1/8 THK KLNGR C4401, 1.000" 0.125" THK

The 13850RF125B0100FC is a green Klingersil C-4401 Class 300 ring face Flange Gasket built to a 1 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.

It resists elevated flange loads, hydrocarbons, and a broad range of process chemicals. That behavior comes from the compound itself: Klingersil C-4401 is known for clean release and easy removal at teardown, consistent thickness and density across the sheet. It should not be specified for service in service beyond the published pressure-temperature envelope or strong oxidizing acids in some grades.

It sees regular use in power generation, steam and hot water systems, and refining.

13850RF125B0100FC ships individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.