Solid Contoured Backup Ring 8.500" x 8.687" x 0.053" - Nitrile Nominal Width:0.093" we have never seen one

we have never seen one plug up

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Solid Contoured Backup Ring 8.500" x 8.687" x 0.053" - Nitrile Nominal Width:0.093" we have never seen oneProduct Details : Solid Contoured Backup Ring 8. 500" x 8. 687" x 0. 053" Nitrile Part No: 8 173 N90 Product Category: O Rings Product Type: Solid Contoured Backup Ring Series: 8 XXX Dash No.: 173 Material(s): Nitrile Material Code: NBR Durometer: 90 Temperature Range: 40F to +250F ( 40C to +121C) System Of Measurement: Inch Dimensions: 8. 500" x 8. 687" x 0. 053" Nominal I. D. (d) : 8. 500" Nominal O. D. (D) : 8. 687" Nominal Width (W): 0. 093" R: 0.