----- Original Message ----- From: <kam544@flash.net> To: <pianotech@ptg.org> Sent: September 22, 2001 10:40 AM Subject: Re: Bolt strength > What I found particularly interesting was the word, capscrew, and its > definition: > > "... Put mildly a bolt is a metal rod that has a head at one end and a > screw thread at the other. The bolt is passed through the parts to be > joined then the nut is installed and drawn up thus holding the parts > together. A capscrew is, basically, a bolt without a nut. In other words it > screws into a prethreaded mating part like an engine block or similar > casting. Capscrews might hold an accessory like a water pump to the engine > block while a bolt and nut can be used for holding an alternator to the > adjusting plate. They are both fasteners..." > -------------------------------------------------------------- Hmm? This makes it sound as if the cap screw was a stud--i.e., without a head. I don't recall the precise definition of a cap screw, but in practice it is any machine screw with a cap not having a hex shape. This includes flat head, oval head and round head machine screws as well as a whole family of socket head cap screws such as the so-called Allen (with a hexagon socket), spline socket, square socket and a whole bunch of new ones.. Del
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