Abstract: A two-piece sheet metal nail (10) comprising a one-piece shank portion (12) and a one-piece head portion (14) which may be quickly and manually assembled without the requirement for specialized tools is provided. The shank portion (12) includes a pair of oppositely extending wing members (32 and 34) adapted to cooperate with a pair of tabs (46 and 48) provided on the head portion (14) to self-lockingly assemble the shank portion (12) to the head portion (14).

Abstract: An improved, one-piece, sheet metal nail having a generally cross-sectionally V-shaped shank portion and a head portion comprising extensions of the two legs defining the generally V-shaped shank portion which are folded inwardly at substantially right angles thereto is provided. One of said shank portion extensions will overlap the other of said shank portion extensions to provide a relatively easily produced head portion having improved strength characteristics. The extensions of the shank portion legs are of sufficient length to provide a head portion of sufficiently large area for driving of the nail and/or for providing a sufficiently large bearing surface to retain the member through which the nail is driven to the member into which the nail is driven.

Abstract: An improved self-retaining one-piece fastener which provides for non-rotational, longitudinal insertion of an externally threaded fastener and prevents non-rotational, longitudinal removal thereof. The improved fastener includes means for preventing rotation of the improved fastener in a manner suitable for use in blind mounting applications and a locking portion resiliently cantilever mounted in an acute angular relationship and intersecting the axis of the externally threaded fastener.

Abstract: An improved one-piece connector clip for securing a helically grooved flexible electrical conduit within generally round apertures in a junction box is disclosed. The body of the clip comprises a plurality of generally flat sides and is provided with tabs which engage the helical groove in the conduit to prevent the conduit from being pulled out of the clip and to electrically interconnect the clip and the conduit. A collar on the inner end of the clip encloses the end of the conduit to protect the wires contained therein against any burrs which may be present on the end of the conduit. Resiliently deflectable retaining arms and flanges clampingly engage a wall of the junction box to hold the clip and conduit in place and to electrically interconnect the clip and the junction box.

Abstract: A monitor actuating device and a releasable, reusable fastener therefor is provided. The monitor actuating device is designed for attachment to a monitored article and for release therefrom only by the use of a specially designed tool. The actuating device includes a pin member, such as a headed tack or the like, extending therefrom and/or therethrough, which is designed to pierce the monitored article, such as an article of clothing or the like. The reusable fastener is selectively attachable to the free end of the pin member to capture the monitored article and/or the monitor actuating device on the pin and to prevent removal of the monitored article and/or the monitor actuating device for the pin. The reusable fastener is designed for release from the pin only upon the use of a special tool to prevent, or at least render more difficult, the unauthorized removal of the monitor actuating device from the monitored article.

Abstract: A threadless coupling for coupling a pipe to a support member or for coupling two or more sections of pipe together is provided. The coupling comprises an outer sleeve or housing and a plurality of substantially identical pipe end receiving and retaining fasteners received and retained within a bore, or bores, in the outer sleeve or housing. The fasteners may be utilized in variable numbers to provide selectively variable degrees of tensile retention of the pipe to the coupling. The fasteners are serrated to better grip the lengths of pipe and to compensate for the out-of-round conditions often found on the exterior surfaces of pipe.

Abstract: An improved self-retaining one-piece fastener which provides for non-rotational, longitudinal insertion of an externally threaded fastener and prevents non-rotational, longitudinal removal thereof. The improved fastener includes means for preventing rotation of the improved fastener in a manner suitable for use in blind mounting applications and a locking portion resiliently cantilever mounted in an acute angular relationship and intersecting the axis of the externally threaded fastener.

Abstract: A releasably attachable clip for selective attachment to an article. The clip, which may carry an alarm actuating member or the like, is easily attached to the article and is designed to be released therefrom only upon insertion of a specially configured multi-pronged tool into specially configured mating passageways provided in the body of the clip. The specially configured tool includes a multiplicity of prongs each of which must simultaneously mechanically engage one of the multiplicity of release means within the clip at the ends of the specially configured passages to achieve non-destructive disengagement of the clip from the article.