DIN 15A Threaded Male Short Butt-Weld Union Ferrule

DIN 15A Externally Threaded Male Ferrule Construction

The DIN 15A Threaded Male Short Ferrule forms the threaded male half of a DIN sanitary union assembly. Machined from 304L stainless steel, the component combines an external union thread barrel, an internal front groove that houses the DIN union seal ring, and a short cylindrical butt-weld neck for welding to stainless steel process piping.

Mating with DIN 14A Liner and Distinction from SMS 15A

In a complete DIN union joint, the 15A male ferrule mates with a stepped DIN 14A liner ferrule, a DIN union gasket, and a slotted round nut. While the supplier also designates Swedish-series male ferrules as '15A', the DIN 15A series has a distinct external thread diameter profile (dimension C from 2.05 inch on DN25 up to 5.12 inch on DN100) and includes DN32 (1-1/4 inch), so DIN 15A and SMS 15A parts cannot be cross-threaded.

Published DN25 to DN100 Dimensional Table

The cataloged series spans seven nominal sizes: DN25 (1 inch), DN32 (1-1/4 inch), DN40 (1-1/2 inch), DN50 (2 inch), DN65 (2-1/2 inch), DN80 (3 inch), and DN100 (4 inch). Published overall length (A) runs from 0.87 inch on DN25 to 1.73 inch on DN100, and bore diameter (B) runs from 1.02 inch to 3.94 inch.

Thread Specification and Weld Preparation

Because the drawing prints thread major diameter C in inches without stating the DIN 405 knuckle thread callout or weld-end OD, verify mating nut thread pitch and tube wall thickness before fabrication.