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. ◀◀ ◀ ▶ ▶▶ Backup Ring, Contoured: Buna N, For 110, 0.053 in Thick, 0.129 in Radius, 100 PK O-Ring: 454, 12 1/2 in Nominal Inside Dia., 13 in Nominal Outside Dia., 90 Shore A, Black O-Ring: 011, 5/16 in Nominal Inside Dia., 7/16 in Nominal Outside Dia., 75 Shore A, Black, 25 PK O-Ring: 21.3 mm Nominal Inside Dia., 28.5 mm Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 363, 6 1/2 in Nominal Inside Dia., 6 7/8 in Nominal Outside Dia., 80 Shore A, Black O-Ring: 32 mm Nominal Inside Dia., 38 mm Nominal Outside Dia., 38 mm Actual Outside Dia., Std, 50 PK O-Ring: 45 mm Nominal Inside Dia., 47 mm Nominal Outside Dia., 47 mm Actual Outside Dia., 5 PK Backup Ring, Contoured: Buna N, For 392, 0.076 in Thick, 0.262 in Radius, 2 PK O-Ring: 166, 6 3/4 in Nominal Inside Dia., 6 15/16 in Nominal Outside Dia., 90 Shore A, Black, 2 PK O-Ring: 442, 7 1/4 in Nominal Inside Dia., 7 3/4 in Nominal Outside Dia., 85 Shore A Backup Ring, Contoured: Buna N, For 444, 0.117 in Thick, 0.344 in Radius, 5 PK O-Ring: 54 mm Nominal Inside Dia., 62 mm Nominal Outside Dia., 62 mm Actual Outside Dia., 75 Shore A O-Ring: 5.7 mm Nominal Inside Dia., 9.5 mm Nominal Outside Dia., 9.5 mm Actual Outside Dia., 50 PK O-Ring: 228, 2 1/4 in Nominal Inside Dia., 2 1/2 in Nominal Outside Dia., 90 Shore A, Black, 5 PK O-Ring: 99.6 mm Nominal Inside Dia., 111 mm Nominal Outside Dia., 111 mm Actual Outside Dia., Black O-Ring: 009, 7/32 in Nominal Inside Dia., 11/32 in Nominal Outside Dia., 70 Shore A, Blue, 5 PK O-Ring: 74.4 mm Nominal Inside Dia., 80.6 mm Nominal Outside Dia., 80.6 mm Actual Outside Dia., 2 PK O-Ring: 009, 7/32 in Nominal Inside Dia., 11/32 in Nominal Outside Dia., 75 Shore A, Black, Inch O-Ring: 26 mm Nominal Inside Dia., 33 mm Nominal Outside Dia., 33 mm Actual Outside Dia., 25 PK O-Ring: 214.5 mm Nominal Inside Dia., 231.3 mm Nominal Outside Dia., 231.3 mm Actual Outside Dia. ◀◀ ◀ ▶ ▶▶
