A self-tapping screw for use in securing at least two materials together. The self-tapping screw may include a screw cap that receives a screw body to reinforce the strength of the screw head. The screw cap is composed of a zinc-aluminum alloy that may be die casted and provides additional strength and hardness to the attached screw body. The screw cap has a rolled flange that helps to securely retain the flat rim of the attached screw body.

A fastener may include an elongated shank, a head at a distal end of the shank, and a drill point at a terminal end of the shank, which is opposite to the distal end. The fastener may include a primary thread starting at the drill point and extending along the shank towards the head. The fastener may include a secondary thread starting at the drill point, extending along the shank towards the head, and stopping in an axial direction before the primary thread ends. The secondary thread may be radially located 180 degrees from the primary thread. The drill point may include a plurality of radially extending cutting edges and one or more relieved flute portion extending along the surface of the drill point.

Systems and methods for thermal washers are described herein. A thermal washer may comprise a first metallic plate having a first inner surface and a first outer surface, a second metallic plate having a second inner surface and a second outer surface, the second metallic plate being oriented substantially parallel to the first metallic plate such that the first inner surface and the second inner surface are separated by a gap, and a thermal wool in contact with the first inner surface and the second inner surface, the thermal wool filling a void between the first inner surface and the second inner surface. A width of the thermal wool may be substantially equal to a width of the first metallic plate and a length of the thermal wool may be substantially equal to a length of the first metallic plate.

Systems and methods for thermal seals are described herein. A thermal seal may comprise a first metallic plate having a first inner surface and a first outer surface, a second metallic plate having a second inner surface and a second outer surface, the second metallic plate being oriented substantially parallel to the first metallic plate such that the first inner surface and the second inner surface are separated by a gap, and a thermal wool having a plate portion in contact with the first inner surface and the second inner surface, the plate portion filling a void between the first inner surface and the second inner surface, and having a shoulder portion extending from a perimeter of the plate portion, the shoulder portion extending outward from between the first metallic plate and the second metallic plate.

A roof mount assembly mounts a structure to a roof haying a rafter and a substrate supported by the rafter. The roof mount assembly includes a piece of flashing positioned on the substrate. The flashing includes a first surface, a second surface opposite the first surface and an aperture extending through the flashing. A fastener extends through the flashing aperture. A bracket is connected to the flashing via the fastener, and the bracket is sized to support at least one roof mounted structure on the roof. A seal is positioned between the flashing aperture and the fastener. The seal is sized to form a water-tight seal with the aperture to inhibit flow of fluid through the aperture. The seal includes a first portion and a second portion, in which the first portion is positioned to abut the flashing first surface and the second portion is positioned to extend through the aperture.

In combination with a pipe (213), a clamp (201) is provided which supports the pipe in a fixed position with respect to a substrate. The clamp includes first (203) and second (205) bands, wherein each of the first and second bands has an arcuate portion (209) and first and second terminal portions (211), and wherein the arcuate portions of the first and second bands are disposed in opposing relation around the surface of the pipe. A first fastener (207) extends through the first terminal portions of the first and second bands, and a second fastener extends through the second terminal portions of the first and second bands. A thermal insulator (233) is disposed between the first fastener and the first terminal portions of the first and second bands, and between the second fastener and the second terminal portions of the first and second bands.

Inserts disposed in a housing of a pneumatically or hydraulically powered tool having a motor adapted to rotate a drive lug in either of first and second rotational directions. The insert is composed of a material resistive to creep and/or stress relaxation. The insert contacts fasteners applying a clamping force to the tool and remove the housing from the load path of the clamping force, thereby reducing the possibility of fluid leaks.

An improved clamping mechanism to secure a tire between a bead ring and a wheel utilizing a bolt. The bolt has a ball seat that pivots within an enlarged pilot hole in the bead ring as the bolt threads engage in threaded section of the wheel, pulling the bead ring toward the wheel, eventually leveraging off a fulcrum on either the bead ring or wheel against the tire bead bundle and pressing down the tire bead to lock it in place against the wheel. As the bead ring can pivot within the enlarged pilot hole around the bolt, the bolt is not stressed. Further, the wheel comprising a safety bead and non-skid coating on the inner wall of the wheel to prevent the wheel sliding around the wheel.

A locking device adapted to lock a shell to an installation body includes a thread connection member extending through a connecting hole in the shell and engaging a threaded hole in the installation body, a sealing ring sleeved on the thread connection member and adapted to be pressed on an installation surface of the shell to seal the connecting hole of the shell, and a gasket sleeved on the thread connection member and adapted to be pressed between the thread connection member and the sealing ring to prevent the thread connection member from being loosened. The gasket has a pair of stopping arms. An angle defined between the stopping arms is greater than 0 degrees and less than 180 degrees. A pair of top ends of the stopping arms are adapted to simultaneously abut against an outer wall of the shell to prevent the gasket from rotating with the thread connection member.

A fastener sleeve is described, including a collating sleeve body and a plurality of cylindrical sheaths in the collating sleeve body, each cylindrical sheath engageable with a fastener. A sheathing panel is also described, including at least one barrier overlay secured to a panel, a plurality of fasteners engaged in the barrier overlay and the panel, a plurality of sealing cylindrical sheaths surrounding a portion of each fastener and positioned between the fastener and the barrier overlay, such that the sheathing panel has at least one of the following properties: a water vapor transmission rate of at least 7.0 grams/m.sup.2/24 hours at 73° F. and 50% relative humidity (RH), a water vapor permeance of at least 1.3 perms at 73° F. and 50% RH, or an air infiltration rate of less than 0.2 L/s-m.sup.2 at 75 pascals. A method of engaging the fasteners with the panel is also provided.