Sealpro stocks gauge glass washers in a multitude of sizes for whatever the application requires. Sold singly or in packs of 12. Common washer materials carried (other materials are available on request):

EW-761 Molded EPDM RubberMolded EPDM (-65° to 350°)

EW-761 – 5/8" x 7/8" x 3/8"
EW-762 – 3/4" x 15/16" x 5/16"

(Other sizes available)

MW-303 Marvel WashersMarvel Washers

MW-303 – Marvel #3 (5/8" x 7/8")
MW-707 – Marvel #7 (3/4" x 1-1/4")

(Most Marvel sizes stocked)

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GW-578 Graphite Impregnated WashersGrafoil Washers (Up to 800°)

GW-578 – 5/8" x 7/8" x 3/8"
GW-763 – 3/4" x 1-1/4"

(Other sizes available)

Observation Sight GlassOBS-xxx Clear Sight Glass


Round peep sight glass in a variety of widths and thicknesses.  
Clear and tinted glass available.

Brass Friction Rings (Up to 800°)

Brass Friction Rings

BR-058 – 5/8" 
BR-075 – 3/4" 
BR-316 – 1-3/16"

Standard sizes are 5/8"x 7/8" and 3/4" x 15/16".  
Other combinations are available.  
Sold singly or in packs of 12.

GB-770-780 Butler Bevel Gauge Glass SealButler Bevel Gauge Glass Seal
Selected sizes available

GB-770 – 3/4"
GB-780 - 5/8"

Made from TEFLON®. A premium gasket for steam/water service. Prevents cloudiness and erosion of OD gauge glass due to steam leakage bypassing top seal. Four pieces per package.