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: 70 mm Nominal Inside Dia., 82 mm Nominal Outside Dia., 82 mm Actual Outside Dia., 2 PK O-Ring: 008, 3/16 in Nominal Inside Dia., 5/16 in Nominal Outside Dia., 70 Shore A, Black, 25 PK Backup Ring, Contoured: Buna N, For 316, 0.076 in Thick, 0.262 in Radius, 100 PK Backup Ring, Contoured: Buna N, For 018, 0.049 in Thick, 0.087 in Radius, 100 PK O-Ring: 024, 1 1/8 in Nominal Inside Dia., 1 1/4 in Nominal Outside Dia., 70 Shore A, Black, 50 PK O-Ring: 259, 6 1/4 in Nominal Inside Dia., 6 1/2 in Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 015, 9/16 in Nominal Inside Dia., 11/16 in Nominal Outside Dia., 70 Shore A, Black, 100 PK O-Ring: 195 mm Nominal Inside Dia., 202 mm Nominal Outside Dia., 202 mm Actual Outside Dia., Black Backup Ring, Contoured: Buna N, For 374, 0.076 in Thick, 0.262 in Radius, 5 PK O-Ring: 435, 5 3/4 in Nominal Inside Dia., 6 1/4 in Nominal Outside Dia., 70 Shore A, Red, 5 PK O-Ring: 51.6 mm Nominal Inside Dia., 63 mm Nominal Outside Dia., 63 mm Actual Outside Dia., 5 PK O-Ring: 229, 2 3/8 in Nominal Inside Dia., 2 5/8 in Nominal Outside Dia., 75 Shore A, Blue O-Ring: 428, 4 7/8 in Nominal Inside Dia., 5 3/8 in Nominal Outside Dia., 90 Shore A, Black, 2 PK O-Ring: 113, 9/16 in Nominal Inside Dia., 3/4 in Nominal Outside Dia., 50 Shore A, Black, 25 PK O-Ring: 193 mm Nominal Inside Dia., 200 mm Nominal Outside Dia., 200 mm Actual Outside Dia., Black Backup Ring: Hytrel, For 230, 0.045 in Thick, Black, 50 PK O-Ring: 003, 1/16 in Nominal Inside Dia., 3/16 in Nominal Outside Dia., 70 Shore A, Black, 5 PK O-Ring: 33 mm Nominal Inside Dia., 38 mm Nominal Outside Dia., 38 mm Actual Outside Dia., 5 PK O-Ring: 436, 5 7/8 in Nominal Inside Dia., 6 3/8 in Nominal Outside Dia., 70 Shore A, Red, 5 PK O-Ring: 211, 13/16 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 75 Shore A, Blue, 2 PK ◀◀ ◀ ▶ ▶▶
