F16B 25 - Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws

Patents for F16B 25 - Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws (3,519)
06/1977
06/07/1977	US4027573 Self-tapping screw fastener with improved thread construction
05/1977
05/10/1977	US4022099 Threaded fastener with reusable thread forming pilot tip
04/1977
04/12/1977	US4016795 Self-drilling screws
04/05/1977	US4015504 Self-boring fastener and methods of use thereof
09/1976
09/28/1976	US3982464 Drilling and reaming
09/07/1976	US3978760 Self-thread forming threaded fasteners and blanks for making same
08/1976
08/24/1976	US3975788 Method of forming a threaded female fastener
07/1976
07/20/1976	USRE28907 Self-tapping threaded bushings
06/1976
06/29/1976	US3965793 Particleboard screw
04/1976
04/13/1976	US3949641 Self-drilling screw
03/1976
03/09/1976	US3942406 Slab-sided self-tapping screw
03/09/1976	US3942405 Piercing sharp pointed gypsum board screw for metal studs
02/1976
02/24/1976	US3939512 Male screw-forming members
02/10/1976	US3937120 Drill screw
02/10/1976	US3937119 Masonry anchor device
02/03/1976	US3935785 Thread swaging screw
01/1976
01/27/1976	US3934444 Method and apparatus for forming vibration-resistant thread-forming screw
01/20/1976	US3933075 Self-drilling fastener and method of making same
01/13/1976	US3932050 Joint structure