4MM CS X 103MM ID BLACK BUNA 70D

Buna-N O-Ring, 4 x 103 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:
H4X103
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Product Specification

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The H4X103 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 103 mm (4.055 in), a cross section of 4 mm (0.157 in), and an outside diameter of 111 mm (4.37 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) offers strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. This material stands up to water, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ozone and direct sunlight.

Common environments for this compound include automotive, agricultural equipment, and general industrial maintenance.

This item is sold individually under part number H4X103. Unit weight is approximately 5.2033 g. Review your operating media and conditions against this specification before 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
H4X103
Description
4MM CS X 103MM ID BLACK BUNA 70D
Actual Outside Diameter
111 mm (4.37 inch)
Actual Cross Section
4 mm (0.157 inch)
Actual Inside Diameter
103 mm (4.055 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity