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90 Durometer Buna-N O-Ring, Inch OD, 3/8 Inch ID, 0.07 Inch Width

Description & Features

This Hercules Sealing Products O-Ring is made from 90 Durometer Buna-N, offering reliable sealing in a temperature range of -40°F to 240°F. With a nominal 1/2 inch outside diameter, 3/8 inch inside diameter, and 1/16 inch width, this 90 Durometer Buna-N O-Ring is suitable for a variety of hydraulic applications.

The actual dimensions are 0.364 inch ID, 0.504 inch OD, and 0.07 inch width. This O-ring conforms to Dash Size -012 specifications and is identified by catalog number C1FA96.

SKU: A-012-90D

Supplier Part Number (MPN): 568-012-90D

Alternate Part Numbers: C1FA96, D03-ORING, MI-08740305, MINO-00407X90305

Specifications

Actual I.D. 0.36	Actual O.D. 0.50	Actual Width 0.07 in	Dash Size -012	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Nominal I.D. (in) 3/8	Nominal O.D. 1/2	Nominal Width 1/16	Package Qty. 34	Supplier Part Number 568-012-90D	Alternate Part Numbers Alternate Part Number 568-012-90D, Alternate Part Number C1FA96, Alternate Part Number D03-ORING, Alternate Part Number MI-08740305, Alternate Part Number MINO-00407X90305	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 (3)

Question by: Jimmy B on Aug 14, 2025, 9:52 PM

trying to swap an old -012 o-ring, is this the right dash size and how big is it really?

Answer by: Customer Support on Aug 16, 2025, 12:13 PM

Match-up wise, it is a Dash Size -012 O-ring. The nominal size is 3/8 inch ID, 1/2 inch OD, and 1/16 inch width, and the actual measured dimensions are 0.364 inch ID, 0.504 inch OD, and 0.07 inch width.

Question by: Freddie A on Aug 18, 2025, 7:08 PM

Will this here O-ring hold up to hydraulic fluid alright?

Answer by: Customer Support on Aug 20, 2025, 6:59 AM

Made from 90 Durometer Buna-N, it's designed to handle standard hydraulic applications within its temperature range. Just be sure your system stays between -40°F and 240°F.

Question by: Dwight H on Jun 8, 2025, 2:31 PM

These rated for real cold temps? Got equipment running outside through winter and need something that ain't gonna crack up on me.

Answer by: Customer Support on Jun 10, 2025, 10:22 AM

Buna-N at 90 durometer holds up from -40°F all the way to 240°F, so winter outdoor use is well within range. The higher durometer rating means this is a firmer compound, which actually helps it hold its shape under pressure in fluctuating temperatures rather than getting soft or deforming.