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.