Direct tension indicating washer having enhanced emission of...

Details Direct tension indicating washer having enhanced emission of... Direct tension indicating washer having enhanced emission of...

2008-03-17

2010-12-28

Saether, Flemming (Department: 3677)

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

With means to indicate application of predetermined...

Axially deformable member or portion

C411S013000, C411S014000

Reexamination Certificate

active

07857562

ABSTRACT:
A direct tension indicating washer including a first surface having a protuberance formed thereon; a second surface having an indentation formed opposite the protuberance; an indicating material positioned in the indentation; and a channel leading from the indentation to an outer diameter of the direct tension indicating washer; wherein the protuberance has four walls, each of the walls being substantially perpendicular to the first surface.

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