hauteur de tête

Désignations

Codes : pays ou zone où la désignation a cours (CH, FR, DE, EU = Union européenne, INT = usage international). Une désignation barrée est déconseillée.

Définitions

anglais

For a flat bearing surface head, ... the overall distance, measured parallel to the fastener axis, from the extreme top to the bearing surface. For a conical bearing surface head ... the overall distance, measured in a line parallel to the fastener axis from the extreme top to the intersection of the bearing surface with the extended thread major diameter cylinder on a threaded fastener or with the shank on an unthreaded fastener. For flat and oval undercut heads, ... this distance measured to the intersection of the bearing surface with the undercut. For oval heads and undercut oval heads, the overall distance is referred to as total head height.