Abstract: A method of attaching a nut to a panel includes forming an aperture in a sheet metal panel by lancing a tab from the sheet metal panel. A root of the tab remains attached to the panel. The method further includes pressing a self-attaching nut into the aperture to attach the self-attaching nut to the sheet metal panel. The tab is bent to substantially prevent material from entering a bore of the nut from a blind side of the panel.

Abstract: A die button for installation of a nut to a panel includes a button body with a panel end, and a cavity defined therein. An aperture is defined in the panel end at a mouth of the cavity. A shearing edge is at a perimeter of the aperture to shear a tab from the panel when a shearing force is applied to the panel by the nut driven by a punch of a press. A relief is in a portion of the perimeter of the aperture to bend a root portion of the panel connecting the tab to the panel without severing the root when the nut applies the shearing force. A reaction member is slidably disposed within the cavity. A resilient member is disposed within the cavity to urge the reaction member toward the panel end, thereby bending the tab to contact the nut and seal a bore.

Abstract: An internal combustion engine exhaust system component includes an exhaust gas conduit having a metal shell. A boss is crimped to the metal shell. The boss is to threadingly mount an electrical sensor to measure an exhaust gas property. The boss includes a self-attaching nut.

Abstract: A method of attaching a nut to a panel includes forming an aperture in a sheet metal panel by lancing a tab from the sheet metal panel. A root of the tab remains attached to the panel. The method further includes pressing a self-attaching nut into the aperture to attach the self-attaching nut to the sheet metal panel. The tab is bent to substantially prevent material from entering a bore of the nut from a blind side of the panel.

Abstract: A die button for installation of a nut to a panel includes a button body with a panel end, and a cavity defined therein. An aperture is defined in the panel end at a mouth of the cavity. A shearing edge is at a perimeter of the aperture to shear a tab from the panel when a shearing force is applied to the panel by the nut driven by a punch of a press. A relief is in a portion of the perimeter of the aperture to bend a root portion of the panel connecting the tab to the panel without severing the root when the nut applies the shearing force. A reaction member is slidably disposed within the cavity. A resilient member is disposed within the cavity to urge the reaction member toward the panel end, thereby bending the tab to contact the nut and seal a bore.

Abstract: A self-attaching nut for attachment to a panel includes a central pilot portion having a bore therethrough, and having a substantially cylindrical outer surface. A flange portion surrounds the outer surface of the pilot portion, and the flange portion includes an annular groove surrounding the pilot portion. The annular groove has a substantially V-shaped axial cross section. The self-attaching nut further includes a plurality of spaced raised buttons formed on a surface of the annular groove. The spaced raised buttons are configured to substantially prevent relative rotation between the nut and the panel, and configured to aid in preventing pull-out of the nut from the panel.

Abstract: A self-attaching fastener and panel assembly wherein the free open end of the tubular barrel portion is coined, collapsed axially, flattened and deformed radially inwardly and outwardly and axially against a panel surrounding the panel opening. The method of installation includes driving the free end of the tubular barrel portion against a substantially planar die surface, deforming an end portion radially, then collapsing an intermediate portion over the radially deformed end portion, flattening the end portion, substantially thickening the tubular barrel portion and forming an annular surface engaging and supporting the panel surrounding the opening. The die member includes an annular moat surrounding a central die post and a planar die surface extending generally perpendicular to the axis of the die button.

Abstract: A clinch element including a body portion having an annular lip portion projecting from an end face of the body portion including an arcuate free end and a frustoconical outer surface. One embodiment includes an annular lip projecting from both end faces of the body portion. A method of attaching the clinch element to one or two panels which includes driving the free end of the lip portion against an outwardly inclined frustoconical chamfered face of a die cavity, deforming the annular lip over the panel and a die member having a projecting piloting point and an annular die cavity surrounding the piloting point.

Abstract: A self-attaching nut for attachment to a panel including a central pilot portion having a generally cylindrical outer surface, a flange portion surrounding the outer surface of the pilot portion including an annular groove surrounding the pilot portion having a substantially V-shaped bottom wall and a generally planar panel support surface surrounding the annular groove. The panel support surface includes a plurality of circumferentially spaced radial ribs extending into the annular groove, but spaced from the outer surface of the pilot portion. The grooves may be convex or concave or a combination of convex and concave grooves. In one embodiment, the nuts are rectangular and the back face include two pair of transverse linear grooves for interconnection by frangible wires in side to side relation.

Abstract: A self-diagnosing pierce nut installation apparatus including an installation head attached to an upper die member of a die press having a reciprocating plunger driving a pierce nut against a panel, piercing a slug from the panel upon closing of the press and a rod telescopically received in the plunger resiliently biased through the nut bore if a slug is pierced from the panel or against the panel if not pierced, and a sensor sensing axial movement of the rod, stopping the press if the rod engages the panel. A die located in the lower die member includes a slug sensor confirming receipt of the panel slug through the die member.

Abstract: A cage nut assembly for a drain pan includes a nut having a barrel with a barrel end and a distal end opposed thereto. A flange at the distal end has a flange face abutting the drain pan inner surface. A threaded bore is defined along a central axis through the barrel and flange. At least one channel is defined in the flange face and allows substantially complete drainage of a fluid from a sump through a single drain aperture. A cage having a plate with a central aperture receives the barrel with substantial clearance to an edge of the central aperture. Leg(s) extend substantially orthogonally from the plate. An attachment projection on the leg(s) attaches the assembly to the drain pan. The assembly accepts a flange bolt removably installed through the single drain aperture. The flange bolt removably compresses a seal around a periphery of the single drain aperture.

Abstract: A method of attaching a clinch spacer to a panel including forming a clinch spacer having a body portion including an axial bore, an annular flange portion surrounding the bore and an annular barrel portion integral and coaxially aligned with the flange portion having a diameter less than the flange portion including an end face having an outer lip extending at an angle radially outwardly and axially from the end face; forming an opening in the panel; and driving the barrel portion through the opening in the panel against a die member having a generally V-shaped annular projecting lip which is driven against a second face of the panel, deforming the panel radially inwardly against the outer surface of the barrel portion and deforming the outer annular lip radially outwardly and axially against the panel, forming a secure installation.

Abstract: The present invention is an assembly and method for continuously manufacturing fasteners. A die press actuated at a first speed receives the contoured wire into a die having a piercing element for piercing an aperture and a cutting element for cutting a fastener from the wire. A guide receives the fasteners from the die press and a drive unit engages the fasteners oriented by the guide and conveys the fastener to an elevated height relative to a tapping device. The guide redirects the fasteners by a first router. The fasteners are gravity fed into the first router and redirected to one of the tapping devices. Each tapping device has a tapping element for forming internal ribs in the aperture of the fastener. The tapping devices each actuates at a second speed that in aggregate is generally equal to the first speed of the die press.

Abstract: An assembly line for continuously manufacturing fasteners from a rod with a groove for receiving a wire for retaining the fasteners in a strip includes a receiver for receiving the rod. A die press is arranged to receive the rod from the receiver and includes a piercing member for piercing an aperture in each fastener and a cutting member for cutting each fastener from the rod. A tapping member provides ribs to an inner wall of the aperture formed in the fastener by the piercing member. An inspector inspects the internal rib formed into the inner wall of the aperture disposed in the fastener verifying exactness of the aperture and the rib. A wire inserter inserts the wire into the groove forming a strip of connected fasteners. The inserter receives the fasteners sequentially from the inspector after verification of the exactness of the aperture disposed in each fastener.

Abstract: A method of forming pierce and clinch nuts by rolling a section having the desired cross-section, punching equally spaced bores through the central pilot portion and then punching configured openings through the central pilot portion having convex arcuate surfaces and eliminating sharp corners. The strip of interconnected self-attaching fasteners may be installed directly from the strip in a panel, fed in bulk or separate fasteners interconnected by frangible connectors. The resultant self-attaching nut includes a central pilot portion having a bore through the top face, integral flange portions extending from opposed sides and the pilot portion includes convex arcuate faces reducing or eliminating stress cracking and propagation of stress cracks.

Abstract: A method of attaching a clinch spacer to a panel including forming a clinch spacer having a body portion including an axial bore, an annular flange portion surrounding the bore and an annular barrel portion integral and coaxially aligned with the flange portion having a diameter less than the flange portion including an end face having an outer lip extending at an angle radially outwardly and axially from the end face; forming an opening in the panel; and driving the barrel portion through the opening in the panel against a die member having a generally V-shaped annular projecting lip which is driven against a second face of the panel, deforming the panel radially inwardly against the outer surface of the barrel portion and deforming the outer annular lip radially outwardly and axially against the panel, forming a secure installation.

Abstract: The method of forming self-attaching female fasteners by rolling a continuous metal strip including a central pilot portion having parallel sides and flange portions on opposed sides, severing at least the pilot portion and cold forming the rectangular pilot portion into a cylindrical end portion. Wing-shaped radial portions are formed in the pilot portion which may be severed or remain for anti-rotation features. The strip may remain continuous, wherein the severed pilot portions are spread and the flange portions are thinned or the strip may be severed into discrete fasteners. The female fasteners thus include generally cylindrical pilot portions and rectangular flange portions which may include rolled grooves.

Abstract: A self-attaching nut having a central pilot projecting from an end face of the body portion, an annular groove surrounding the pilot and an annular panel support face surrounding the groove, wherein the outer side wall includes a plurality of circumferentially spaced notches, each having an outer wall which extends from the bottom wall of the annular groove to the panel support face and the bottom wall of the groove includes a plurality of circumferentially spaced radial ribs integral with either the outer or inner side walls of the annular groove having a radial end spaced from the opposed side wall and a top face inclined toward the bottom wall of the annular groove providing improved torque resistance and push-off strength. Alternating circumferentially overlapping radial ribs integral with the pilot and the outer groove wall and ribs which extend below the bottom wall of the groove are also disclosed.

Abstract: A self-attaching fastener includes a pilot portion having an outer side wall and is surrounded by an annular flange. The annular flange includes a planar end face defining a peripheral edge with a diameter greater than a diameter of said outer side wall of the pilot portion. The end face includes a plurality of first circumferentially spaced anti-rotation elements each having a planar top face spaced above the planar end face of the annular flange and a second plurality of second circumferentially spaced anti-rotation elements each having a planar top face spaced below the planar end face of the annular flange. Each of the first and second anti-rotation elements extend from about one of the peripheral edge of the annular flange and the outer side wall to a location spaced from the other of the peripheral edge of the flange portion and the outer side wall of the pilot portion.

Abstract: A self-attaching nut having a central pilot projecting from an end face of the body portion, an annular groove surrounding the pilot and an annular panel support face surrounding the groove, wherein the outer side wall includes a plurality of circumferentially spaced notches, each having an outer wall which extends from the bottom wall of the annular groove to the panel support face and the bottom wall of the groove includes a plurality of circumferentially spaced radial ribs integral with either the outer or inner side walls of the annular groove having a radial end spaced from the opposed side wall and a top face inclined toward the bottom wall of the annular groove providing improved torque resistance and push-off strength. Alternating circumferentially overlapping radial ribs integral with the pilot and the outer groove wall and ribs which extend below the bottom wall of the groove are also disclosed.