Fastening element

Details Fastening element Fastening element

2006-03-21

2006-03-21

Sandy, Robert J. (Department: 3677)

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

Impact driven fastener, e.g., nail, spike, tack, etc.

Shank or penetrating end structure

C411S914000, C411S901000, C411S902000, C411S440000

Reexamination Certificate

active

07014409

ABSTRACT:
A fastening element which has a core (16) of a relatively hard, carburized steel and a ferritic rim zone (15) of a less hard, low-carbon steel, includes a stem (11), a head (14) provided at one end of the stem (11), a tip (13) provided at an opposite end of the stem (11), and a transition region (12) extending between the stem (11) and the tip (13) and in which a thickness (18, 19, 20) of the ferritic rim zone (15) gradually diminishes from the stem (11) in a direction toward the tip (13) to a nill value (21), so that the tip (13) is free from the ferritic rim zone (15).

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