Locking fastener

Details Locking fastener Locking fastener

1981-04-13

1983-06-21

Britts, Ramon S.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having structure to restrict rotation of threaded, mating...

Comprising a thread lock

F16B 3930

Patent

active

RE0312843

ABSTRACT:
A vibration-resistant prevailing torque fastener combination comprising a conventional first element having a standard thread form with first flank angles and a modified second element having a thread form characterized by second steeper flank angles over the entire length thereof, and a truncated root caused by foreshortening of the flanks over a portion of the thread length to produce a helical flat which firmly engages and typically deforms the crest of the first element when threadedly engaged therewith. A difference in flank angles provides longitudinal clearance to receive the deformed material during the threaded engagement. Tapping tools are disclosed.

REFERENCES:
patent: 1447056 (1923-02-01), Bates
patent: 1828856 (1931-10-01), Bridges
patent: 2352540 (1944-06-01), Hanneman
patent: 2377405 (1945-06-01), Davies
patent: 2437638 (1948-03-01), Evans
patent: 3346278 (1967-10-01), Yocum
patent: 4071067 (1978-01-01), Goldby
patent: 4076064 (1978-02-01), Holmes

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