Nut and a method of use of the nut in a fastener system for crane mats
A nut to be used as part of a fastener to be used in multiple ways in various industries or methods has a drive mechanism and stud extending from the drive mechanism with a threaded bore. In addition the nut can be specifically used as a method and as part of special fastener that can be used to join cut, hard-wood members, other naturally occurring manufactured mat members or synthetically man made members, referred to as “timber(s)” or “laminated”, in forming a mat used for heavy construction equipment to run on over ground which is not stable. These mats are commonly referred to as “Crane Mats” or “Laminated Mats” in the construction, mining, pipeline, and oil and gas industries among others.
1. A nut comprising:
(a) a head disposed at a first end of the nut with a drive, the drive including an externally facing six-sided surface having six flats joined by six edges for external engagement by a socket or wrench, the head having a flat top surface and a rounded shoulder transitioning into the six-sided surface such that an upper edge of the six flats facing the first end are arched where the flats transition blend into the rounded shoulder;
(b) a stud extending from a bottom side of the head to an opposite second end of the nut, the stud having an internally threaded bore that extends from the second end toward the first end, the bore having a tapered mouth at the second end that is progressively larger than the diameter of the threaded bore; and
(c) a pass-through aligned with the center of the threaded bore and extending through the flat top surface of the head, the pass-through having an internal diameter opening capable of receiving a member that threads into the threaded bore.
2. The nut as recited in claim 1 including an integral flat bearing surface under the head incorporated within the head.
3. The nut as recited in claim 1 including a connection between the stud and the head in which it is reinforced with additional material in order to allow for more torque to be placed on the drive without the head detaching from the stud, the connection including an integral washer portion that has an outer perimeter having a diameter that is larger than an effective outer diameter of the six edges of the head and wherein the effective outer diameter of the head is larger than an outer diameter of the stud, and including a tapered enlargement between the stud and an underside of the washer portion.