Abstract: A fastener is formed of an axially extending shaft (2) and a driving head on the end directed away from the setting direction, and has on its underside or first side (9) for the prevention of unintended loosening, a plurality of webs (12) extending radially from the longitudinal axis (L) of the shaft up to the external periphery (11) of the underside (9). The webs (12) having a substantially trapezoidal cross-section, are limited by a face surface (13) on the underside (9), extending between two flank surfaces.

Abstract: In a plastic injection anchoring sleeve having an essentially cylindrical sleeve body with a closed front end and an open opposite end for the insertion of an anchoring bolt, the sleeve wall has a plurality of openings closed by flaps which are formed integrally with the sleeve and pivotally supported thereby at their front ends, the flaps being provided with axially extending ribs projecting radially inwardly and having inclined front and rear end portions forming ramps for lifting the flaps outwardly and out of the openings when the sleeve body is removed axially from a molding core after injection molding, or when an anchor bolt is inserted into the sleeve body.

Abstract: An improved fastener for boarding, particularly to a fastener adopted for use on fragile boards and panels such as gypsum boards mainly comprises a shank, a flange formed on one end of the shank, a drill bit formed on another end of the shank, a screw thread section formed on the peripheral surface of the shank and a center hole formed in the center of the shank for accommodating a screw nail. The shank has at least two debris troughs. Each debris trough is extended diagonally from a blade nib of the drill bit to a front section of the screw thread section. The debris troughs have a through hole formed on a rear section.

Abstract: The present invention provides a novel fastener having a tamper indicating tool engaging drive head. The fastener has a shank including a threaded shank portion. The fastener also has a double-headed driving portion that is integrally formed with the shank. The double-headed portion includes an outer head for driving the fastener into a work piece or nut and an inner head for removing the fastener from an assembly. The inner head is joined to the outer head such that the inner head is positioned between the outer head and the shank. Extending portions extend from tool engaging surfaces of the inner head. In use, the fastener is driven into an assembly via a proper tool that engages with the outer head. The outer head shears off the fastener when the desired torque is achieved, leaving only the shank within the assembly and the inner head exposed.

Abstract: An improved, process compatible fastener is especially useful for securing a member, such as a wafer clamp ring, to an assembly for use in a process environment. The fastener is of a simple design, such that it is readily manufactured, and such that it is not a source of contamination. In particular, an integrated fastener includes both a metal fastener and a cone shaped metal lock washer within a single fastener assembly, such that a single fastener is used for accomplish the function of a screw and a washer. All surfaces of the fastener that are exposed within the process environment are encapsulated in a process compatible material. In this way, the fastener may be secured in the process environment in a single operation without leaving any gaps or partially exposed surfaces that may introduce contaminants into the process environment, such that the integrated fastener also provides the function of a process compatible cap.

Abstract: A self-tapping screw has a thread shaft having a leading end, a wood screw thread provided on the thread shaft and having a plurality of turns, and milling profiles formed on the turns of the wood screw thread and spaced from one another in an axial direction, the milling profiles becoming smaller the further away the milling profiles are from the leading end, some thread turns at a head end of the thread shaft being free of milling profiles.

Abstract: An anchor fitting assembly for securing objects on an elongated track. The track is of the type commonly used in aircraft and in various vehicles to secure seats, wheelchairs, cargo and other objects. The track has an elongated groove which has a bell-shaped profile. The top of the groove is open and has a series of opposed tabs and semicircular faces. There are many styles of fittings which are placed in such tracks and secured to the tracks. The anchor fitting assembly of the present invention has a securable fitting which has a flared based held beneath the opposed tabs of the groove. The fitting is prevented from sliding along the track by a pair of buttons which are inserted downwardly into two opposed semicircular openings adjacent the securable fitting. When an object is screwed onto the securable fitting it holds down the buttons preventing them from coming out of the semicircular openings.