* DoN. Nichols
P.S. Out of curiosity -- now that you have images, what is the term
for them in Norway?

Have now found out. Some call it "kuppelmutter" i.e. "domed nut" and
some "hettemutter" or "hooded nut".

--
Jon Haugsand
Dept. of Informatics, Univ. of Oslo, Norway,
http://www.ifi.uio.no/~jonhaug/, Phone: +47 22 85 24 92