Uploaded February 2026 | Updated September 2026, 1 week ago
When you strip a chainsaw down and end up with a box full of random screws and bolts, it can feel impossible to know which goes where. In this video I show you a simple but reliable way to identify the correct bolts and screws for reassembly — so you don’t damage threads, strip housings, or end up with loose parts.
The principle is straightforward:
Coarse-thread screws are designed to bite into plastic housings and covers. Their wider spacing grips the softer material securely without pulling out.
Fine-thread bolts are meant for metal components such as the crankcase, handle brackets, or bar studs. These give stronger clamping in hard material and resist vibration.
I’ll walk you through real examples on this chainsaw rebuild so you can clearly see the difference. By understanding the purpose of thread pitch, bolt design, and material type, you’ll always be able to sort out a mixed box of fasteners and rebuild your chainsaw with confidence.
Have a Great day
Craig
When you strip a chainsaw down and end up with a box full of random screws and bolts, it can feel impossible to know which goes where. In this video I show you a simple but reliable way to identify the correct bolts and screws for reassembly — so you don’t damage threads, strip housings, or end up with loose parts.
The principle is straightforward:
Coarse-thread screws are designed to bite into plastic housings and covers. Their wider spacing grips the softer material securely without pulling out.
Fine-thread bolts are meant for metal components such as the crankcase, handle brackets, or bar studs. These give stronger clamping in hard material and resist vibration.
I’ll walk you through real examples on this chainsaw rebuild so you can clearly see the difference. By understanding the purpose of thread pitch, bolt design, and material type, you’ll always be able to sort out a mixed box of fasteners and rebuild your chainsaw with confidence.
Have a Great day
Craig
