Component (a building block) — not the same thing as a radical or a sound component. · 3strokes
势扎扑扒打扔托扛
Kangxi radical no.64 · 手 · 4strokes — The 214 Kangxi radicals
Filed under it in a dictionary. That is a lookup convention — it does not mean it is the only part the character is built from.
手才扑打托扛扣扩