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Size = 6-32 x .525" STI SHCS T20 Hexalobular Bit (Included) Head Diameter = .273" Head Length = .162" PreCoil Socket Head Cap Screws are purpose-built for STI (Screw Thread Insert) tapped holes — the oversized internal threads you cut before installing a Heli-Coil.
Instead of running standard threads, only to later blow-out to STI sized,
