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: 325, 1 1/2 in Nominal Inside Dia., 1 7/8 in Nominal Outside Dia., 90 Shore A, Black, 5 PK O-Ring: 036, 2 3/8 in Nominal Inside Dia., 2 1/2 in Nominal Outside Dia., 75 Shore A, Brown, 10 PK O-Ring: 72 mm Nominal Inside Dia., 78 mm Nominal Outside Dia., 78 mm Actual Outside Dia., 5 PK O-Ring: 83 mm Nominal Inside Dia., 91 mm Nominal Outside Dia., 91 mm Actual Outside Dia., 10 PK O-Ring: 342, 3 5/8 in Nominal Inside Dia., 4 in Nominal Outside Dia., 70 Shore A, Red, 25 PK O-Ring: 14 mm Nominal Inside Dia., 20 mm Nominal Outside Dia., 20 mm Actual Outside Dia., Std, 25 PK O-Ring: 009, 7/32 in Nominal Inside Dia., 11/32 in Nominal Outside Dia., 70 Shore A, Red, 25,000 PK O-Ring: 216, 1 1/8 in Nominal Inside Dia., 1 3/8 in Nominal Outside Dia., 90 Shore A, Black, 10 PK O-Ring: 62 mm Nominal Inside Dia., 74 mm Nominal Outside Dia., 74 mm Actual Outside Dia., 2 PK O-Ring: 62 mm Nominal Inside Dia., 66 mm Nominal Outside Dia., 66 mm Actual Outside Dia., Std, 25 PK O-Ring: 219, 1 5/16 in Nominal Inside Dia., 1 9/16 in Nominal Outside Dia., 55 Shore D, White, 10 PK O-Ring: 113, 9/16 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 60 Shore A, White, 10 PK O-Ring: 128 mm Nominal Inside Dia., 132 mm Nominal Outside Dia., 132 mm Actual Outside Dia., 5 PK O-Ring: 5.5 mm Nominal Inside Dia., 11.5 mm Nominal Outside Dia., 11.5 mm Actual Outside Dia., 50 PK O-Ring: 012, 3/8 in Nominal Inside Dia., 1/2 in Nominal Outside Dia., 70 Shore A, Black, Std, 100 PK O-Ring: 101.6 mm Nominal Inside Dia., 113 mm Nominal Outside Dia., 113 mm Actual Outside Dia., 2 PK O-Ring: 010, 1/4 in Nominal Inside Dia., 3/8 in Nominal Outside Dia., 55 Shore D, White, 50 PK O-Ring: 013, 7/16 in Nominal Inside Dia., 9/16 in Nominal Outside Dia., 70 Shore A, Black, X, 100 PK Backup Ring: Hytrel, For 15, 0.045 in Thick, Black, 50 PK O-Ring: 179.3 mm Nominal Inside Dia., 190.7 mm Nominal Outside Dia., 70 Shore A, Black, 2 PK ◀◀ ◀ ▶ ▶▶