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: 180 mm Nominal Inside Dia., 187 mm Nominal Outside Dia., 187 mm Actual Outside Dia., 2 PK O-Ring: 010, 1/4 in Nominal Inside Dia., 3/8 in Nominal Outside Dia., 70 Shore A, Natural, 10 PK O-Ring: 040, 2 7/8 in Nominal Inside Dia., 3 in Nominal Outside Dia., 75 Shore A, Brown, 10 PK O-Ring: 022, 1 in Nominal Inside Dia., 1 1/8 in Nominal Outside Dia., 70 Shore A, Black, Inch, 50 PK O-Ring: 151, 3 in Nominal Inside Dia., 3 3/16 in Nominal Outside Dia., 90 Shore A, Black, 10 PK O-Ring: 88 mm Nominal Inside Dia., 94 mm Nominal Outside Dia., 94 mm Actual Outside Dia., 10 PK O-Ring: 028, 1 3/8 in Nominal Inside Dia., 1 1/2 in Nominal Outside Dia., 75 Shore A, Black, Inch Backup Ring, Contoured: Buna N, For 172, 0.053 in Thick, 0.129 in Radius, 5 PK O-Ring: 315, 13/16 in Nominal Inside Dia., 1 3/16 in Nominal Outside Dia., 90 Shore A, Black, 10 PK O-Ring: 215 mm Nominal Inside Dia., 227 mm Nominal Outside Dia., 227 mm Actual Outside Dia., Black O-Ring: 328, 1 7/8 in Nominal Inside Dia., 2 1/4 in Nominal Outside Dia., 90 Shore A O-Ring: 175, 9 in Nominal Inside Dia., 9 3/16 in Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 017, 11/16 in Nominal Inside Dia., 13/16 in Nominal Outside Dia., 70 Shore A, Blue, 5 PK O-Ring: 228, 2 1/4 in Nominal Inside Dia., 2 1/2 in Nominal Outside Dia., 50 Shore A, Black, 10 PK O-Ring: 211, 13/16 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 215, 1 1/16 in Nominal Inside Dia., 1 5/16 in Nominal Outside Dia., 70 Shore A, Red, 25 PK O-Ring: 29.5 mm Nominal Inside Dia., 35.5 mm Nominal Outside Dia., 70 Shore A, Black, 50 PK O-Ring: 232, 2 3/4 in Nominal Inside Dia., 3 in Nominal Outside Dia., 3.012 in Actual Outside Dia. O-Ring: 016, 5/8 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 70 Shore A, Black, 100 PK Backup Ring, Contoured: Buna N, For 373, 0.076 in Thick, 0.262 in Radius, 5 PK ◀◀ ◀ ▶ ▶▶
