  • Rated: 300-600 PSIG Saturated Steam
  • Cut to specified diameter from 1/2″ OD to 12” OD
  • Standard OD Tolerances ±0.062”
  • Please inquire other grades or thicknesses

FEP Shields

  • Style 597 – 0.020” Thick
  • Rated: 500°F
  • Standard OD Tolerances ±0.030”
  • Please inquire other thicknesses

Application Notes

  • Compatibility: Before ordering, verify that the gaskets are compatible with the design, media(s), cleaning solutions, and the environment of the application and future applications. The John C. Ernst Co. does not make compatibility recommendations. Compatibility determinations, corrosion or otherwise, are the responsibility of the user.

Warning WARNING: This product can expose you to certain chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov

Model Number Matrix
Model Number Matrix