# US 2021/0277930 A1 · Internally threaded fastener having a prevailing torque feature > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277930 A1 - Document ID: US20210277930A1 - Status: Published application - Kind: A1 - Application number: 16/808,553 - Filed: 2020-03-04 - Published: 2021-09-09 - Earliest claimed: 2020-03-04 - Assignees: Production Spring, LLC - Applicants: Production Spring, LLC - Inventors: Lawrence Johnson; Arturo Spaccarotelli; Alfred Rosbury - Web page: https://patentgrep.com/patent/US20210277930A1 ## CPC - F16B 39/30: Locking exclusively by special shape of the screw-thread - B21C 23/14: Making other products - B21D 22/22: with devices for holding the edge of the blanks (B21D22/24 - B21D22/30 take precedence; shaping over a die without external former B21D11/02) - B21D 53/24: nuts or like thread-engaging members - B23G 1/16: in holes of workpieces by taps (B23G1/26, B23G1/32, B23G1/36 take precedence) - F16B 37/02: made of thin sheet material (fastening to surfaces F16B37/04 {; used as lock-nuts F16B39/14}) - F16B 37/041: {Releasable devices (F16B37/044, F16B37/045 take precedence)} - B21D 45/04: interrelated with motion of tool - F16B 2/245: {external, i.e. with contracting action} - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) - B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - B23G: THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B5/48, by milling B23C3/32, by forging, pressing, or hammering B21K1/56, by grinding B24B19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D15/04, by rolling B21H3/02) ## Abstract A threaded fastener having a prevailing torque feature and a method for forming same includes a barrel having a longitudinal axis. The barrel has a plurality of internal threads, each internal thread including a forward facing surface and a rearward facing surface. A first angle between the rearward facing surface and a first lateral axis perpendicular to the longitudinal axis ranges from 20° to 40°. A second angle between the forward facing surface and the rearward facing surface ranges from 80° to 100°. ## Claims ### Claim 1 An internally threaded fastener having a prevailing torque feature, comprising: a barrel having a longitudinal axis, the barrel having a plurality of internal threads, each internal thread including a forward facing surface and a rearward facing surface, wherein a first angle between the rearward facing surface and a first lateral axis perpendicular to the longitudinal axis ranges from 20° to 40°, wherein a second angle between the forward facing surface and the rearward facing surface ranges from 80° to 100°. ### Claim 2 (depends on 1) The internally threaded fastener of claim 1, wherein the first angle ranges from 25° to 35°. ### Claim 3 (depends on 2) The internally threaded fastener of claim 2, wherein the second angle ranges from 85° to 95°. ### Claim 4 (depends on 1) The internally threaded fastener of claim 1, further comprising a base plate, the barrel extending perpendicular to the base plate. ### Claim 5 (depends on 4) The internally threaded fastener of claim 4, wherein the barrel and the base plate are integrally formed as a one piece monolithic structure. ### Claim 6 (depends on 1) The internally threaded fastener of claim 1, wherein the internally threaded fastener is one of a u-nut, a t-nut, or a box nut. ### Claim 7 (depends on 1) The internally threaded fastener of claim 1, further comprising a planar wall extending parallel to the longitudinal axis and between adjacent internal threads of the plurality of internal threads. ### Claim 8 (depends on 1) The internally threaded fastener of claim 1, wherein the forward facing surface includes a first end and a second end, a diverging surface extending from the second end of the forward facing surface, wherein a third angle between the diverging surface and a second lateral axis perpendicular to the longitudinal axis ranges from 10° to 30°. ### Claim 9 (depends on 8) The internally threaded fastener of claim 8, wherein the third angle ranges from 15° to 25°. ### Claim 10 A method for forming an internally threaded fastener having a prevailing torque feature, comprising: providing a piece of sheet material; extruding the piece of sheet material to form a barrel having a longitudinal axis; and deforming the barrel to form a plurality of internal threads within the barrel, each internal thread including a forward facing surface and a rearward facing surface, wherein a first angle between the rearward facing surface and a first lateral axis perpendicular to the longitudinal axis ranges from 20° to 40°, wherein a second angle between the forward facing surface and the rearward facing surface ranges from 80° to 100°. ### Claim 11 (depends on 10) The method of claim 10, wherein the first angle ranges from 25° to 35°. ### Claim 12 (depends on 11) The method of claim 11, wherein the second angle ranges from 85° to 95°. ### Claim 13 (depends on 10) The method of claim 10, wherein the sheet material is formed of a metallic material, the metallic material being spring steel. ### Claim 14 (depends on 10) The method of claim 10, wherein the deforming of the barrel to form the plurality of internal threads further comprises tapping the barrel. ### Claim 15 (depends on 10) The method of claim 10, wherein the sheet material forms a base plate, the longitudinal axis of the barrel extending perpendicular to the base plate. ### Claim 16 (depends on 15) The method of claim 15, wherein the barrel and the base plate are integrally formed as a one piece monolithic structure. ### Claim 17 (depends on 10) The method of claim 10, wherein the internally threaded fastener is one of a u-nut, a t-nut, or a box nut. ### Claim 18 (depends on 10) The method of claim 10, wherein the barrel includes a planar wall extending parallel to the longitudinal axis and between adjacent internal threads of the plurality of internal threads. ### Claim 19 (depends on 10) The method of claim 10, wherein the forward facing surface includes a first end and a second end, a diverging surface formed at the second end of the forward facing surface, wherein a third angle between the diverging surface and a second lateral axis perpendicular to the longitudinal axis ranges from 10° to 30°. ### Claim 20 (depends on 19) The method of claim 19, wherein the third angle ranges from 15° to 25°.