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: Hytrel, For 19, 0.045 in Thick, Black, 50 PK O-Ring: 110, 3/8 in Nominal Inside Dia., 9/16 in Nominal Outside Dia., 70 Shore A, Black, FDA, 25 PK Backup Ring, Contoured: Buna N, For 391, 0.076 in Thick, 0.262 in Radius, 2 PK O-Ring: 221, 1 7/16 in Nominal Inside Dia., 1 11/16 in Nominal Outside Dia., 75 Shore A, 10 PK O-Ring: 016, 5/8 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 70 Shore A, Red, 10 PK O-Ring: 383, 14 in Nominal Inside Dia., 14 3/8 in Nominal Outside Dia., 90 Shore A, Black O-Ring: 378, 10 1/2 in Nominal Inside Dia., 10 7/8 in Nominal Outside Dia., 70 Shore A, Red, 5 PK O-Ring: 445, 8 in Nominal Inside Dia., 8 1/2 in Nominal Outside Dia., 8.525 in Actual Outside Dia. O-Ring: 394, 25 in Nominal Inside Dia., 25 3/8 in Nominal Outside Dia., 25.36 in Actual Outside Dia. O-Ring: 380, 11 1/2 in Nominal Inside Dia., 11 7/8 in Nominal Outside Dia., 90 Shore A, Black O-Ring: 20 mm Nominal Inside Dia., 26 mm Nominal Outside Dia., 26 mm Actual Outside Dia., Std, 50 PK O-Ring: 17.1 mm Nominal Inside Dia., 20.3 mm Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 25.7 mm Nominal Inside Dia., 32.7 mm Nominal Outside Dia., 70 Shore A, Black, Metric, 25 PK O-Ring: 59 mm Nominal Inside Dia., 65 mm Nominal Outside Dia., 65 mm Actual Outside Dia., 8 PK Backup Ring, Contoured: Buna N, For 247, 0.05 in Thick, 0.174 in Radius, 25 PK O-Ring: 125, 1 5/16 in Nominal Inside Dia., 1 1/2 in Nominal Outside Dia., 70 Shore A, Black, 100 PK O-Ring: 027, 1 5/16 in Nominal Inside Dia., 1 7/16 in Nominal Outside Dia., 90 Shore A, Black, 50 PK O-Ring: 49 mm Nominal Inside Dia., 53 mm Nominal Outside Dia., 53 mm Actual Outside Dia., 25 PK O-Ring: 58 mm Nominal Inside Dia., 65 mm Nominal Outside Dia., 65 mm Actual Outside Dia., 10 PK O-Ring: 139, 2 3/16 in Nominal Inside Dia., 2 3/8 in Nominal Outside Dia., 90 Shore A, Black, 10 PK ◀◀ ◀ ▶ ▶▶
