A cavity-free seal can only be assured in combination with the Hygienic USIT^® seal and shim washer. The polished cap nuts have a surface finish of Ra < 0.8 µm. Internal transition areas with a minimum radius of 3 mm are also provided, preventing dirt particles from adhering to the components and ensuring easy cleaning.

The cap nut with collar for Hygienic USIT^® seal and shim washers is ideal for fastening in sterile areas and also constyle to EHEDG regulations, something that is confirmed with the relevant certificate.

The EHEDG certificate is only valid when a specifically matched Hygienic USIT^® seal and shim washer K1491 is used.

Hygienic USIT^® seal and shim washer K1491.
Hexagon head bolts with collar K1492.
Sockets with plastic inserts K1361.
Ring/open-end spanner with protective caps K1362.