GASKET, 60 DURO BUNA-N, 4.000" 300# FF

The 13726FF125B0400 is a black Buna-N (Nitrile) Class 300 full face Flange Gasket supplied with a 4 inch nominal pipe size, a Class 300 pressure rating, and a thickness of 0.125 inch. This flange gasket provides a replaceable sealing element at every flanged pipe connection. This item is further identified as NPS, 0.125 THK.

Buna-N (Nitrile) is specified here for low compression set under sustained load and most widely specified general-purpose sealing elastomer. This material stands up to many alcohols, propane and butane, and water. Applications involving ozone and direct sunlight or ketones call for a different compound.

Maintenance and OEM teams specify it across agricultural equipment, fluid power, and automotive.

This item is sold individually under part number 13726FF125B0400. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.