Safety chain tie down mechanism for under bed hitch mounting system

1. A tie down apparatus for securing an item to a vehicle mounted system, the tie down apparatus comprising:

a locking member having a body with a flattened bottom portion and a threaded post extending downward from the body beyond the flattened bottom portion;

a receiving member having an upper rim, at least one sidewall extending downward from the upper rim and further defining a first portion of an aperture, and a bottom portion;

wherein the upper rim further comprises an inner facing surface defining a second portion of the aperture, which receives the threaded post; and

wherein at least a portion of the second portion of the aperture includes corresponding threads.

2. The tie down apparatus of claim 1 wherein the bottom portion further defines the aperture.

3. The tie down apparatus of claim 1 wherein the receiving member is integrally formed.

4. The tie down apparatus of claim 1 wherein only a portion of the threaded post engages the corresponding threads of the receiving member.

5. The tie down apparatus of claim 1 wherein the locking member includes a handle attached to and extending upward from the body.

6. The tie down apparatus of claim 5 wherein the handle forms an L shape.

7. The tie down apparatus of claim 5 wherein the handle attaches to the body at two separate points.

8. The tie down apparatus of claim 5 wherein the handle is integrally formed with the body.

9. A tie down apparatus for securing an item to a vehicle mounted system, the apparatus comprising:

a removable post;

a receiving member having an upper rim, at least one sidewall extending downward from the upper rim, and a bottom portion;

wherein the upper rim and the at least one sidewall define a receiving member aperture which receives the removable post so as to secure the removable post to the receiving member; and

wherein the removable post includes at least one aperture and at least one locking ball and the removable post has a flattened top portion with a larger diameter than a diameter of the receiving member aperture.

10. The tie down apparatus of claim 9 wherein the removable post has a narrowing T-shape.

11. The tie down apparatus of claim 10 wherein the removable post wedgingly engages the receiving member to secure the locking member to the receiving member.

12. The tie down apparatus of claim 11 wherein the removable post is part of a trapped subassembly, the trapped subassembly having a plurality of wedge members.

13. The tie down apparatus of claim 12 wherein trapped subassembly comprises a tabbed portion which engages the receiving member.

14. The tie down apparatus of claim 10 further comprising a plurality of wedge members removably positioned between a narrowing portion of the removable post, an inner facing surface of the receiving member aperture, and an inner facing surface of the receiving member aperture.

15. The tie down apparatus of claim 10 wherein at least one wedge member a tabbed portion proximate to the narrowing portion of the removable post.

16. The tie down apparatus of claim 15 wherein the tabbed portion is biased.

17. A tie down apparatus for securing an item to a vehicle mounting system, the apparatus comprising:

a tie down member comprising a body and a handle, the body comprising an aperture;

at least one wedge member insertable through the aperture; and

a locking member insertable through the aperture, the locking member comprising a post, the post being engageable with the at least one wedge member, wherein the post has a narrowing T-shape as it extends from the body of the tie down member, wherein the handle attaches to the body at only two separate points.