How to Remove a Spanner Nut

A spanner nut has a large center opening that threads onto the threaded end of a pipe or open coupling.
The nut itself is relatively narrow with tabs that line its outside edge. The outer tabs are the key to loosening the spanner nut, and a specialized tool makes it easier to loosen the spanner nut. A spanner wrench utilized the tabs and improves the mechanical advantage you have on the nut. Unfortunately, in most situations you cannot get the spanner wrench to the spanner nut.

Step 1

Put on a pair of safety glasses and leather work gloves.

Step 2

Spray the spanner nut with a liberal coating of penetrating oil to loosen the bond between the spanner nut and the threaded area holding the spanner nut.

Step 3

Place the tip of the drift pin on the right side of one of the tabs of the spanner nut.

Step 4

Hit the backside of the drift pin with the hammer to drive the spanner nut counter-clockwise to loosen the spanner nut.

Step 5

Move the drift pin to another spanner nut tab and repeat the process. The spanner nut may take a lot of hammering to break tit free and you will need to alternate the tab that you place the drift pin.

Step 6

Spin the spanner nut counter-clockwise to remove it from the threads of the part holding the nut, after it breaks free.

Step 7

Clean the threads of the spanner nut and the threaded part with the wire brush to remove corrosion and debris from the area, if you will need to reinstalled the removed spanner nut.

Things You Will Need

  • Safety glasses
  • Leather work gloves
  • Penetrating oil
  • Drift pin
  • Hammer
  • Wire brush