Tabella Gola Uni Iso 4755 -

The UNI ISO 4755 standard (equivalent to the international ISO 4755) specifies the required form and dimensions for thread undercuts on bolts, screws, and similar externally threaded products. These undercuts are used to provide clearance for tools during machining or to ensure a flush fit for mating components. Technical Specifications for Thread Undercuts

Contenuto della Tabella Gola UNI ISO 4755

è stata ritirata nel 2009 e sostituita dalla UNI ISO 4755, sebbene rimanga un riferimento storico per vecchi progetti. tabella gola uni iso 4755

Applications of the Tabella Gola Uni

The Tabella Gola Uni, as specified under the UNI ISO 4755 standard, finds applications in various industries, including but not limited to:

Standardization, he realized, wasn't about being rigid—it was about making sure the smallest details could carry the heaviest loads. The UNI ISO 4755 standard (equivalent to the

4. Main Applications

• Screw fastening up to a shoulder – using an undercut on the bolt shank near the head.
• Internal thread undercuts – to allow taps to run out without leaving incomplete threads in blind holes.
• Precision mechanical assemblies (automotive, aerospace, machine tools) where axial positioning is critical.

2. Why the “Tabella Gola” is needed

Without a standardized undercut:

Flush Fitting: Without an undercut, a small radius or incomplete thread often remains at the base of a shaft, preventing a nut or part from seating perfectly flat. Screw fastening up to a shoulder – using

Surface Finish: The undercut surface should ideally be smoother than the thread itself to prevent crack initiation.