Catalog Hardware O-Rings and O-Ring Kits O-rings and O-ring kits help ensure a tight seal to prevent air and fluid leaks in applications such as air conditioner repair or plumbing installations. ◀◀ ◀ ▶ ▶▶ Backup Ring, Contoured: Buna N, For 438, 0.117 in Thick, 0.344 in Radius, 10 PK O-Ring: 3.5 mm Nominal Inside Dia., 5.9 mm Nominal Outside Dia., 5.9 mm Actual Outside Dia., 50 PK O-Ring: 55 mm Nominal Inside Dia., 63 mm Nominal Outside Dia., 63 mm Actual Outside Dia., 20 PK O-Ring: 107, 3/16 in Nominal Inside Dia., 13/32 in Nominal Outside Dia., 80 Shore A, Black, 25 PK O-Ring: 127 mm Nominal Inside Dia., 133 mm Nominal Outside Dia., 133 mm Actual Outside Dia., 5 PK O-Ring: 425, 4 1/2 in Nominal Inside Dia., 5 in Nominal Outside Dia., 90 Shore A, Black, Inch, 2 PK O-Ring: 140 mm Nominal Inside Dia., 146 mm Nominal Outside Dia., 146 mm Actual Outside Dia., 5 PK O-Ring: 429, 5 in Nominal Inside Dia., 5 1/2 in Nominal Outside Dia., 70 Shore A, Red, 5 PK O-Ring: 82 mm Nominal Inside Dia., 88 mm Nominal Outside Dia., 88 mm Actual Outside Dia., 25 PK O-Ring: 459, 15 in Nominal Inside Dia., 15 1/2 in Nominal Outside Dia., 90 Shore A, Black, Inch O-Ring: 016, 3/8 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 70 Shore A, Blue, 10 PK O-Ring: 35.1 mm Nominal Inside Dia., 38.3 mm Nominal Outside Dia., 70 Shore A, Black, Metric, 25 PK O-Ring: 17 mm Nominal Inside Dia., 27 mm Nominal Outside Dia., 27 mm Actual Outside Dia., 25 PK O-Ring: 95 mm Nominal Inside Dia., 103 mm Nominal Outside Dia., 103 mm Actual Outside Dia., 10 PK O-Ring: 113, 9/16 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 0.755 in Actual Outside Dia. O-Ring: 100 mm Nominal Inside Dia., 110 mm Nominal Outside Dia., 110 mm Actual Outside Dia., Black O-Ring: 230, 2 1/2 in Nominal Inside Dia., 2 3/4 in Nominal Outside Dia., 70 Shore A, Red, 25 PK O-Ring: 189.5 mm Nominal Inside Dia., 206.3 mm Nominal Outside Dia., 70 Shore A, Black, 2 PK O-Ring: 144, 2 1/2 in Nominal Inside Dia., 2 11/16 in Nominal Outside Dia., 80 Shore A, Black, 5 PK O-Ring: 28 mm Nominal Inside Dia., 36 mm Nominal Outside Dia., 36 mm Actual Outside Dia., 75 Shore A ◀◀ ◀ ▶ ▶▶
