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

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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

Brand
HERCULES® SEALING PRODUCTS
Color
Black
Cross Section Shape
Round
Dash Size
12
Durometer
90
Inside Diameter
0.38 in
Material
Buna-N
Series
568 Series
Suitable For Use With
Hydraulic Cylinders
System of Measurement
Imperial

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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.

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