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: 13.1 mm Nominal Inside Dia., 16.3 mm Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 340, 3 3/8 in Nominal Inside Dia., 3 3/4 in Nominal Outside Dia., 90 Shore A, Black, 5 PK O-Ring: 11 mm Nominal Inside Dia., 17 mm Nominal Outside Dia., 17 mm Actual Outside Dia., 100 PK O-Ring: 30.2 mm Nominal Inside Dia., 36.2 mm Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 100 mm Nominal Inside Dia., 110 mm Nominal Outside Dia., 110 mm Actual Outside Dia., 10 PK O-Ring: 030, 1 5/8 in Nominal Inside Dia., 1 3/4 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 118, 7/8 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 70 Shore A, Natural, 2 PK O-Ring: 215, 1 1/16 in Nominal Inside Dia., 1 5/16 in Nominal Outside Dia., 75 Shore A, Brown, 25 PK O-Ring: 40 mm Nominal Inside Dia., 46 mm Nominal Outside Dia., 46 mm Actual Outside Dia., Std, 25 PK O-Ring: 428, 4 7/8 in Nominal Inside Dia., 5 3/8 in Nominal Outside Dia., 70 Shore A, Black, 5 PK O-Ring: 155, 4 in Nominal Inside Dia., 4 3/16 in Nominal Outside Dia., 90 Shore A, Black, 2 PK O-Ring Assortment: SAE, PTFE, 325 Pieces, 36 # of Sizes, 55 Shore D O-Ring: 12.1 mm Nominal Inside Dia., 15.3 mm Nominal Outside Dia., 70 Shore A, Red, 25 PK O-Ring: 9.1 mm Nominal Inside Dia., 12.3 mm Nominal Outside Dia., 70 Shore A, Black, Metric, 100 PK O-Ring: 38 mm Nominal Inside Dia., 44 mm Nominal Outside Dia., 44 mm Actual Outside Dia., 25 PK O-Ring: 261, 6 3/4 in Nominal Inside Dia., 7 in Nominal Outside Dia., 70 Shore A, Black, Inch, 10 PK Backup Ring: Hytrel, For 207, 0.045 in Thick, Black, 50 PK O-Ring: 17 mm Nominal Inside Dia., 23 mm Nominal Outside Dia., 23 mm Actual Outside Dia., 25 PK O-Ring: 122, 1 1/8 in Nominal Inside Dia., 1 5/16 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 13 mm Nominal Inside Dia., 15 mm Nominal Outside Dia., 15 mm Actual Outside Dia., 100 PK ◀◀ ◀ ▶ ▶▶