M10 Hex Flange Bolt 50mm Zinc Plated Fine Thread

When a join cops a bit of movement and shake, a flange bolt does the work of a bolt and a washer in one. The serrated flange spreads the load across a wider face and bites in as you tighten, so the head sits flat and stays put.

This one is M10 with a 50mm shank, made to DIN 6921 in class 8.8 zinc-plated steel. The high-tensile rating holds torque on metal and machinery where a soft bolt would stretch or work loose, and the zinc coat keeps surface rust off in a shed or under a vehicle. These run a fine 1.25mm pitch, so check your hole is threaded fine before you buy, not the standard coarse pitch.

Reach for these on trailers, mower decks, brackets, and any bolt-up that takes vibration. If you're matching an existing thread, bring the old one in and we'll check the size with you.

Full thread, pitch, and grade details are in the specs below.