The 7/8"-14 threaded adapter fittings are compatible with 10AN ORB (O-ring boss) ports. Because the threads on these fittings are not used for sealing, PTFE paste or thread sealant is not required. The FKM O-ring should be lubricated with engine oil.
ORB ports are an industry standard and found on many automotive plumbing products, including most Radium products. All fittings include FKM O-rings.
ORB ports are an industry standard and found on many automotive plumbing products, including most Radium products. All fittings include FKM O-rings.
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![](data:image/svg+xml;charset=utf-8,<svg height="200px" width="300px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)