One embodiment of the present invention provides a stamped metal primer insert for a polymeric ammunition cartridge comprising: a top surface having a stamped flange that extends circumferentially about an outer edge of the top surface; a stamped coupling element that extends from the flange to a coupling tip; a stamped inner coupling element from the coupling tip to a bottom surface, wherein the bottom surface is opposite the top surface; a stamped primer recess in the top surface that extends toward the bottom surface; a primer flash aperture in the primer recess through the bottom surface; and a groove stamped in the primer recess around the primer flash aperture adapted to receive a polymer overmolding.

A bone fastener includes a screw shaft having a proximal portion and a distal portion. The proximal portion is formed by a first manufacturing method and defines a distal face. The distal portion is formed onto the distal face by a second manufacturing method. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A bone fastener includes a screw shaft having a proximal portion and a distal portion. The proximal portion is formed by a first manufacturing method and defines a distal face. The distal portion is formed onto the distal face by a second manufacturing method. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A build plate includes a surface that defines at least one opening configured for disposal of a proximal portion of a screw shaft. The proximal portion is formed by a first manufacturing method and defines a distal face. The proximal portion is connected with the surface in a configuration to orient the distal face for forming a distal portion of the screw shaft thereon by a second manufacturing method that includes an additive manufacturing apparatus. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A build plate includes a surface that defines at least one opening configured for disposal of a proximal portion of a screw shaft. The proximal portion is formed by a first manufacturing method and defines a distal face. The proximal portion is connected with the surface in a configuration to orient the distal face for forming a distal portion of the screw shaft thereon by a second manufacturing method that includes an additive manufacturing apparatus. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A bone fastener includes a screw shaft having a proximal portion and a distal portion. The proximal portion is formed by a first manufacturing method and defines a distal face. The distal portion is formed onto the distal face by a second manufacturing method. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A bone fastener includes a screw shaft having a proximal portion and a distal portion. The proximal portion is formed by a first manufacturing method and defines a distal face. The distal portion is formed onto the distal face by a second manufacturing method. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

The inventive concept relates to method for manufacturing a metal based component comprising at least one protrusion. The method comprises: providing a metal based substrate comprising a surface having at least one cavity; providing a metal based protrusion element comprising a first portion and a second portion, wherein said first portion has a shape that conforms to a shape of the cavity; arranging the first portion of the protrusion element in said cavity such that at least the second portion of the protrusion element protrudes at least 5 mm from a surface of the metal based substrate, to form a substrate comprising a protrusion; placing said substrate comprising a protrusion in a canister such that a void is formed between the canister and the surface of the substrate comprising the protrusion; filling at least a portion of the void with a diamond powder such that the surface of the substrate comprising the protrusion is covered by the inert filler material; removing gas from the interface between said diamond powder and said substrate comprising

The present invention provides an ammunition cartridge having a primer insert having a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and one or more pads positioned on the recess bottom; a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive a polymer overmolding.

A washer and retained nut assembly has a washer with a retaining flange and a positioning cavity and a nut received in the washer. The nut has a shoulder received in the positioning cavity with a top surface of the shoulder engaging a lower surface of the retaining flange in a loose condition of the washer and nut. The nut further has an engagement surface contacting a receiving surface in the washer in an engaged position of the washer and nut. The nut further has a peripheral surface engaging a blocking surface in the washer with the nut and washer in a maximum offset angle orientation between the washer and nut in the engaged position.