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Class Information
Number: 411/420
Name: Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener > Externally threaded fastener element, e.g., bolt, screw, etc. > Thread or shank structure > Circumferentially interrupted thread > By longitudinal slot > Inclined slot
Description: Subject matter wherein the groove is at an angle to the fastening means axis.

Sub-classes under this class:

Class Number Class Name Patents
411/421 Helically oriented 22

Patents under this class:

Patent Number Title Of Patent Date Issued
8647038 Fastener with shaving inhibitor Feb. 11, 2014
5863165 Self-tapping screw Jan. 26, 1999
5667348 Screw for fibrous boards Sep. 16, 1997
5599149 Self-tapping floor screw Feb. 4, 1997
4425066 Drill screw Jan. 10, 1984

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