Self drilling screw

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation

Patent

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Details

411411, 411416, F16B 2500

Patent

active

051413760

ABSTRACT:
A self drilling screw for thin metal applications. The screw has a small point for drilling a hole in the thin metal and a substantially larger diameter non-tapered threaded section. Between these portions is an extended length taper having a plurality of thread pitches each including swaging lobes.

REFERENCES:
patent: 2479730 (1949-08-01), Dewar
patent: 3125923 (1964-03-01), Hanneman
patent: 3288015 (1966-11-01), Hanneman
patent: 3426642 (1969-02-01), Phipard, Jr.
patent: 4749322 (1988-06-01), Sygnator
patent: 4781503 (1988-11-01), Bogel
patent: 4781506 (1988-11-01), Roberts et al.

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