Those are commonly known as Dzus Fasteners. You'll find them under that brand name in the aircraft catalogs.
-Jeff Scott ________________________________ From: Mark Langford <m...@n56ml.com> To: KRnet <kr...@mylist.net> Sent: Sunday, April 8, 2012 9:40 PM Subject: KR> what kind of fasterner is this? Can anybody tell me what kind of fastener this is at http://www.n56ml.com/misc/120408_051m.jpg ? It looks familiar, but I can't come up with exactly what it is. This is a view of the back side of the quarter turn spring, and the stud (on the right) has had it's head ground off to a nub. Thanks, Mark Langford ML at N56ML.com website at http://www.N56ML.com --------------------------------------------------------