Hardware used for tightening onto a bolt or threaded shaft where quick, tool-less assembly/disassembly is required/desired. The unit has "ears" and although meant only for hand tightening, many tools have been developed to assist.
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http://shop1.mailordercentral.com/marshfasteners/prodinfo.asp?number=NWING6-32
The original or a variation is often used in the mounting of lighting equipment.
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http://www.thelightsource.com/products/10/view
View attachment 6495
http://www.whybuynew.co.uk/cables-a...ghting-g-clamp-light-effects-clamps-black.htm
A derivation, the wing screw or wing bolt; a derivation of that is the thumb screw.
View attachment 6493
http://shop1.mailordercentral.com/marshfasteners/prodinfo.asp?number=NWING6-32
The original or a variation is often used in the mounting of lighting equipment.
View attachment 6494
http://www.thelightsource.com/products/10/view
View attachment 6495
http://www.whybuynew.co.uk/cables-a...ghting-g-clamp-light-effects-clamps-black.htm
A derivation, the wing screw or wing bolt; a derivation of that is the thumb screw.