Fatigue performance collars and lockbolt construction

Details Fatigue performance collars and lockbolt construction Fatigue performance collars and lockbolt construction

F - Mech Eng,Light,Heat,Weapons

16

B

85/139

F16B 21/00 (2006.01) F16B 19/05 (2006.01)

Patent

CA 1122828

ABSTRACT OF THE DISCLOSURE An aircraft fastener element, as a collar or nut, designed and constructed to produce improved fatigue performance in low shear transfer joints. The improved collar or nut has a bearing surface which abuts against the adjacent surface of the workpiece aperture in an initial predetermined area so that when the collar is swaged or the nut tightened and compressed the initial annular base is flattened to no more than approximately 1.25 D (D being the internal diameter of the nut or collar). csm/

323460

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