N9 (90 Duro) Oil Resistant Nitrile O-Rings specifically designed for high pressures and a ORFS Hydraulic Fittings and Adaptors.

If buying our ORFS hydraulic Hose fittings (hose tails), it is a strongly recommended to also buy the N9 (90 Duro) Oil Resistant Nitrile O-rings per each hose tail you purchase.

There is free shipping on this item if 5 or more O rings are Purchased

A new O-ring is essential when replacing a hydraulic hose with ORFS threads to prevent high pressure Oil leaks: These O-rings fit into the circular shallow machine groove in the matching threaded male fittings or adaptors.

It is recommended you use calipers or verniers to achieve a precise measurement.

Order O rings based on the following Male thread outside diameters
From the list below shown in Inches" and mm
It is recommended you use Calipers / Verniers to achieve a precise measurement.

• ORFS 9/16" (09) = 14.2mm
• ORFS 11/16 (11) = 17.4 mm
• ORFS 13/16 (13) = 20.6 mm
• ORFS 1" (16) = 25.4 mm
• ORFS 1-3/16" (19) = 30.1 mm
• ORFS 1-7/16" (23) = 36.5 mm

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