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: 130, 1 5/8 in Nominal Inside Dia., 1 13/16 in Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 019, 13/16 in Nominal Inside Dia., 15/16 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 13.3 mm Nominal Inside Dia., 18.1 mm Nominal Outside Dia., 75 Shore A, Black, 25 PK O-Ring: 252, 5 1/4 in Nominal Inside Dia., 5 1/2 in Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 199.3 mm Nominal Inside Dia., 210.7 mm Nominal Outside Dia., 70 Shore A, Black, 2 PK O-Ring: 031, 1 3/4 in Nominal Inside Dia., 1 7/8 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 227, 2 1/8 in Nominal Inside Dia., 2 3/8 in Nominal Outside Dia., 50 Shore A, Black, 10 PK O-Ring: 376, 9 3/4 in Nominal Inside Dia., 10 1/8 in Nominal Outside Dia., 90 Shore A, Black, Inch O-Ring: 441, 7 in Nominal Inside Dia., 7 1/2 in Nominal Outside Dia., 70 Shore A, Black, 2 PK O-Ring: 56 mm Nominal Inside Dia., 62 mm Nominal Outside Dia., 62 mm Actual Outside Dia., 5 PK O-Ring: 471, 22 in Nominal Inside Dia., 22 1/2 in Nominal Outside Dia., 90 Shore A, Black, Inch O-Ring: 004, 5/64 in Nominal Inside Dia., 13/64 in Nominal Outside Dia., 55 Shore D, White, 25 PK O-Ring: 13.4 mm Nominal Inside Dia., 17.2 mm Nominal Outside Dia., 70 Shore A, Green, 25 PK O-Ring: 015, 9/16 in Nominal Inside Dia., 11/16 in Nominal Outside Dia., 70 Shore A, Natural, 5 PK O-Ring: 12.5 mm Nominal Inside Dia., 16.5 mm Nominal Outside Dia., 75 Shore A, Black, 25 PK O-Ring: 15.6 mm Nominal Inside Dia., 19.1 mm Nominal Outside Dia., 70 Shore A, Green, 50 PK O-Ring: 5 mm Nominal Inside Dia., 8 mm Nominal Outside Dia., 8 mm Actual Outside Dia., Black, 10 PK O-Ring: 021, 15/16 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 134, 1 7/8 in Nominal Inside Dia., 2 1/16 in Nominal Outside Dia., 70 Shore A, Natural, 2 PK O-Ring: 211, 13/16 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 70 Shore A, Black, 10 PK ◀◀ ◀ ▶ ▶▶