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. ◀◀ ◀ ▶ ▶▶ O-Ring: 30 mm Nominal Inside Dia., 33 mm Nominal Outside Dia., 33 mm Actual Outside Dia., 100 PK O-Ring: 12.5 mm Nominal Inside Dia., 14.5 mm Nominal Outside Dia., 75 Shore A, Black, 25 PK O-Ring: 102 mm Nominal Inside Dia., 109 mm Nominal Outside Dia., 109 mm Actual Outside Dia., 2 PK O-Ring: 335, 2 3/4 in Nominal Inside Dia., 3 1/8 in Nominal Outside Dia., 50 Shore A, Black, 5 PK O-Ring: 18 mm Nominal Inside Dia., 28 mm Nominal Outside Dia., 28 mm Actual Outside Dia., Red, 2 PK O-Ring: 55 mm Nominal Inside Dia., 60 mm Nominal Outside Dia., 60 mm Actual Outside Dia., 2 PK O-Ring: 15 mm Nominal Inside Dia., 20 mm Nominal Outside Dia., 20 mm Actual Outside Dia., 25 PK O-Ring: 177, 9 1/2 in Nominal Inside Dia., 9 11/16 in Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 143 mm Nominal Inside Dia., 149 mm Nominal Outside Dia., 149 mm Actual Outside Dia., 5 PK O-Ring: 238, 3 1/2 in Nominal Inside Dia., 3 3/4 in Nominal Outside Dia., 75 Shore A, Black O-Ring: 121, 1 1/16 in Nominal Inside Dia., 1 1/4 in Nominal Outside Dia., 90 Shore A Backup Ring, Contoured: Buna N, For 154, 0.053 in Thick, 0.129 in Radius, 10 PK O-Ring: 20 mm Nominal Inside Dia., 24 mm Nominal Outside Dia., 24 mm Actual Outside Dia., Std, 50 PK O-Ring: 135 mm Nominal Inside Dia., 145 mm Nominal Outside Dia., 145 mm Actual Outside Dia., 5 PK O-Ring: 15 mm Nominal Inside Dia., 25 mm Nominal Outside Dia., 25 mm Actual Outside Dia., 25 PK Backup Ring, Contoured: Buna N, For 134, 0.053 in Thick, 0.129 in Radius, 100 PK O-Ring: 018, 3/4 in Nominal Inside Dia., 7/8 in Nominal Outside Dia., 75 Shore A, Black, Inch, 10 PK O-Ring: 337, 3 in Nominal Inside Dia., 3 3/8 in Nominal Outside Dia., 3.395 in Actual Outside Dia. O-Ring: 106, 3/16 in Nominal Inside Dia., 3/8 in Nominal Outside Dia., 80 Shore A, Black, 25 PK O-Ring: 011, 5/16 in Nominal Inside Dia., 7/16 in Nominal Outside Dia., 70 Shore A, Blue, Inch, 5 PK ◀◀ ◀ ▶ ▶▶
