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1/4-20 Hardware

1/4-20 hardware is commonly used in FRC for high-load applications where additional strength is needed. The larger diameter provides greater thread engagement and improved resistance to stripping.

What Does 1/4-20 Mean?

  • 1/4 refers to the major diameter of the screw (0.250")
  • 20 refers to the number of threads per inch (TPI)

This makes 1/4-20 a coarse-thread fastener that is durable and well-suited for structural applications.

Common Hardware

1/4-20 hardware includes:

  • Socket head cap screws
  • Button head screws
  • Nylock nuts
  • Washers
  • Tapped holes in aluminum

Common Lengths

Typical lengths used in FRC include:

  • 1/2"
  • 3/4"
  • 1"
  • 1-1/4"
  • 1-1/2"
  • 2"

The correct length should allow full thread engagement without excessive exposed threads.

Typical Tools

  • 3/16" hex key or T-handle
  • 7/16" wrench or socket for nuts
  • #7 drill bit for tap holes
  • 17/64" drill bit for clearance holes

Why FRC Teams Use It

  • Stronger than 10-32 hardware
  • Better for high-load applications
  • Less likely to strip in aluminum
  • Common for structural and mounting applications

Key Idea

1/4-20 hardware is used when additional strength and durability are needed. Its larger size makes it ideal for high-load joints and structural connections.

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