5MM CS X 18MM ID BLACK BUNA 70D

Buna-N O-Ring, 5 x 18 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Durometer
70 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:
H5X18
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Product Specification

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Ordered as H5X18, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 18 mm (0.709 in), a cross section of 5 mm (0.197 in), and an outside diameter of 28 mm (1.1 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. The material holds up against many alcohols, hydraulic fluids, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or ozone and direct sunlight call for a different compound.

Maintenance and OEM teams specify it across construction equipment, hydraulic and pneumatic systems, and agricultural equipment.

H5X18 ships individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Item
H5X18
Description
5MM CS X 18MM ID BLACK BUNA 70D
Actual Outside Diameter
28 mm (1.1 inch)
Actual Cross Section
5 mm (0.197 inch)
Actual Inside Diameter
18 mm (0.709 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity