Friday, February 18, 2011

Aircraft Fasteners

The word FASTENER is used to describe all of the various types of fastening device used in the construction of an aeroplane. This is because the meanings of the words BOLT and SCREW for example, may be interpreted differently by separate organisations.

A bolt is an externally threaded fastener designed for insertion through holes in the assembled parts. Bolts usually have a plain (unthreaded) portion on the shank. A bolt is normally intended to be tightened or released by turning or torquing the nut.
 A screw is an externally threaded fastener capable of being screwed into preformed threads in the assembled parts. It is normally intended to be tightened or released by turning or torquing the head. A screw has a fully threaded shank. Certain types of screw such as self tapping screws and woodscrews form a thread when they are screwed into place.

A standard fastener comprises of a threaded portion, a head and sometimes a plain shank or grip.  Between the shank and the thread is a small tapered transition zone.  Between the shank and the head is stress relieving fillet radius.
A fastener will be defined by a number of features which are given in detail in it’s specification.  These include it’s Thread Form, Shank Diameter, Head Style, Grip Length, Material, Surface Finish and Locking Facilities.

5 comments:

William said...

Thank for going through all that we have got to do a project identifying all the important components in manufacturing i have picked quick release fasteners so your blog has really been helpful.

Stew said...

The key to every aerospace hardware fastener is how it is bolted and drilled into microspecification per single piece. A single crack that deteriorates over time can spell disaster and hundreds of lives in danger.

Suchita Singh said...

Thank for sharing this nice information.
aviation technology solutions

Kapil Aggarwal said...

Thanks for sharing such a nice information with us about threaded fasteners. Keep writing and posting more on this topic.

Manju nath said...

nice post Yasantha Pathirana .thanks for sharing valuable information about fasteners.keep posting .

Post a Comment