A pair of swage nuts threaded to accept 8-32 screws. Note the narrow undercut visible just above the clinching ring on the left-hand nut.
It permanently anchors itself to the sheet metal by swaging the surrounding material. Generally, the swage nut is made of a hard metal such as stainless steel, which is inserted into a pre-drilled hole in a softer ductile material such as aluminum. The inserted shank has three diameters: a main shaft which fits the hole closely, a thin smaller-diameter undercut, and a larger-diameter serrated clinching ring. Forcing the clinching ring into softer material, with an arbor press or by tightening a screw through the hole, causes it to plastically deform (swage) into the annular recess in the shank. This locks the nut into the hole. The knurling on the clinching ring is not necessary for this step, but prevents the nut from rotating after installation.[1]
This is a popular method for adding strong, load-bearing threads to a relatively thin piece of soft sheet metal.
Self-clinching nuts are described in National Aerospace Standard NASM45938 which supersedes military specification MIL-N-45938[2]
Historyedit
Albert Spokes filed for a U.S. patent on the swage nut in early 1958.[3] The swage nut is descended from an older idea, the clinch nut. Clinch nuts incorporate a tubular shaft that fits through the part to be attached and is clinched or riveted in place from the opposite side.[4][5]
^Smith, Carroll (1990), Carroll Smith's Nuts, Bolts, Fasteners, and Plumbing Handbook, MotorBooks/MBI Publishing Company, p. 112, ISBN0-87938-406-9
^"MIL-N-45938: Nut, Plain, Clinch (self-clinching, round)" (PDF). 2 October 1984.
^US 3000420, Albert Spokes, "Nut with recesses to receive metal of the workpiece", issued Sept. 19, 1961
^US 1502399, Harold G Renner, "Rivetable nut", issued July 22, 1924
^US 2026757, Arthur Swanstrom, "Nut structure", issued Jan 7, 1936
April 14, 2024
swage, swage, self, clinching, type, threaded, insert, that, used, sheet, metal, pair, swage, nuts, threaded, accept, screws, note, narrow, undercut, visible, just, above, clinching, ring, left, hand, permanently, anchors, itself, sheet, metal, swaging, surrou. A swage nut or self clinching nut is a type of nut or threaded insert that is used on sheet metal A pair of swage nuts threaded to accept 8 32 screws Note the narrow undercut visible just above the clinching ring on the left hand nut It permanently anchors itself to the sheet metal by swaging the surrounding material Generally the swage nut is made of a hard metal such as stainless steel which is inserted into a pre drilled hole in a softer ductile material such as aluminum The inserted shank has three diameters a main shaft which fits the hole closely a thin smaller diameter undercut and a larger diameter serrated clinching ring Forcing the clinching ring into softer material with an arbor press or by tightening a screw through the hole causes it to plastically deform swage into the annular recess in the shank This locks the nut into the hole The knurling on the clinching ring is not necessary for this step but prevents the nut from rotating after installation 1 This is a popular method for adding strong load bearing threads to a relatively thin piece of soft sheet metal Self clinching nuts are described in National Aerospace Standard NASM45938 which supersedes military specification MIL N 45938 2 History editAlbert Spokes filed for a U S patent on the swage nut in early 1958 3 The swage nut is descended from an older idea the clinch nut Clinch nuts incorporate a tubular shaft that fits through the part to be attached and is clinched or riveted in place from the opposite side 4 5 See also editRivet nut Friction drillingReferences edit Smith Carroll 1990 Carroll Smith s Nuts Bolts Fasteners and Plumbing Handbook MotorBooks MBI Publishing Company p 112 ISBN 0 87938 406 9 MIL N 45938 Nut Plain Clinch self clinching round PDF 2 October 1984 US 3000420 Albert Spokes Nut with recesses to receive metal of the workpiece issued Sept 19 1961 US 1502399 Harold G Renner Rivetable nut issued July 22 1924 US 2026757 Arthur Swanstrom Nut structure issued Jan 7 1936 Retrieved from https en wikipedia org w index php title Swage nut amp oldid 1058812629, wikipedia, wiki, book, books, library,
