How to thread 8 mm (5/16 inch) stainless steel rods

Written by steve sloane
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How to thread 8 mm (5/16 inch) stainless steel rods
Dies are used to create male threads. (Hemera Technologies/ Images)

Stainless steel rods are used in the installation of household construction and in the food and petrochemical industry. Creating a thread around the rod (known as a male thread) is carried out with a device known as a die. The die is made from a cross-section of metal with a hollow centre, with centre walls that have threads that cut into the perimeter of the rod. Different size dies are available to cut threads on different diameter rods.

Skill level:

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Things you need

  • Pipe vice
  • Rag
  • Stainless steel cutting oil
  • Rag or brush
  • Stainless steel die, 8 mm (5/16 inch)
  • Die casing with handles
  • Screwdriver

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  1. 1

    Secure the stainless steel rod in a pipe vice, with the end to be threaded within 30 cm (12 inches) of the vice jaws. Wrap a rag around the rod in the position where it will be secured in the vice to stop any potential scratching.

  2. 2

    Smear cutting oil around the end of the rod as well as the die threads with either a rag or brush. Place an 8 mm (5/16 inch) stainless steel die into the die casing and tighten the casing's side screw with a screwdriver to secure the die in place (the die casing has a handle attached to each side).

  3. 3

    Position the centre hole of the die perpendicular to the end of the stainless steel rod. Push firmly on the die casing handles and turn the die clockwise half a turn. Take special care starting the threading process, as stainless steel rods are more slippery than regular steel rods and a little harder to get the threading process started.

  4. 4

    Turn the die counterclockwise slightly to remove shavings from the die threads. Make another clockwise half a turn with the die, before again turning it slightly counterclockwise. Continue this process until the rod nearly extends from the hollow centre of the die.

  5. 5

    Remove the die from the rod by turning the die counterclockwise. Wipe off all shavings and cutting oil from both the rod and die with a rag.

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