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: 236, 3 1/4 in Nominal Inside Dia., 3 1/2 in Nominal Outside Dia., 90 Shore A O-Ring: 177, 9 1/2 in Nominal Inside Dia., 9 11/16 in Nominal Outside Dia., 75 Shore A, Brown, 2 PK O-Ring: 237, 3 3/8 in Nominal Inside Dia., 3 5/8 in Nominal Outside Dia., 75 Shore A, Brown, 5 PK Backup Ring, Contoured: Buna N, For 269, 0.05 in Thick, 0.174 in Radius, 5 PK O-Ring: 10 mm Nominal Inside Dia., 13 mm Nominal Outside Dia., 13 mm Actual Outside Dia., Std, 25 PK O-Ring: 019, 13/16 in Nominal Inside Dia., 15/16 in Nominal Outside Dia., 70 Shore A, White, 25 PK O-Ring: 27 mm Nominal Inside Dia., 31 mm Nominal Outside Dia., 31 mm Actual Outside Dia., 10 PK O-Ring: 102 mm Nominal Inside Dia., 106 mm Nominal Outside Dia., 106 mm Actual Outside Dia., 5 PK O-Ring: 411, 2 3/4 in Nominal Inside Dia., 3 1/4 in Nominal Outside Dia., 70 Shore A, Red O-Ring: 007, 5/32 in Nominal Inside Dia., 9/32 in Nominal Outside Dia., 0.285 in Actual Outside Dia. O-Ring: 021, 15/16 in Nominal Inside Dia., 1 1/16 in Nominal Outside Dia., 75 Shore A, Black, 10 PK Backup Ring, Contoured: Buna N, For 255, 0.05 in Thick, 0.174 in Radius, 10 PK O-Ring: 38 mm Nominal Inside Dia., 43 mm Nominal Outside Dia., 43 mm Actual Outside Dia., Std, 5 PK O-Ring: 30 mm Nominal Inside Dia., 36 mm Nominal Outside Dia., 36 mm Actual Outside Dia., Red, 10 PK O-Ring: 15 mm Nominal Inside Dia., 19 mm Nominal Outside Dia., 19 mm Actual Outside Dia., 100 PK O-Ring: 100 mm Nominal Inside Dia., 104 mm Nominal Outside Dia., 104 mm Actual Outside Dia., 2 PK O-Ring: 32 mm Nominal Inside Dia., 42 mm Nominal Outside Dia., 42 mm Actual Outside Dia., Std, 2 PK O-Ring: 335, 2 3/4 in Nominal Inside Dia., 3 1/8 in Nominal Outside Dia., 75 Shore A, Black O-Ring: 220, 1 3/8 in Nominal Inside Dia., 1 5/8 in Nominal Outside Dia., 70 Shore A, Black, 25 PK O-Ring: 37 mm Nominal Inside Dia., 47 mm Nominal Outside Dia., 47 mm Actual Outside Dia., 10 PK ◀◀ ◀ ▶ ▶▶
