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: 178 mm Nominal Inside Dia., 184 mm Nominal Outside Dia., 184 mm Actual Outside Dia., 5 PK Backup Ring, Contoured: Buna N, For 315, 0.076 in Thick, 0.262 in Radius, 100 PK O-Ring: 235, 3 1/8 in Nominal Inside Dia., 3 3/8 in Nominal Outside Dia., 75 Shore A, Brown, 5 PK O-Ring: 212, 7/8 in Nominal Inside Dia., 1 1/8 in Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 38 mm Nominal Inside Dia., 43 mm Nominal Outside Dia., 43 mm Actual Outside Dia., 10 PK O-Ring: 334.5 mm Nominal Inside Dia., 351.3 mm Nominal Outside Dia., 351.3 mm Actual Outside Dia. O-Ring: 7 mm Nominal Inside Dia., 10 mm Nominal Outside Dia., 10 mm Actual Outside Dia., 50 PK O-Ring: 67 mm Nominal Inside Dia., 74 mm Nominal Outside Dia., 74 mm Actual Outside Dia., 25 PK Backup Ring, Contoured: Buna N, For 226, 0.05 in Thick, 0.174 in Radius, 50 PK O-Ring: 441, 7 in Nominal Inside Dia., 7 1/2 in Nominal Outside Dia., 70 Shore A, Red, 2 PK Backup Ring, Contoured: Buna N, For 023, 0.049 in Thick, 0.087 in Radius, 100 PK O-Ring: 100 mm Nominal Inside Dia., 105 mm Nominal Outside Dia., 105 mm Actual Outside Dia., 2 PK O-Ring: 310, 1/2 in Nominal Inside Dia., 7/8 in Nominal Outside Dia., 70 Shore A, Black, 50 PK O-Ring: 314, 3/4 in Nominal Inside Dia., 1 1/8 in Nominal Outside Dia., 70 Shore A, Black, 50 PK O-Ring: 472, 23 in Nominal Inside Dia., 23 1/2 in Nominal Outside Dia., 23.49 in Actual Outside Dia. O-Ring: 111, 7/16 in Nominal Inside Dia., 5/8 in Nominal Outside Dia., 75 Shore A, Brown, 50 PK O-Ring: 172 mm Nominal Inside Dia., 180 mm Nominal Outside Dia., 180 mm Actual Outside Dia., 2 PK O-Ring: 22 mm Nominal Inside Dia., 30 mm Nominal Outside Dia., 30 mm Actual Outside Dia., 50 PK O-Ring: 154, 3 3/4 in Nominal Inside Dia., 3 15/16 in Nominal Outside Dia., 70 Shore A, Red, 10 PK O-Ring: 5 mm Nominal Inside Dia., 9 mm Nominal Outside Dia., 9 mm Actual Outside Dia., Black, 25 PK ◀◀ ◀ ▶ ▶▶
