A hardware apparatus includes a washer/nut member comprising a disc-shaped base plate with a nut-shaped projection extending therefrom, wherein the nut-shaped projection includes a through passage to the disc-shaped base plate and the disc-shaped base plate includes a through opening aligned with the through passage. An insert is positionable within the through passage of the nut-shaped projection, the insert including a disc-shaped flange, a projection at one side of the flange, and a passage through the flange and the projection, wherein the projection is engageable in the through opening, wherein a perimeter shape of the projection is configured to cooperate with a perimeter shape of the through opening to prevent rotation of the insert relative to the washer/nut member.

Fasteners, drivers, punches, fastener systems, and methods of making fasteners, drivers, punches, and fastener systems are disclosed herein. The fasteners, drivers, punches, and fastener systems include, in one example, stabilizing ribs and corresponding recesses.

The present invention relates to a drive element (8) which has an internal driving profile (9) that defines a profile axis (P.sub.I) and has, on its inner side, a plurality of concave drive faces (6) arranged in a manner distributed regularly around the profile axis (P.sub.I), between which a planar or convexly curved transitional faces (7a) are provided, or which has an external driving profile (9) that defines a profile axis (P.sub.A) and has, on its outer side, a plurality of concave drive faces (10) arranged in a manner distributed regularly around the profile axis (P.sub.A), between which planar of convexly curved transitional faces (7a) are provided.

Various embodiments described herein provide a fastener system having straight walled driving surfaces that provides a reliable stick fit feature, while also improving stability of engagement between the system components. A feature of the new system is to allow stick fit engagement of existing standard straight walled drivers in the new system.

A threaded fastener system including a female threaded part and a male threaded dual driven fastener. The dual driven fastener has a shaft having a longitudinal axis, a portion of the shaft having a male threaded feature that engages the female threaded part. The male threaded feature having a major thread diameter and a minor thread diameter. There is a first driving feature at a first end of the shaft that is larger than the major thread diameter relative to the longitudinal axis and a second driving feature at a second end of the shaft that is equal to or smaller than the minor thread diameter. The driving features allow torquing of the dual driven fastener from either end.

A T-Nut comprising a tubular body attached to a flanged head is provided. The tubular body includes a bottom portion of constant diameter and an upper neck portion with a neck diameter that gradually increases as it approaches the flange head. Additionally, the bottom surface of flange head of the T-Nut may be recessed inwardly towards the top surface of the flange head to create circumferential concave cavity underneath the flange head, which will allow the flange head to envelope any portions of a washer or casing that may be above the surface of the material being joined.

A wall fastener assembly for use with a building wall system, with the wall fastener assembly including a fastener and an elongated, semi-rigid seal member. The fastener includes a shaft and a head, with the fastener configured to be secured to the wall system. The seal member includes opposed first and second ends, and a center bore that extends along the length of the seal member and is configured to receive the shaft of fastener. When the fastener is secured to the wall system the first end of the seal member is configured to compress against a portion of the wall system to form a first seal and the opposite second end of the seal member is configured to form a second seal to thereby seal the wall fastener assembly against the wall system.

A locking element is configured to be used with a polyaxial bone anchor. The locking element including a central axis, a bottom side, a top side opposite to the bottom side, and a peripheral surface portion that extending completely around the locking element that has an external thread. The bottom side defines a first recess facing toward the bottom side for accommodating and applying a force in a direction toward the bottom side to at least the portion of the head of the polyaxial bone anchor. The top side defines a second recess having a non-circular cross-section in a plane perpendicular to the central axis for torqueable engagement with a driver.

A bolt includes a head portion on which a recess is formed. The recess has a bottom surface and a sidewall extending from a periphery of the bottom surface. The sidewall has a lower end defined by the bottom surface and includes an increased diameter portion and a reduced diameter portion. The increased diameter portion has an inner diameter larger than an inner diameter of the lower end of the side wall. The reduced diameter portion has an inner diameter smaller than the inner diameter of the increased diameter portion. The reduced diameter portion is located opposite to the bottom surface across the increased diameter portion.

A bolt includes a head portion on which a recess is formed. The recess has a bottom surface and a sidewall extending from a periphery of the bottom surface. The sidewall has a lower end defined by the bottom surface and includes an increased diameter portion and a reduced diameter portion. The increased diameter portion has an inner diameter larger than an inner diameter of the lower end of the side wall. The reduced diameter portion has an inner diameter smaller than the inner diameter of the increased diameter portion. The reduced diameter portion is located opposite to the bottom surface across the increased diameter portion.