A tube fitting includes: a zinc-based plated layer; and a resin coating layer that is positioned at an outermost surface at an outer side of the zinc-based plated layer and includes a polyethylene substance, a lubricant, and solid particles. When a fitting average plating thickness t relating to the thickness of the zinc-based plated layer is defined, 2.1<t<19.7 is true.

A wheel fastener and method of forming a wheel fastener is provided. The wheel fastener has a fastener body with a threaded portion, a wrenching portion and a spherical load-bearing portion is configured to mate with a fastener seat on a wheel, where the spherical radius is in the range of 13.9 mm to 14.0 mm. The fastener also includes a multi-layer coating is applied to the fastener body, the multi-layer coating having a friction topcoat with a coefficient of friction in the range of 0.10 to 0.20. The fastener also includes a cap secured on the wrenching portion and defining a wrenching surface.

A wheel fastener and method of forming a wheel fastener is provided. The wheel fastener has a fastener body with a threaded portion, a wrenching portion and a spherical load-bearing portion is configured to mate with a fastener seat on a wheel, where the spherical radius is in the range of 13.9 mm to 14.0 mm. The fastener also includes a multi-layer coating is applied to the fastener body, the multi-layer coating having a friction topcoat with a coefficient of friction in the range of 0.10 to 0.20. The fastener also includes a cap secured on the wrenching portion and defining a wrenching surface.

A mechanical fastener system for EME protection, including at least one plated component, wherein the at least one plated component includes a base material, a bonding layer disposed over the base material, and a metal plating disposed over the bonding layer.

A mechanical fastener system for EME protection, including at least one plated component, wherein the at least one plated component includes a base material, a bonding layer disposed over the base material, and a metal plating disposed over the bonding layer.

The invention relates to a method for producing a screw, having the following steps: (a) rolling a screw wire made of low-alloy carbon steel to produce screw (10) having a thread; (b) heating the entire screw (10) to an austenitizing temperature under a carbon atmosphere and/or nitrogen atmosphere and maintaining the temperature; (c) quenching the entire screw (10) to a bainitizing temperature and maintaining the bainitizing temperature until the screw has a bainitic structure over its cross-section. The invention is characterized in that the screw (10) is subsequently hardened locally at its tip (22), by the tip (22) being heated to an austenitizing temperature and the screw (10) being subsequently quenched to a temperature below the martensite starting temperature (MS).

Self-sealing fasteners and associated building panels, systems, and methods are provided. In one aspect, a fastener includes an elongated fastener body with an external surface extending between the first end and the second end, and a coating material disposed on at least a portion the external surface. In another aspect, a fastener includes an elongated fastener body with an external surface extending between the first end and the second end, and a polymer annulus surrounding at least a portion of the external surface of the of the elongated fastener body at or adjacent the head of the fastener.

An article is disclosed that includes a first substrate of a first metal or metal alloy. An aluminum alloy first layer on a surface of the first substrate includes is galvanically less noble than the first metal or metal alloy. The first layer can also include elements alloyed with or in solid solution with the aluminum alloy, or can include a two or more phase composition including a first phase of aluminum and a second phase of a solid lubricant.

An article is disclosed that includes a first substrate of a first metal or metal alloy. An aluminum alloy first layer on a surface of the first substrate includes is galvanically less noble than the first metal or metal alloy. The first layer can also include elements alloyed with or in solid solution with the aluminum alloy, or can include a two or more phase composition including a first phase of aluminum and a second phase of a solid lubricant.

A steel wire for high-strength bolts is used for a non heat-treatment bolt with an excellent cold forgeability for which quenching and tempering steps have been omitted after bolt formation, and which has a tensile strength of 1200 MPa or more and an excellent delayed fracture resistance. The steel wire includes C, Si, Mn, P, S, Cr, Al, N, and B, at least one selected from the group consisting of Ti, V, and Nb with the balance consisting of iron and inevitable impurities. The steel wire has a microstructure wherein ferrite and perlite have a total area rate of 98% or more, perlite lamellar spacing is 250 nm or less, and an area rate of the perlite is more than 40%, and 80% or less. The steel wire has a tensile strength of 1300 MPa or less.