Spark Plug Thread Repair Kits
Kits include helical inserts, a tap, and an installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
| Includes | No. of Inserts Included | Each | |
18-8 Stainless Steel  | |||
|---|---|---|---|
| M14×1.25 mm Thread × 3/8" Insert Reach (6 Each) M14×1.25 mm Thread × 7/16" Insert Reach (6 Each) M14×1.25 mm Thread × 0.472" Insert Reach (6 Each) M14×1.25 mm Thread × 1/2" Insert Reach (6 Each) M14×1.25 mm Thread × 3/4" Insert Reach (6 Each) Through-Hole Tap Installation Tool | 30 | 000000000 | 0000000 |
| M18×1.5 mm Thread × 1/2" Insert Reach (24 Each) Through-Hole Tap Installation Tool | 24 | 000000000 | 000000 |
Spark Plug Thread Repair Kits for Gasket-Seat and Taper-Seat Ports
These kits have short-, normal-, and long-reach inserts, an installation tool, and a tap.
| Includes | No. of Inserts Included | Each | |
18-8 Stainless Steel | |||
|---|---|---|---|
| M14×1.25 mm Thread × Short Insert Reach (1 Each) M14×1.25 mm Thread × Normal Insert Reach (1 Each) M14×1.25 mm Thread × Long Insert Reach (1 Each) Through-Hole Tap Installation Tool | 3 | 000000000 | 000000 |
| M14×1.25 mm Thread × Short Insert Reach (6 Each) M14×1.25 mm Thread × Normal Insert Reach (6 Each) M14×1.25 mm Thread × Long Insert Reach (6 Each) Through-Hole Tap Installation Tool | 18 | 000000000 | 000000 |
Black-Phosphate Steel Easy-to-Install Thread-Locking Inserts
A black-phosphate finish provides mild corrosion resistance. Also known as E-Z Lok, these inserts use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours. Installation requires a drill bit and a standard tap. Then set the insert with a bolt and two nuts, or use an installation bit.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
For Tap | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Thread Spacing | Thread Size | Thread Pitch, mm | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | |
Black-Phosphate Steel with Thick Wall | ||||||||||
| M14 | 1.25 | Extra Fine | 3/4"-16 | __ | 21/64" | 11/16" | 11/16" | 5 | 000000000 | 000000 |
| M14 | 1.25 | Extra Fine | 3/4"-16 | __ | 29/64" | 11/16" | 11/16" | 5 | 000000000 | 0000 |
| M14 | 1.25 | Extra Fine | 3/4"-16 | __ | 45/64" | 11/16" | 11/16" | 1 | 000000000 | 0000 |
| M14 | 1.25 | Extra Fine | M18 | 1.5 | 11.5mm | 16.5 mm | 16.5mm | 1 | 000000000 | 0000 |