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12in Full Face Flange Gasket — Red Rubber 150#/125#, 1/8in Thick, 19in OD

12in Full Face Flange Gasket — Red Rubber 150#/125#, 1/8in Thick, 19in OD

SKU: SH-FF-1200


Weight .25 lbs
Dimensions 21 × 21 × .5 in
Quantity Price Per Unit
1 - 2 $13.65
3 - 5 $11.60
6 - 9 $10.92
10 + $10.24
QTY Price

$13.65


Have a Question?
  • DESCRIPTION

    A 12 inch full face gasket in 1/8 in. red rubber, cut to ASME B16.21 for 150 lb flanges. Pipe size is a name, not a measurement — 12 in. pipe is 12-3/4 in. across the outside, which is why the bore reads 12-3/4 in. and the outer edge 19 in.

    Measure across your flange face — if it reads 19 in., this is your gasket.

    • Fits pipe size — 12 in. nominal
    • Outside diameter — 19 in. (matches the flange face)
    • Bolt holes — 12, at 1 in.
    • Bolt circle — 17 in.
    • Bore — 12-3/4 in.
    • Thickness — 1/8 in.
    • Material — red rubber (SBR), 70 Shore A, -20°F to 180°F
    • Flange class — 150 lb steel or 125 lb cast iron

    Fits 150 lb steel and 125 lb cast iron flanges — Class 125 and Class 150 share the same bolt pattern, so one gasket covers both. A Class 300 flange is wider on a different bolt circle and takes a different gasket. Red rubber (SBR) suits water, brine, air and low-pressure service; for oil, fuel, solvents or acids ask for Buna, Viton, EPDM or non-asbestos.

    Where a 12 in. goes. Municipal and industrial water mains, treatment plant and lift station discharge, fire service mains into buildings, cooling tower headers and large irrigation trunk lines. It carries the same twelve 1 in. bolts as the 10 in., but on a 17 in. bolt circle instead of 14-1/4 in. — so measure the circle, not just the hole count, if you are deciding between the two.

    Flanging up a whole pump?The suction flange is normally a size or two bigger than the discharge, so a 12in rarely goes in on its own.

    12in is the largest we hold as standard stock. Above that, or in a different thickness, oversize bore, Buna, Viton, EPDM or neoprene, we cut to print — call or text 561-414-1046 with your flange dimensions.

Disclaimer: Seal House USA provides aftermarket replacement parts. Any OEM names are used strictly for cross-reference. We are an independent supplier.