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: 41 mm Nominal Inside Dia., 51 mm Nominal Outside Dia., 51 mm Actual Outside Dia., Std, 2 PK O-Ring: 70 mm Nominal Inside Dia., 76 mm Nominal Outside Dia., 76 mm Actual Outside Dia., 75 Shore A Backup Ring, Contoured: Buna N, For 274, 0.05 in Thick, 0.174 in Radius, 5 PK O-Ring: 270 mm Nominal Inside Dia., 278 mm Nominal Outside Dia., 278 mm Actual Outside Dia., Black O-Ring: 260, 6 1/2 in Nominal Inside Dia., 6 3/4 in Nominal Outside Dia., 90 Shore A, Black, 2 PK O-Ring: 21 mm Nominal Inside Dia., 29 mm Nominal Outside Dia., 29 mm Actual Outside Dia., 25 PK O-Ring: 8 mm Nominal Inside Dia., 12.8 mm Nominal Outside Dia., 12.8 mm Actual Outside Dia., 50 PK O-Ring: 14.5 mm Nominal Inside Dia., 22.5 mm Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 144.5 mm Nominal Inside Dia., 150.5 mm Nominal Outside Dia., 70 Shore A, Black, 5 PK O-Ring: 015, 9/16 in Nominal Inside Dia., 11/16 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 015, 9/16 in Nominal Inside Dia., 11/16 in Nominal Outside Dia., 70 Shore A, 25,000 PK O-Ring: 234, 3 in Nominal Inside Dia., 3 1/4 in Nominal Outside Dia., 75 Shore A, Brown, 5 PK O-Ring: 333, 2 1/2 in Nominal Inside Dia., 2 7/8 in Nominal Outside Dia., 50 Shore A, Black, 5 PK O-Ring: 62 mm Nominal Inside Dia., 68 mm Nominal Outside Dia., 68 mm Actual Outside Dia., 5 PK O-Ring: 118, 7/8 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 70 Shore A, Black, 25 PK Backup Ring: Hytrel, For 17, 0.045 in Thick, Black, 50 PK O-Ring: 217, 1 3/16 in Nominal Inside Dia., 1 7/16 in Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 90 mm Nominal Inside Dia., 93 mm Nominal Outside Dia., 93 mm Actual Outside Dia., 5 PK O-Ring: 241, 3 7/8 in Nominal Inside Dia., 4 1/8 in Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 6.3 mm Nominal Inside Dia., 11.1 mm Nominal Outside Dia., 11.1 mm Actual Outside Dia., 25 PK ◀◀ ◀ ▶ ▶▶
