Northern Radiator will be closed on Monday, May 27th in observance of Memorial Day.
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GM Aluminum Adapter - 1/2 NPT x 20mm O-Ring
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For adapting GM high performance radiator oil cooler lines to 1/2" NPT male to 20mm female O-ring fittings.
For smaller adapter (1/2 NPT x 3/4-18 UNS O-ring) see Z50610
