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: 007, 5/32 in Nominal Inside Dia., 9/32 in Nominal Outside Dia., 60 Shore A, White, 25 PK O-Ring: 160, 5 1/4 in Nominal Inside Dia., 5 7/16 in Nominal Outside Dia., 70 Shore A, Red, 10 PK O-Ring: 334, 2 5/8 in Nominal Inside Dia., 3 in Nominal Outside Dia., 3.02 in Actual Outside Dia. O-Ring: 906, 7/15 in Nominal Inside Dia., 3/8 in Nominal Outside Dia., 70 Shore A, Red, 50 PK O-Ring: 211, 13/16 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 109, 5/16 in Nominal Inside Dia., 1/2 in Nominal Outside Dia., 70 Shore A, Black, FDA, 25 PK O-Ring: 13 mm Nominal Inside Dia., 16 mm Nominal Outside Dia., 16 mm Actual Outside Dia., Std, 50 PK O-Ring: 99 mm Nominal Inside Dia., 105 mm Nominal Outside Dia., 105 mm Actual Outside Dia., 10 PK O-Ring: 050, 5 1/4 in Nominal Inside Dia., 5 3/8 in Nominal Outside Dia., 70 Shore A, Black, 2 PK O-Ring: 45.8 mm Nominal Inside Dia., 49.4 mm Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 210, 3/4 in Nominal Inside Dia., 1 in Nominal Outside Dia., 1.012 in Actual Outside Dia. O-Ring: 35.5 mm Nominal Inside Dia., 40.5 mm Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 35 mm Nominal Inside Dia., 41 mm Nominal Outside Dia., 41 mm Actual Outside Dia., 10 PK O-Ring: 232, 2 3/4 in Nominal Inside Dia., 3 in Nominal Outside Dia., 70 Shore A, Black, Inch, 25 PK O-Ring: 918, 1 23/64 in Nominal Inside Dia., 1 19/32 in Nominal Outside Dia., 70 Shore A, 60 PK O-Ring: 373, 9 in Nominal Inside Dia., 9 3/8 in Nominal Outside Dia., 90 Shore A, Black, Inch, 2 PK O-Ring: 127, 1 7/16 in Nominal Inside Dia., 1 5/8 in Nominal Outside Dia., 75 Shore A, Brown, 25 PK O-Ring: 112, 1/2 in Nominal Inside Dia., 11/16 in Nominal Outside Dia., 70 Shore A, Black, 100 PK O-Ring: 048, 4 3/4 in Nominal Inside Dia., 4 7/8 in Nominal Outside Dia., 70 Shore A, Black, 2 PK O-Ring: 50 mm Nominal Inside Dia., 56 mm Nominal Outside Dia., 56 mm Actual Outside Dia., 10 PK ◀◀ ◀ ▶ ▶▶