Din2353 Series Ll Cutting Ring

The LL06 size designation corresponds to the light series in the DIN 2353 standard, and yes, the thread is metric. Specifically, the side 1 callout is M10 x 1.0, so you're working with a 10mm diameter thread at a 1.0mm pitch. Steel construction throughout, and the overall length comes in at 9.5mm. Pretty standard metric tube fitting hardware for hydraulic line assemblies built to DIN spec.

This cutting ring is designed for use with LL06 size DIN tubes.