Powercoil – 1/4″ x 20 STI HSS Cobalt UNC Spiral Point Tap

Description

1/4″ x 20 STI HSS Cobalt UNC Spiral Point Tap
Unified National Coarse (UNC).
HSS-Co Spiral Point (Gun Nose) 3B Tolerance Screw Thread Insert (STI) Tap.
PowerCoil wire thread inserts are installed into oversize tapped holes.
Only PowerCoil STI (Screw Thread Insert) Taps are suitable for use with PowerCoil Wire Thread Inserts.
STI Taps have a larger diameter, than standard taps, but the same pitch to accommodate the wire thread insert. Once the insert is installed in the tapped hole it creates the desired internal thread tolerance for the installed bolt or stud.
Category: Threaded Inserts, PowerCoil , STI Taps, Machine Taps, UNC
Pitch (tpi): 20
Lead: Spiral Point