Heli-coil 3G-OTH-262164 — Technical Specifications

The HELI-COIL Screw Thread Insert STI Tap (Straight Flute, MPN 8187-14) is a general-purpose STI tap for 7/8"-9 UNC threads, featuring H3 / 3B tolerance, 4 flutes, and a plug chamfer. 3G Electric interprets this demand and sources the genuine OEM tool, supporting your thread-repair or installation needs across 14 industrial departments — with specialist depth in combustion, pumps, and controls.