Manual indexing button, smooth body, no flange - Manual indexing button, smooth body, no flange - Two versions available. - Material : Body: Steel 1.0403 (suitable for welding) Pin: Hardened steel, Resistance class 5. Head: Dark grey thermosetting plastic Info - Index bolts are used where lateral movement is required to be blocked. Pulling the handle releases the pin. The M version allows the pin to be held in the retained position. - Bolts should be welded using a WIG inert gas process.