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90 Durometer Buna-N O-Ring, Inch OD, 1/2 Inch ID, 0.07 Inch Width

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Description & Features

Rated at 90 durometer, this Buna-N o-ring offers a firmer compression resistance suited to higher-pressure sealing applications in hydraulic and industrial equipment. The material provides reliable performance across a temperature range of -40°F to 240°F, making it compatible with a wide range of hydraulic fluids and operating environments.

The 90 Durometer Buna-N O-Ring, 5/8 Inch OD, 1/2 Inch ID, 0.07 Inch Width carries a dash size of -014, with actual dimensions of 0.489 in. ID, 0.629 in. OD, and 0.070 in. width. It is manufactured by Hercules Sealing Products and cataloged under number C1CD18.

SKU: A-014-90D

Supplier Part Number (MPN): 568-014-90D

Alternate Part Numbers: C1CD18, D05-ORING, MI-08740308, MINO-00407X90308

Specifications

Actual I.D.
0.49
Actual O.D.
0.63
Actual Width
0.07 in
Dash Size
-014
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Nominal I.D. (in)
1/2
Nominal O.D.
5/8
Nominal Width
1/16
Package Qty.
34
Supplier Part Number
568-014-90D
Alternate Part Numbers
Alternate Part Number 568-014-90D, Alternate Part Number C1CD18, Alternate Part Number D05-ORING, Alternate Part Number MI-08740308, Alternate Part Number MINO-00407X90308
Product Weight
0.01 lbs

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Product Questions & Answers (1)

Question by: Joyce G on Jan 6, 2026, 3:34 PM
these are 90 duro, not the standard 70 -- does that harder compound actually hold up better at higher pressures or is it just a tradeoff for less flexibility?
Answer by: Customer Support on Jan 7, 2026, 9:54 PM
Harder durometer ratings do give you better resistance to compression and extrusion under pressure, which is why 90 durometer gets specified in hydraulic applications where a softer ring might deform or blow past the sealing surface. The tradeoff is that it requires a well-machined groove and surface finish to seat properly, since the ring won't conform as readily to minor surface irregularities. For higher-pressure hydraulic work, that firmness is usually the right call.