Genuine DeWalt collet & nut assembly (part no. 326286-01) — a direct replacement for worn or damaged router collet nuts used on several DeWalt/Black & Decker routers.

This compact assembly accepts a 6.35 mm shank (¼" bits) and threads onto an M19 × 1 spindle, so it restores secure bit clamping and minimizes run‑out once tightened.

Fits example models such as DW614 and DW615 (and many of the related DW6xx/D262xx and Black & Decker BD6200/Q700 series routers), making it a straightforward swap when the original collet/nut is cracked, rounded or lost.

Physical size is small and service‑friendly (roughly 36 × 28 × 24 mm overall), and this is the genuine DeWalt replacement you’d look for among DeWalt spare parts to bring a router back to safe, accurate operation.