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: 8.5 mm Nominal Inside Dia., 13.5 mm Nominal Outside Dia., 13.5 mm Actual Outside Dia., 50 PK O-Ring: 9 mm Nominal Inside Dia., 14 mm Nominal Outside Dia., 14 mm Actual Outside Dia., 50 PK O-Ring: 007, 3/32 in Nominal Inside Dia., 9/32 in Nominal Outside Dia., 0.285 in Actual Outside Dia. O-Ring: 59.2 mm Nominal Inside Dia., 70.6 mm Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 14 mm Nominal Inside Dia., 17 mm Nominal Outside Dia., 17 mm Actual Outside Dia., X, 10 PK Backup Ring, Contoured: Buna N, For 147, 0.053 in Thick, 0.129 in Radius, 25 PK O-Ring: 47.7 mm Nominal Inside Dia., 54.7 mm Nominal Outside Dia., 54.7 mm Actual Outside Dia. O-Ring: 430, 5 1/8 in Nominal Inside Dia., 5 5/8 in Nominal Outside Dia., 70 Shore A, Black, 5 PK O-Ring: 113, 9/16 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 70 Shore A, Blue, 10 PK O-Ring: 20 mm Nominal Inside Dia., 26 mm Nominal Outside Dia., 26 mm Actual Outside Dia., 50 PK O-Ring: 64.5 mm Nominal Inside Dia., 70.5 mm Nominal Outside Dia., 70.5 mm Actual Outside Dia., 5 PK O-Ring: 210, 3/4 in Nominal Inside Dia., 1 in Nominal Outside Dia., 1.012 in Actual Outside Dia. O-Ring: 120, 1 in Nominal Inside Dia., 1 3/16 in Nominal Outside Dia., 75 Shore A, Black, Inch, 5 PK O-Ring: 010, 1/4 in Nominal Inside Dia., 3/8 in Nominal Outside Dia., 70 Shore A, Black, 25,000 PK O-Ring: 250, 5 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 90 Shore A, Black, 5 PK O-Ring: 428, 4 7/8 in Nominal Inside Dia., 5 3/8 in Nominal Outside Dia., 90 Shore A, Black, 2 PK O-Ring: 69 mm Nominal Inside Dia., 79 mm Nominal Outside Dia., 79 mm Actual Outside Dia., 75 Shore A O-Ring: 129, 1 9/16 in Nominal Inside Dia., 1 3/4 in Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 148, 2 3/4 in Nominal Inside Dia., 2 15/16 in Nominal Outside Dia., 90 Shore A, Black, 10 PK O-Ring: 387, 18 in Nominal Inside Dia., 18 3/8 in Nominal Outside Dia., 70 Shore A, Black, 5 PK ◀◀ ◀ ▶ ▶▶