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90 Durometer Buna-N O-Ring, Inch OD, 7/8 Inch ID, 0.14 Inch Width

Description & Features

Rated at 90 durometer, this Buna-N compound O-ring offers firm compression resistance suited for hydraulic and pneumatic sealing applications where softer materials may extrude under pressure. The material performs across a temperature range of -40°F to 240°F, making it compatible with a broad range of fluid media and service conditions.

The 90 Durometer Buna-N O-Ring carries a nominal 7/8 inch ID and 1-1/8 inch OD with a 1/8 inch cross-section width. Actual dimensions measure 0.859 inch ID, 1.137 inch OD, and 0.139 inch width. Manufactured by Hercules Sealing Products and assigned dash size -212, this O-ring is packaged in quantities of 25.

SKU: A-212-90D

Supplier Part Number (MPN): 568-212-90D

Alternate Part Numbers: C1FF85, MI-08740417, MINO-00407X90417

Specifications

Actual I.D. 0.86	Actual O.D. 1.14	Actual Width 0.139 in	Dash Size -212	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Nominal I.D. (in) 7/8	Nominal O.D. 1-1/8	Nominal Width 1/8	Package Qty. 25	Supplier Part Number 568-212-90D	Alternate Part Numbers Alternate Part Number 568-212-90D, Alternate Part Number C1FF85, Alternate Part Number MI-08740417, Alternate Part Number MINO-00407X90417	Product Weight 0.01 lbs

Similar Products

Model Number	Dash Size	Nominal I.D. (in)	Nominal O.D.	Nominal Width	Actual I.D.	Actual O.D.	Actual Width	Package Qty.
A-219-90D 90 Durometer Buna-N O-Ring	-219	1-5/16	1-9/16	1/8	1.296	1.574	0.139 in	19
A-012-90D 90 Durometer Buna-N O-Ring	-012	3/8	1/2	1/16	0.364	0.504	0.07 in	34
A-014-90D 90 Durometer Buna-N O-Ring	-014	1/2	5/8	1/16	0.489	0.629	0.07 in	34
A-210-90D 90 Durometer Buna-N O-Ring	-210	3/4	1	1/8	0.734	1.012	0.139 in	25
A-212-90D 90 Durometer Buna-N O-Ring	-212	7/8	1-1/8	1/8	0.859	1.137	0.139 in	25
A-214-90D 90 Durometer Buna-N O-Ring	-214	1	1-1/4	1/8	0.984	1.262	0.139 in	23
A-222-90D 90 Durometer Buna-N O-Ring	-222	1-1/2	1-3/4	1/8	1.484	1.762	0.139 in	19
A-225-90D 90 Durometer Buna-N O-Ring	-225	1-7/8	2-1/8	1/8	1.859	2.137	0.139 in	2

Product Questions & Answers (1)

Question by: Lance C on Jul 11, 2025, 8:05 PM

these come in a pack of 25, right? just want to make sure before i order cause i only need enough to get through a repair job and don't want to be stuck with a mountain of extras

Answer by: Customer Support on Jul 13, 2025, 6:33 AM

they're packaged 25 per order. For a single repair job that might feel like more than you need, but O-rings at this size tend to disappear fast once you're mid-job, so having spares on hand usually saves a second trip to the parts bin.