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70 Durometer Buna-N O-Ring, Inch OD, 1 Inch ID, 0.21 Inch Width

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Description & Features

This 70 Durometer Buna-N O-Ring is suitable for a wide range of sealing applications. Constructed from 70 Durometer Buna-N, it provides reliable sealing performance in demanding environments.

The O-ring has a nominal inside diameter of 1 inch, an outside diameter of 1-3/8 inch, and a width of 3/16 inch. Actual measurements are 0.975 inch ID, 1.395 inch OD and a width of 0.21 inch. It is designed to withstand temperatures from -40°F to 240°F.

SKU: A-318

Supplier Part Number (MPN): 568-318

Alternate Part Numbers: C1CF59, MI-08740488, MINO-00407X90488

Specifications

Brand
HERCULES® SEALING PRODUCTS
Color
Black
Cross Section Shape
Round
Dash Size
318
Durometer
70A
Inside Diameter
1 in
Material
Buna-N
Series
568 Series
Suitable For Use With
Hydraulic Cylinders
System of Measurement
Imperial

Product Questions & Answers (1)

Question by: Brenda F on Jul 14, 2025, 9:54 AM
these come in a 20-pack, right? just wanna make sure before i order, got a big job coming up and need enough on hand
Answer by: Customer Support on Jul 16, 2025, 8:46 AM
sold in packs of 20. The actual inside diameter runs 0.975 inch, outside diameter is 1.395 inch, and the width comes in at 0.21 inch. Plenty to stock up for a bigger job without having to reorder mid-project.

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