5.7MM CS X 249.3MM ID BLACK BUNA 90D

Buna-N O-Ring, 5.7 x 249.3 mm, 90A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Durometer
90 Shore A
Cross Section Type
Round
Color
Black
Minimum Temperature
-40°F (-40°C)
Maximum Temperature
250°F (121°C)
Unit of Measure
EA
SKU:
H90M5.7X249.3
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Product Specification

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APG stocks the H90M5.7X249.3, a black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 249.3 mm (9.815 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 260.7 mm (10.26 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. This item is further identified as Metric O-RING, JIS G250.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, reliable performance in both static and dynamic service. This material stands up to propane and butane, hydraulic fluids, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

Typical settings include agricultural equipment, hydraulic and pneumatic systems, and construction equipment.

Reference part number H90M5.7X249.3 when ordering; the item is sold individually. Unit weight is approximately 28.401 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Item
H90M5.7X249.3
Description
5.7MM CS X 249.3MM ID BLACK BUNA 90D
Actual Outside Diameter
260.7 mm (10.26 inch)
Actual Cross Section
5.7 mm (0.224 inch)
Actual Inside Diameter
249.3 mm (9.815 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity