Zoro Select O-Ring 38 mm x 2.5 mm Buna-N Black PK50
Pack of 50 black Buna-N O-rings with 38 mm inside diameter and 2.5 mm cross-section, rated to 70A durometer and -40 to 250 °F
- Metric 38 mm ID for standard groove fit
- Buna-N 70A durometer resists oil and fuel
- 40 °F to 250 °F range handles extreme temps
- Black colour allows quick visual inspection
- Pack of 50 supplies multiple repair jobs
O-Ring 38 mm Buna-N Pack of 50
This pack supplies fifty black Buna-N O-rings with a 38 mm inside diameter and 2.5 mm cross-section. They are made to metric dimensions and carry a 70A durometer rating for medium-hard sealing performance. The material withstands temperatures from -40 to 250 degrees Fahrenheit. These rings are metal detectable but not X-ray detectable.
Seals for Metric Hydraulic and Pneumatic Fittings
Maintenance teams and engineers who need metric Buna-N seals in this exact size will find the pack convenient. Buyers requiring FDA-compliant material or X-ray detectable rings for food or pharmaceutical lines cannot use this product. Anyone needing imperial dimensions or a different durometer should look elsewhere.
Critical Spec 38 mm ID 2.5 mm CS Buna-N 70A
The single specification that decides fit is the 38 mm nominal inside diameter combined with the 2.5 mm cross-section and 70A Buna-N hardness. Verify these three values against your groove design before ordering. The 43 mm outside diameter follows from these figures.
How it compares
Measured against everything we stock in Threadlockers & Sealants, at today’s prices. Recalculated every night.
- Price $9.99
- Cheaper than about 70% of the 147 comparable items (median $11.99).
Specifications
| Product | |
|---|---|
| Brand name | ZORO SELECT |
Questions about this item
How can I confirm the 38 mm inside diameter and 2.5 mm cross-section are correct after installation?
Measure the installed ring with a calibrated gauge; the actual inside diameter should read 38 mm and the actual width 2.5 mm, matching the supplied dimensions.
What comes in the package and what additional items are needed for a typical seal?
The pack contains 50 black Buna-N O-rings sized 38 mm ID by 2.5 mm CS; compatible lubricant or installation tools are not included and must be sourced separately.
Which durometer and temperature rating should I select for a medium-hard seal operating up to 250 °F?
Choose the 70A durometer version listed; it is rated for a continuous range of -40 °F to 250 °F and suits medium-hard sealing requirements.
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