O-Ring Buna N AS568 Dash Number 279 Actual Width 0.139 In. Actual Inside Dia 12.984 In. Outside Dia 13.262 In. Cross Section Shape Round Durometer Rating Medium Hard Durometer 90 Shore A Nominal Width 1/8 In. Nominal Inside Dia 13 In. Nominal Outside Dia 13-1/4 In. Color Black Temp Range -25 Degrees to 250 Degrees F Meets/Exceeds SAE J200 ASTM D2000 Package Quantity 5