Yardley TRISERT Coarse Threaded Inserts are internally and externally threaded metal inserts designed for maximum holding power in thermoplastics, thermoset plastics, soft metals and wood.
The wider spaced external threads reduce installation torque and provide a stronger hold.
Installation is simple, as three external flutes provide full cutting action, while retaining chips to keep inside threads clean. No special tooling is needed to install these inserts.
||1/4-20 US Threads
|Outside Diameter (B)
|Length Tolerance (C)
||+.000 -.010 in
|Outside Thread (D)
|(+/- .005) (E)
||Soft Metals, Thermoplastics, Thermoset Plastics, Wood
|Starting Hole Size Thermo-Plastics
||.330 to .336
|Starting Hole Size Thermosets
||.336 to .343