Nut making machines and bolt making machines differ significantly in structural design, process flow, and applicable scenarios, primarily serving the production of different types of fasteners.

**Structural Design Differences:** Nut cold heading machines typically employ a short-stroke design, equipped with a transfer device to achieve part flipping, accommodating their "short and stout" geometry and through-hole structure. Bolt cold heading machines, on the other hand, are mostly long-stroke designs, with parts transferred between stations via a moving device, suitable for forming "long and thin" bolts.

**Process Flow Differences:** Nut production primarily uses reverse extrusion, requiring piercing the material to form a through hole, and relying on taps to machine the thread; bolts mostly use forward extrusion, with thread machining typically completed through thread rolling.

**Application Scenarios:** Nut cold heading machines are suitable for mass production of standard nuts, especially for locking nuts with side or top locking designs; bolt cold heading machines are mainly used for the efficient forming of bolts, screws, and other externally threaded fasteners.