Tabella Gola Uni Iso 4755 ((top)) -

Allows the head or shoulder of the fastener to seat fully against the workpiece.

The standard (equivalent to the international ISO 4755:1983 ) specifies the form and dimensions of thread undercuts (known in Italian as gola di scarico ) for fasteners with external ISO metric threads. These features are typically used at the end of a threaded shaft to provide clearance for a cutting tool or to allow a mating component, like a plug, to sit flush against a shoulder. Key Technical Specifications tabella gola uni iso 4755

While ISO 4755 gives the design formula, actual dimensions are often found in the (Tapping screw threads) or specific product standards (like DIN 7513). Allows the head or shoulder of the fastener

Note: Exact diameters depend on whether the undercut is for external or internal thread. The standard provides distinct values. Key Technical Specifications While ISO 4755 gives the