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3/8" Umbrella Seals Nylon w/ Viton Grommet, Small OD Universal & SBC w/ 3/8" Stem Valves

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Product Description

Small OD 3/8" Umbrella Seals, Black Nylon w/ Viton Grommet


SB Chevy engines w/ 3/8" stem exhaust valves & small OD universal

Package of 8 seals.


These seals are manufactured from Black Nylon with a Viton grommet.

The grommet was added to improve the seal between the nylon body and valve stem and to make them much easier to install.

This type of seal was used by GM on their heavy duty SBC truck engines which ran 3/8" stem exhaust valves.

Grommented Nylon seals were GM's final and best umbrella seal design.

Can also be used as an universal umbrella seal providing adequate clearances exist.


     Specification Data:

  • Fits: 3/8" Valve Stems.
  • Inside Diameter, smallest point: .625”
  • Inside Diameter, widest point: .635"
  • Outside Diameter: .715"
  • Height: .450” Tall
  • Seal Material: Poly Acrylic w/ Viton Grommet
  • Material Temp Rating: 375F
  • Seal Type: Umbrella
  • Number of seals included in purchase: Eight
  • Valve seal protector sleeve included? No




Also available in a low cost all nylon. Check our other 3/8" umbrella seal listings or write.