RAPI-Coil 6-32 UNC Thread Repair Kit Stainless Steel 304 High-Speed Steel M2

Adopt 135° top angle design, sharp and labor-saving to ensure the positioning of high-speed steel in the drilling hole. The cutting tap is made of has stainless steel, protect and maintain good threading from wear and tear. The installation tool finds the depth of the hole and fits each insert snugly into position. This tool snaps the tang off the end of the insert once it is in and locked in place.

First the damaged thread is cleared with a Standard Drill. All kits up to 12mm include correct drill to be used. No pre-drilling is required to repair a spark plug thread, if using the special Spark Plug Tap. Important - for using Flute less Taps bigger holes are required. Special STI (Screw Thread Insert) Taps to be used for cutting the holding thread into the cleared hole. It is recommended to use suitable branded cutting oil. Note : Thread and pitch of the tap to be checked with the bolt pitch and thread before tapping.

Insert is to be placed on Installation Tool and the adjustable ring positioned in a way so that the insert tang is centered in the tang slot. Insert to be winded in with a light downward pressure until a half turn below the surface. After finishing the above, Installation Tool is to be lifted up and tang is removed using the Tang Break Tool provided in kits up to 12mm. For bigger sizes and Spark Plug Taps, Long Nose Pliers are used for removing the tang.

After Insert Installation, the accuracy of the finished thread Is dependent upon many factors including the accuracy of the drilled and tapped hole. If the finished tapped hole gages satisfactorily, the installed insert will be within the thread tolerance. It is not at all necessary to gauge the installed Wire Thread Insert. After the insert is installed, the GO side measuring thread plug gage may not enter freely; However, the Insert will always seat itself when the bolt or screw is installed and tightened.