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: 022, 1 in Nominal Inside Dia., 1 1/8 in Nominal Outside Dia., 70 Shore A, Black, 50 PK O-Ring: 134 mm Nominal Inside Dia., 140 mm Nominal Outside Dia., 140 mm Actual Outside Dia., Black O-Ring: 39.5 mm Nominal Inside Dia., 43.01 mm Nominal Outside Dia., 70 Shore A, Black, 10 PK O-Ring: 041, 3 in Nominal Inside Dia., 3 1/8 in Nominal Outside Dia., 70 Shore A, Black, 2,500 PK Backup Ring: Hytrel, For 236, 0.045 in Thick, Black, 25 PK O-Ring: 278, 12 in Nominal Inside Dia., 12 1/4 in Nominal Outside Dia., 70 Shore A, Red, 5 PK O-Ring: 151, 3 in Nominal Inside Dia., 3 3/16 in Nominal Outside Dia., 50 Shore A, Black, 25 PK O-Ring: 35 mm Nominal Inside Dia., 41 mm Nominal Outside Dia., 41 mm Actual Outside Dia., Red, 10 PK O-Ring: 223, 1 5/8 in Nominal Inside Dia., 1 7/8 in Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 9 mm Nominal Inside Dia., 15 mm Nominal Outside Dia., 15 mm Actual Outside Dia., 100 PK O-Ring: 6.5 mm Nominal Inside Dia., 9.5 mm Nominal Outside Dia., 9.5 mm Actual Outside Dia., 50 PK O-Ring: 319, 1 1/16 in Nominal Inside Dia., 1 7/16 in Nominal Outside Dia., 70 Shore A, Red, 50 PK O-Ring: 19 mm Nominal Inside Dia., 24 mm Nominal Outside Dia., 24 mm Actual Outside Dia., 100 PK O-Ring: 009, 7/32 in Nominal Inside Dia., 11/32 in Nominal Outside Dia., 75 Shore A, Black, 25 PK O-Ring: 170 mm Nominal Inside Dia., 176 mm Nominal Outside Dia., 176 mm Actual Outside Dia., 5 PK O-Ring: 114, 5/8 in Nominal Inside Dia., 13/16 in Nominal Outside Dia., 70 Shore A, Black, 100 PK O-Ring: 250 mm Nominal Inside Dia., 260 mm Nominal Outside Dia., 260 mm Actual Outside Dia., Black O-Ring: 219, 1 5/16 in Nominal Inside Dia., 1 9/16 in Nominal Outside Dia., 80 Shore A, Black, 5 PK O-Ring: 84.5 mm Nominal Inside Dia., 90.5 mm Nominal Outside Dia., 70 Shore A, Black, 20 PK O-Ring: 468, 19 1/2 in Nominal Inside Dia., 20 in Nominal Outside Dia., 90 Shore A, Black ◀◀ ◀ ▶ ▶▶