Fastening element

Details Fastening element Fastening element

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 33/02 (2006.01) E04B 1/41 (2006.01) F16B 25/00 (2006.01) F16B 25/04 (2006.01)

Patent

CA 2639114

A fastening element has a shaft (12), and a tapping thread (21) carried by the shaft (12) and having at least one screw thread (22, 42) a section (23; 43) of which that adjoins the thread pilot (35), having a plurality of following one another steps (24, 25, 26, 27; 44, 45, 46, 47) having different cross- sections, with a cross-section of the at least one screw thread (22; 42) decreasing stepwise toward the thread pilot (35) from a thread step (24, 25, 26, 27; 44, 45, 46, 47) to a thread step (24, 25, 26, 27; 44, 45, 46, 47), with the thread steps (24, 25, 26, 27; 44, 45, 46, 47) having respective cutting edge-forming end surfaces (28, 29, 30, 31; 48, 49, 50, 51) aligned, at least partially, in a direction of the thread pilot (35).

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