Bolt including a cleaning thread point tip

Threaded – headed fastener – or washer making: process and apparat – Process – Making externally threaded fastener – e.g. – screw or bolt

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Details

470 8, 411386, 411418, B21H 302, B23G 900, F16B 2500, F16B 3504

Patent

active

056674430

ABSTRACT:
A fastener has a head and a shank with two ends. One of the ends includes the head while the other includes a pilot point. Also, the shank includes a threaded portion adjacent to the pilot point. A pair of recesses are formed 180.degree. from one another on the point and threaded portion. The recesses extend from the end of the point through at least a first full thread.

REFERENCES:
patent: 2823574 (1958-02-01), Rosan
patent: 3451080 (1969-06-01), McIntyre et al.
patent: 3492908 (1970-02-01), Thurston
patent: 5000639 (1991-03-01), Hinkley et al.

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