A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits that each comprise a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed in the fluid end body and the fastening system secures the retainer element to the body. The fastening system comprises a plurality of externally threaded studs, washers and nuts in some embodiments. In other embodiments, the fastening system comprises a plurality of screws.

A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits, each kit comprising a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed in the fluid end body and the fastening system secures the retainer element to the body. The fastening system comprises a plurality of externally threaded studs, washers and nuts in some embodiments. In other embodiments, the fastening system comprises a plurality of screws.

A universal control valve mounting assembly includes a crossmember traversing between opposing studs within a wall, the crossmember secured at opposing ends to the opposing studs via end brackets having apertures formed therethough. The assembly further includes a support plate coupled to the crossmember and laterally adjustable along the length of the crossmember, the support plate having a plurality of perforations. The assembly also includes a set screw coupling the support plate to the crossmember, the set screw penetrating at least one perforation and mechanically engaging the crossmember.

A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits that each comprise a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed in the fluid end body and the fastening system secures the retainer element to the body. The fastening system comprises a plurality of externally threaded studs, washers and nuts in some embodiments. In other embodiments, the fastening system comprises a plurality of screws.

A break-off bolt for securing a conductor within a connector includes a first thread section, a second thread section and a torque-limiting section arranged between the first thread section and the second thread section. The first thread section and the second thread section comprise the same external thread having a minor diameter. The torque-limiting section has at least one of no thread with an outer diameter larger than the minor diameter of the external thread or an external thread having a minor diameter larger than the minor diameter of the external thread of the first and second thread sections.

A method of manufacturing a banjo bolt including a shaft portion including a vertical hole provided in the shaft portion and extending in a first direction, includes forming a first lateral hole and a second lateral hole by processing the shaft portion from a first side in a second direction crossing the first direction, the first lateral hole extending in the second direction and connecting an outside of the shaft portion and the vertical hole, the second lateral hole being located on an opposite side of the first lateral hole with respect to the vertical hole and extending in the second direction and connecting the outside of the shaft portion and the vertical hole, the second lateral hole being larger than the first lateral hole and overlapping the entire first lateral hole when viewed along the second direction, and forming a third lateral hole by processing a portion of the shaft portion where the first lateral hole is formed from a second side in the second direction through the second lateral hole, the third lateral hole being larger than the first lateral hole and similar to the second lateral hole when viewed along the second direction.

(in connection with FIG. 1) The invention relates to a ballistic protective helmet (10) comprising a shell (21) comprising a shell material that is produced from a number of textile layers (11, 12) connected in a connection matrix. The shell (21) of the protective helmet (10) according to the invention has a blind hole (22), wherein a threaded sleeve (23) has an outer thread (25) that penetrates into the shell material which surrounds the blind hole (22) in a peripheral direction, and wherein the threaded sleeve (23) has an inner thread (26) for connecting to a screwing means (24) having an outer thread (31).

A self-drilling self-tapping fastener for connecting more than two objects such as more than two layers of panels.

A screw includes a head having and a stem with spaced apart threads. The thread of the thread of the screw includes flat spots and sloped section, and is sized, such that it can securing attach through a hole in the pegboard without damaging the hole despite the thread being wider than the hole.

A screw includes a head having and a stem with spaced apart threads. The thread of the thread of the screw includes flat spots and sloped section, and is sized, such that it can securing attach through a hole in the pegboard without damaging the hole despite the thread being wider than the hole.