Makita 251919-8 Spare Part - SQ NECK SETSCREW M6X20 BCS550

Original Makita 251919-8 — Cap-square neck bolt (C.S.N.) M6 × 20 mm. This genuine Makita fastening bolt (part number 251919-8) is the small but critical M6×20 cap/square-neck bolt used to secure handles, guards and small assemblies on a variety of saws, trimmers, jointers and sanders.

Head and fit details: M6 thread with a 20 mm length and a square neck beneath the head to lock the bolt into mating parts and prevent rotation — standard metric sizing for a precise, repeatable fit.

Where it’s used: fits many Makita machines (examples include 5402NA beam saw, 3901 plate joiner, 3700B/3703 laminate trimmers, 4200H/4200NH circular saws, 5005BA/5007S/5820 circular saws, BSS610/BSS611 series, 9741 wheel sander and others).

Sold as an individual replacement part, this original Makita neck bolt is an inexpensive, direct-fit option to get your tool back in service quickly — a common small Makita parts item to keep on hand for repairs.

Note: this is a basic metric cap-square neck bolt (M6×20) commonly used across many Makita tools; it’s one of those tiny parts for power tools that, when missing or damaged, stops a job cold.

Jump straight to the Makita spare parts diagrams:

• Makita 3703 Parts
• Makita 3901 Parts
• Makita 9741 Parts
• Makita BSS611 Parts

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