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: 249, 4 7/8 in Nominal Inside Dia., 5 1/8 in Nominal Outside Dia., 70 Shore A, Red, 10 PK O-Ring: 012, 3/8 in Nominal Inside Dia., 1/2 in Nominal Outside Dia., 75 Shore A, Brown, 100 PK O-Ring: 73 mm Nominal Inside Dia., 83 mm Nominal Outside Dia., 83 mm Actual Outside Dia., 5 PK O-Ring: 382, 13 in Nominal Inside Dia., 13 3/8 in Nominal Outside Dia., 90 Shore A, Black, Inch O-Ring: 127, 1 7/16 in Nominal Inside Dia., 1 5/8 in Nominal Outside Dia., 70 Shore A, Natural, 2 PK O-Ring: 261, 6 3/4 in Nominal Inside Dia., 7 in Nominal Outside Dia., 75 Shore A, Brown, 2 PK O-Ring: 178, 9 3/4 in Nominal Inside Dia., 9 15/16 in Nominal Outside Dia., 90 Shore A, Black, 2 PK O-Ring: 17 mm Nominal Inside Dia., 23 mm Nominal Outside Dia., 23 mm Actual Outside Dia., 100 PK Backup Ring, Contoured: Buna N, For 107, 0.053 in Thick, 0.129 in Radius, 100 PK O-Ring: 216, 1 1/8 in Nominal Inside Dia., 1 3/8 in Nominal Outside Dia., 75 Shore A, Black O-Ring: 13.8 mm Nominal Inside Dia., 18.6 mm Nominal Outside Dia., 70 Shore A, Black, 100 PK O-Ring: 020, 7/8 in Nominal Inside Dia., 1 in Nominal Outside Dia., 1.004 in Actual Outside Dia. O-Ring: 012, 3/8 in Nominal Inside Dia., 1/2 in Nominal Outside Dia., 70 Shore A, Black, Inch, 25 PK O-Ring: 911, 11/16 in Nominal Outside Dia., 1.095 in Actual Outside Dia., 90 Shore A, Black, 100 PK O-Ring: 16 mm Nominal Inside Dia., 20 mm Nominal Outside Dia., 20 mm Actual Outside Dia., Std, 10 PK O-Ring: 16 mm Nominal Inside Dia., 21 mm Nominal Outside Dia., 21 mm Actual Outside Dia., 25 PK O-Ring: 316, 7/8 in Nominal Inside Dia., 1 1/4 in Nominal Outside Dia., 90 Shore A, Black, 10 PK Backup Ring: Hytrel, For 338, 0.065 in Thick, Orange, 25 PK O-Ring: 391, 22 in Nominal Inside Dia., 22 3/8 in Nominal Outside Dia., 70 Shore A, Red O-Ring: 5.3 mm Nominal Inside Dia., 10.1 mm Nominal Outside Dia., 10.1 mm Actual Outside Dia., 50 PK ◀◀ ◀ ▶ ▶▶
