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: 2.5 mm Nominal Inside Dia., 4.5 mm Nominal Outside Dia., 4.5 mm Actual Outside Dia., 100 PK O-Ring: 6 mm Nominal Inside Dia., 9 mm Nominal Outside Dia., 9 mm Actual Outside Dia., Black, 50 PK O-Ring: 216, 1 1/8 in Nominal Inside Dia., 1 3/8 in Nominal Outside Dia., 80 Shore A, Black, 10 PK O-Ring: 52 mm Nominal Inside Dia., 60 mm Nominal Outside Dia., 60 mm Actual Outside Dia., 75 Shore A O-Ring: 137, 2 1/16 in Nominal Inside Dia., 2 1/4 in Nominal Outside Dia., 55 Shore D, White, 5 PK O-Ring: 11 mm Nominal Inside Dia., 15 mm Nominal Outside Dia., 15 mm Actual Outside Dia., Std, 10 PK O-Ring: 78 mm Nominal Inside Dia., 90 mm Nominal Outside Dia., 90 mm Actual Outside Dia., 2 PK Backup Ring, Contoured: Buna N, For 319, 0.076 in Thick, 0.262 in Radius, 100 PK O-Ring: 250, 5 in Nominal Inside Dia., 5 1/4 in Nominal Outside Dia., 55 Shore D, White, 2 PK O-Ring: 914, 7/8 in Nominal Outside Dia., 1.279 in Actual Outside Dia., 90 Shore A, Black, 25 PK O-Ring: 3 mm Nominal Inside Dia., 7 mm Nominal Outside Dia., 7 mm Actual Outside Dia., Red, 50 PK O-Ring: 70 mm Nominal Inside Dia., 75 mm Nominal Outside Dia., 75 mm Actual Outside Dia., Std, 10 PK O-Ring: 84 mm Nominal Inside Dia., 90 mm Nominal Outside Dia., 90 mm Actual Outside Dia., 25 PK O-Ring: 22 mm Nominal Inside Dia., 27 mm Nominal Outside Dia., 27 mm Actual Outside Dia., Std, 10 PK O-Ring: 145 mm Nominal Inside Dia., 151 mm Nominal Outside Dia., 151 mm Actual Outside Dia., Black O-Ring: 001, 1/32 in Nominal Inside Dia., 3/32 in Nominal Outside Dia., 0.109 in Actual Outside Dia. O-Ring: 418, 3 5/8 in Nominal Inside Dia., 4 1/8 in Nominal Outside Dia., 70 Shore A, Red O-Ring: 73 mm Nominal Inside Dia., 76 mm Nominal Outside Dia., 76 mm Actual Outside Dia., 5 PK O-Ring: 108, 1/4 in Nominal Inside Dia., 7/16 in Nominal Outside Dia., 75 Shore A, Brown, 50 PK O-Ring: 255, 5 5/8 in Nominal Inside Dia., 5 7/8 in Nominal Outside Dia., 75 Shore A, Brown, 2 PK ◀◀ ◀ ▶ ▶▶
