STAINLESS STEEL CONICAL SEAT WASHERS DIN 6319D

Conical Seat Washers DIN 6319D — DIN 6319D is the other half of the self-aligning washer pair that starts with the spherical DIN 6319C - a concave conical seat that mates with 6319C's convex face, together forming a bearing set that absorbs angular misalignment between the bolt hole and the surrounding surface. In use, the D washer's flat outer face bears against the fastener head or nut as normal, while its conical inner face mates with the spherical C washer, letting the whole assembly self-align slightly as it is tightened, rather than forcing the bolt to bend or the joint to bear unevenly against a surface that is not square to it. Like its counterpart, it cannot be used on its own: the self-aligning function only exists at the interface between the two washers, so specifying DIN 6319D without the matching C washer leaves a washer that does not do the job it was designed for. These pairs are specified on cast, forged, or fabricated components where perpendicularity between the bolt hole and bearing surface cannot be guaranteed by the manufacturing process - certain structural connections, machinery mountings, and pipeline flange joints are the typical applications, rather than general engineering assembly where flat, square surfaces can usually be assumed. Selecting the right pair means checking the angular compensation rating for the specific size against the DIN 6319 dimensional tables, since the amount of misalignment a given size can accommodate is defined precisely rather than being a generic figure across the whole range. Material selection generally follows the connection's operating environment: standard steel for general dry machinery, A2 (304-equivalent) stainless where moisture or general outdoor exposure is a factor, and A4 (316-equivalent) where the joint is exposed to process chemicals, marine conditions, or other genuinely corrosive environments that would otherwise compromise the precision-machined mating surfaces over time. To specify correctly, always order DIN 6319D as a matched pair with the corresponding DIN 6319C, sized to the bolt diameter and rated for the expected misalignment.

FAQs
Can DIN 6319D be used on its own?
No. It is designed to work as a matched pair with DIN 6319C; used alone it would not provide the self-aligning function, since the spherical/conical interface only works between the two mating faces.

How is DIN 6319D installed relative to DIN 6319C?
The spherical washer (C) is typically positioned so its convex face mates with the conical face of the D washer, with the flat face of the D washer bearing against the fastener head or nut, allowing self-alignment as it is tightened.

What applications commonly use a DIN 6319 washer set?
Applications with cast, forged, or fabricated components where perpendicularity between the bolt hole and the bearing surface cannot be guaranteed, such as certain structural, machinery, and pipeline flange connections.