Check the listing for details. (12) 1/4-20 x 2D UNC 18-8 S/S Free Running Wire Insert. Condition: New. Listed at 10.00 USD. 1/4-20 x 2D UNC 18-8 S/S Free Running Wire Insert UNSPSC23291804ManufacturerFNL® Product AttributesDiameter1/4"Drill Size17/64"Grade18-8Length0.500"MaterialStainless SteelMinimum Hole Depth0.925"StyleFree RunningSystem of MeasurementImperial (Inch)ThreadCoarseThread Size20TypeWire Threaded InsertProduct Weight0.0351 NotesCoil (helical) thread repair insert designed to repair or reinforce tapped holes in soft metals, like aluminum, magnesium, and cast iron.Quick and simple repairs to tapped holes in metal; Lightweight and inexpensive design; Superior thread with greater holding power Used to repair or reinforce tapped holes in soft metals, such as aluminum, magnesium, and cast iron. To repair a tapped hole, simply overdrill and retap the hole with the appropriate STI tap. Thread the insert into place with the appropriately sized installation tool.