M10 vs M8 Sisal Poles: Match the Right Pole to Your Cat Tree

Quick answer

M10 and M8 are the thread sizes of the bolts that screw into the pole ends, so they decide whether a replacement pole will bolt onto your cat tree at all. Diameter and length decide how the pole looks and fits once it is attached. Measure the thread, the diameter and the length of your current pole before ordering, and match all three.

What the M number actually measures

The M in M10 or M8 is a metric thread callout for the bolt or screw that enters the pole end. M10 means a 10 mm nominal thread; M8 means 8 mm. It has nothing to do with how wide the wrapped pole is or how tall it stands. Two poles can both be 8 inches in diameter and still be incompatible if one takes M10 hardware and the other takes M8.

Cat Tree King poles use M10 threads, so a pole with M10 holes is the match for a Cat Tree King tree. If your tree uses M8 hardware, an M10 pole will not thread in, and forcing it damages the insert. The safe move is to check the original pole or the tree's assembly hardware before you buy.

How to measure your existing pole in three steps

You need three numbers: thread size, diameter and length. Work from the pole you are replacing, not from a photo or a memory of the tree.

For thread size, unscrew one bolt from the pole end and check the hardware spec, or compare the bolt against a known M8 or M10 fastener. For diameter, measure straight across the wrapped pole, not the bare core. For length, measure from end to end, including the flat mounting faces. Write the three numbers down before you open a product page.

• Thread: pull one bolt and confirm M8 or M10.
• Diameter: measure across the finished sisal wrap, not the inner core.
• Length: measure the full pole end to end, not just the visible scratching area.
• Hole pattern: count the screw holes at the bottom and top so the new pole mounts the same way.

Why hole count matters as much as thread size

A pole can have the right thread and still not mount cleanly if the screw-hole pattern does not line up with the platform or base it attaches to. Cat Tree King sisal poles carry 5 M10 screw holes at the bottom and 1 at the top, which is the pattern their trees are built around. If your tree's platform expects a different count or spacing, the pole may not seat flush even though the thread matches.

Count the holes on the pole you are removing and compare that number to the replacement. This is the step most people skip, and it is the one that causes a return.

Does diameter change the thread size?

No. Diameter and thread size are independent. An 8 inch pole and a 6 inch pole can both be drilled for M10, and an 8 inch pole can be drilled for M8. Treat them as two separate checks.

Diameter mainly affects how much scratching surface the pole offers and how it looks against the rest of the tree. Thread size affects whether it attaches. Get the thread right first, then choose diameter and length to suit the tree and your cat.

When a pole is not listed for your tree

If you cannot confirm the thread size on your tree, do not order on the assumption that all poles are interchangeable. Cat Tree King states that its sisal poles mount on any Cat Tree King cat tree provided the original has the same thickness and screw size. That condition is the whole answer: same thickness, same screw size, or it will not fit.

If your tree is from another brand, or you cannot identify the thread, measure the bolt first. A cheap thread gauge or a known M8 and M10 bolt will tell you in seconds what no product photo can.

Sisal pole fit FAQ

Can I use an M10 pole on a tree that takes M8?

No. The bolt will not thread into an M10 insert if your tree uses M8 hardware, and the mismatch can strip the fitting. Match the thread before anything else.

Does an 8 inch pole always use M10?

No. Diameter and thread size are separate specifications. An 8 inch pole can be drilled for either thread, so check the product listing rather than assuming. Verify both numbers, not one.

Will a Cat Tree King pole fit a non-Cat Tree King tree?

Only if the original pole has the same thickness and screw size. Cat Tree King states this condition directly, so measure your existing pole before ordering. Same thickness plus same screw size equals a fit.

Cat Tree King sisal poles at a glance

• Sisal Pole 20 inch x 8 inchØ - M10 (Beige): Sisal Pole 20 inch x 8 inchØ - M10 (Beige): beige, 20 inches long, 8 inch diameter, 5 M10 screw holes at the bottom and 1 at the top. The mid-length option in the 8 inch diameter group, useful when your original pole is around 20 inches and uses M10 hardware.
• Sisal Pole 31 inch x 8 inchØ - M10 (Beige): Sisal Pole 31 inch x 8 inchØ - M10 (Beige): beige, 31 inches long, 8 inch diameter, 5 M10 screw holes at the bottom and 1 at the top. The tallest of the three, suited to replacing a long lower pole where the cat does most of its vertical climbing.
• Sisal Pole 16 inch x 8 inchØ - M10 (Beige): Sisal Pole 16 inch x 8 inchØ - M10 (Beige): beige, 16 inches long, 8 inch diameter, 5 M10 screw holes at the bottom and 1 at the top. The shortest option, a direct match for a compact pole on the same tree without changing the overall height.