Genuine Bosch 2610016801 — a metal blade screw / collar bolt that secures the cutting blade to the flange on Bosch/Dremel multi-saws.

The part uses a hex (Allen) socket head for installation and is supplied individually; it’s the fastener that holds the blade and washer/flange together so the blade stays seated and aligned.

Compatible examples: Dremel SM20 (Saw-Max), SM20-02, SM20120V, US40 (Ultra-Saw) and Bosch ULTRA-SAW20V — fits the blade/flange assemblies on those models.

Commonly replaced together with the flange/washer parts shown in the tool diagrams (for example part numbers 2610021327 and 2610012032), so check the flange when you install the new screw.

Simple, direct fit—replace the screw with the proper hex key to restore secure blade retention and safe operation.