Fastener assembly

1 . A stud comprising:

a) a first end and a second end;

b) a torque transferring structure located at the first end; and

c) a shaft provided with an axis and including a threaded surface that is provided with a locking thread and a curved thread that is configured to prevent cross-threading.

2 . A stud according to claim 1 , wherein the lock thread is provided with a root surface that is angled relative to the axis of the shaft.

3 . A stud according to claim 1 , wherein the locking thread is provided with a root surface that is at an angled between four and eight degrees relative to the axis of the shaft.

4 . A stud according to claim 1 , wherein at least one curved thread is located between a Vee shaped thread and the second end of the stud.

5 . A stud according to claim 1 , wherein the curved thread includes a curved surface located between a first side and a second side.

6 . A stud according to claim 1 , wherein the curved thread includes a curved surface located between a first side that is curved and a second side that is curved.

7 . A stud according to claim 1 , wherein the shaft is provided with a trilobular shape.

8 . A stud according to claim 1 , further comprising a head located at the first end, wherein the head is provided with the torque transferring structure.

9 . A stud according to claim 1 , further comprising a head located at the first end, wherein the head is provided with the torque transferring structure and an underside that includes a plurality of protrusions.

10 . A stud according to claim 1 , wherein the shaft includes a stainless steel.

11 . A stud according to claim 1 , further comprising:

a) a nut body rotatable about the axis of the shaft;

b) an annular surface on the nut body provided with a plurality of inclined faces oriented circumferentially forming portions of an undulating annular surface; and

c) a washer body rotatable relative to the nut body and provided with a bearing surface and a clamping surface, wherein the clamping surface includes a plurality of protrusions and the bearing surface is axially opposed to the annular surface on the nut body and provided with a plurality of inclined faces oriented circumferentially and forming portions of an undulating bearing surface.

12 . A stud comprising:

a) a first end and a second end;

b) a torque transferring structure located at the first end; and

c) a shaft provided with an axis and including a threaded surface that is provided with a locking thread and a guide thread that is configured to prevent cross-threading.

13 . A stud according to claim 12 , wherein the lock thread is provided with a root surface that is angled relative to the axis of the shaft.

14 . A stud according to claim 12 , wherein the locking thread is provided with a root surface that is at an angled between four and eight degrees relative to the axis of the shaft.

15 . A stud according to claim 12 , wherein at least one guide thread is located between a Vee shaped thread and the second end of the stud.

16 . A stud according to claim 12 , wherein the guide thread is provided with a reduced diameter relative to a Vee shaped thread.

17 . A stud according to claim 12 , wherein the guide thread is located adjacent to a plateau thread.

18 . A stud according to claim 12 , wherein the guide thread is located adjacent to a plateau thread that is provided with a ramped cross-sectional profile.

19 . A stud according to claim 12 , wherein the shaft is provided with a trilobular shape.

20 . A stud according to claim 12 , further comprising a head located at the first end, wherein the head is provided with the torque transferring structure.

21 . A stud according to claim 12 , further comprising a head located at the first end, wherein the head is provided with the torque transferring structure and an underside that includes a plurality of protrusions.

22 . A stud according to claim 12 , wherein the shaft includes a stainless steel.

23 . A stud according to claim 12 , further comprising:

a) a nut body rotatable about the axis of the shaft;

b) an annular surface on the nut body provided with a plurality of inclined faces oriented circumferentially forming portions of an undulating annular surface; and

c) a washer body rotatable relative to the nut body and provided with a bearing surface and a clamping surface, wherein the clamping surface includes a plurality of protrusions and the bearing surface is axially opposed to the annular surface on the nut body and provided with a plurality of inclined faces oriented circumferentially and forming portions of an undulating bearing surface.