Powercoil Metric, UNC, UNF, BSW, BSF, BSP, BA, BSC, NPT Wire Thread Inserts

Product ID: Powercoil Metric

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Powercoil Free Running Inserts

Power Coil Free Running Inserts provide strong permanent internal threads that resist heat and corrosion. Once fitted, their position is maintained by the action of radial pressure between their coils and the flanks of the tapped hole. This pressure exists because the free diameter of Powercoil Free Running Inserts is larger by a calculated amount than their installed diameter.


Powercoil Screw Locking Inserts

Power Coil Screw Locking (or prevailing torque) Inserts are of particular value in applications subject to the effects of cyclic vibration or impact. In addition to the benefits afforded by free running inserts, Powercoil Screw Locking Inserts offer the additional security of prevailing locking torque.

This is achieved by the action of one or more polygonal grip coils positioned within the Power Coil insert's length, which exerts radial pressure on the male thread. Each grip coil on Powercoil Screw Locking Inserts consists of a number of tangential locking chords which protrude inside the minor diameter of the normal free running coils. As the male thread passes through these grip coils, the locking flats are displaced, exerting radial pressure or prevailing torque on the male thread.

On removal of the male thread, the locking coils in Powercoil Screw Locking Inserts relax to their original form, permitting repeated assembly whilst retaining a measurable level of prevailing torque.

Powercoil Wire Thread Insert Thread Types

Power Coil screw thread inserts come in the following thread types.

Metric Coarse & Fine
Spark Plug
Unified National Coarse (UNC) & Unified National Fine (UNF)
British Standards (BSW, BSF, BSP, BA, BSC)
National Pipe Taper (NPT)
8-UN Constant Pitch

Powercoil Wire Thread Insert Thread Length

Powercoil Screw Thread Insert lengths are calculated in multiples of the nominal thread size, or diameter, of the insert. Five insert lengths (1D, 1.5D, 2D, 2.5D and 3D) are available for each thread size.

Power Coil inserts are fully compatible with others such as Emhart Helicoil, Alcoa Recoil, Voelkel V-Coil, VCoil, V Coil, Armstrong Armacoil, Filtec, Kato Coilthread, Timesert, WTI

Main Products

Power Coil Screw Thread Inserts, Loksert Keylocking Inserts