The present disclosure concerns a powder fastener retention material for application to metal sub-miniature fasteners formulated from a nylon 11 powder having a median average particle size by volume of more than 67 and less than 80 micrometers, a metal sub-miniature fastener having a patch of the reusable fastener retention material, a method for forming a patch of the fastener retention material on a metal sub-miniature fastener, a method of forming a reusable fastener retention patch on a region of a metal sub-miniature fastener, and a kit of parts comprising (a) a metal sub-miniature fastener, and (b) a powder retention material powder.

A fastener includes an elongated shaft having a first end, a second end, and a shaft body, a head portion, and a threaded portion. At least one inner feed channel extends through the head portion and the shaft body and terminates proximal to the threaded portion. The fastener has a plurality of flutes formed along and circumferentially spaced around an outer surface of the shaft body and an outer surface of the head portion. Each flute has a first end and extends from a first location proximal to the threaded portion, along the outer surface of the shaft body, and radially outward along the outer surface of the head portion. The fastener further has one or more lateral feed channels formed laterally through the shaft body and connecting the inner feed channel to at least two opposing flutes on the outer surface of the shaft body.

In one aspect the invention provides a nut and tie rod assembly which includes a composite material tie rod defining a main shaft with an exterior surface. The tie rod is formed from reinforcing fibers encapsulated within a matrix material, and at least a portion of the exterior surface of the shaft defines an engagement structure. The assembly also includes at least one nut which includes an internal cavity with an interior surface defining an engagement structure which is complimentary to the engagement structure defined on the exterior surface of the shaft of the tie rod.

A liquid sealant applicator system that may include a liquid sealant applicator having a coupling to reversibly connect to a source of liquid sealant, a sidewall extending from the coupling and defining a sealant flow path, a flow restrictor that restricts the sealant flow path to an annular pattern of apertures in the flow restrictor, a porous matrix that fills at least a portion of the sealant flow path downstream of the flow restrictor, a matrix retainer configured to retain the porous matrix within the sealant flow path, and a fastener socket connected to the sidewall and having a distal end configured to be placed over and at least substantially enclose the head of a preselected fastener. The applicator is configured to provide a uniform application of sealant from the source of the liquid sealant to the head of the fastener enclosed by the fastener socket.

The invention relates to a method for the tamper-evident and traceable marking of an assembly of a first element and a second element, the marking method comprising steps of assembling the first element and the second element, placing a radio tag marker on a first surface of the first element, the first surface being facing a second surface of the second element, and applying a first layer of locking varnish to a third surface, the third surface comprising the first surface and the second surface, in order to cover the marker, the first layer of locking varnish, once dried, guaranteeing that the marking is tamper-evident and the radio tag marker affording tracing of the marking.

A structure, which enhances the embedding and fixing strength between the concrete and the extending component embedded inside the concrete, includes: the external surface of the shaft part having an integrally formed protruding structure; the center of the shaft part having a central channel; the top end of the central channel communicating with the hole of the tip end, on both sides of the central channel; a plurality of transverse holes communicating with the central channel and configured from top to bottom; and the transverse holes distributed between one protruding structure and another.

A connector is disclosed for use in forming a joint between a first surface and a second surface. The connector comprises a housing. The connector also comprises a tendon. A portion of the tendon can protrude from the housing through a seal. The seal is configured to sealably cover an open end of the housing such that the tendon can move through the seal and laterally sideways across the open end together with at least a portion of the seal. Also disclosed is a connector system for use in forming a joint, and a method of installing a connector to form a joint, between a first surface and a second surface. The connector system and method comprises and makes use of the housing and the tendon.

A fastener for improved electrical contact with a composite structure and improved distribution of electric current to the composite structure. The fastener includes an elongated shaft having a first end with a head portion, a second end with a threaded portion, and a shaft body therebetween. At least one feed channel extends from an opening at the threaded portion, through the shaft body, and terminates proximal to the head portion. The shaft body radially expands upon pressure injection of a resin filler into the feed channel, when the fastener is installed in a corresponding fastener hole formed in the composite structure. Upon radially expanding, the outer surface of the shaft body makes contact with an inner hole surface of the corresponding fastener hole, resulting in the fastener providing electrical contact with the composite structure and providing distribution of electric current.

An applicator (200) for applying a material (104) over a fastener head (112), protruding from a non-horizontal surface (116) of a part (114), comprises an enclosure (210) and a daubing lever (220). The daubing lever (220) passes through the wall (213) of the enclosure (210) and is movably coupled to the enclosure (210). The daubing lever (220) comprises an actuation end (222a), located on the outer side (216) of the wall (213) of the enclosure (210), a working end (222b), located opposite the actuation end (222a) on the inner side (214) of the wall (213) of the enclosure (210), and an abutment portion (228), located at one of the actuation end (222a), the working end (222b), or between the actuation end (222a) and the working end (222b). The applicator (200) further comprises means (240) for imparting a moment on the daubing lever (220) to bias the abutment portion (228) of the daubing lever (220) toward the enclosure (210).

A detaching method of a filling member and the filling member to be used therein are provided, in which the filling member loaded in a space of a counterbore hole or a hole of a bolt head may be detached easily if required to remove a bolt, a prepared hole is made in the filling member by means of a drill, and female threads are formed in the filling member by a tapping process, and an extracting force is applied to the filling member by way of the female threads engaged with a rotating tap, so that the filling member can be pulled out of the space of the counterbore hole.