Faying surface explained

A faying surface is one of the surfaces that are in contact at a joint.^{[1] [2]}

Faying surfaces may be connected to each other by bolts or rivets, adhesives, welding, or soldering. An example would be steel pipe flanges, in which the connected ends of the flanges would be faying surfaces.

References

http://www.eaa1000.av.org/technicl/corrosion/faysurf.htm

Notes and References

1. Web site: Faying surface. Webster's Revised Unabridged Dictionary. S.v.. 7 November 2013.
2. News: Faying Surface definition in Wiktionary. 8 November 2013.