IDF-13R Sanitary Slotted Round Union Nut with ACME Thread in SS304 / SS316L

Component Role & Slotted Round Nut Geometry

The IDF-13R round nut provides a slotted circular alternative to the hexagonal IDF-13H nut in International Dairy Federation (IDF) pipe unions. Tightened with a hook spanner (C-spanner), its internal flange retains the IDF-14 welding liner while its internal ACME threads draw the IDF-15 male end against the union gasket.

Material Grades & Dimensional Scope

Manufactured in SS304 and SS316L stainless steel across six nominal sizes from 1.0" through 4.0" (1.0", 1.5", 2.0", 2.5", 3.0", and 4.0"), the IDF-13R nut features 8 TPI ACME threads from 1.0" to 3.0" (34.34×8TPI ACME to 91.37×8TPI ACME) and 6 TPI ACME threads at 4.0" (122.05×6TPI ACME). In the dimensional table, rear bore diameter A spans 30.5 mm to 112 mm and outer diameter B spans 48 mm to 142 mm.

Drawing Dimension Note & Ordering Guidance

Note that on the dimensional drawing, the sectional figure labels the axial thickness dimension as H while the accompanying table headers label the corresponding 30 mm (1.0"–2.5") and 35 mm (3.0"–4.0") column as SW; because this is a slotted round nut rather than a hex nut, that value represents axial nut height. Confirm nominal IDF size and material grade when ordering.