Our Location
304 North Cardinal St.
Dorchester Center, MA 02124
Perma-Plug®
KATO Perma-Plug® spark plug thread repair kits are designed to permanently repair stripped or damaged spark plug threads in aluminum and cast iron cylinder heads without removing the head from the engine. Unlike many thread repair systems, Perma-Plug uses a solid steel insert that expands during installation to create a positive mechanical lock. The repair is permanent, heat resistant, and capable of withstanding the extreme temperatures and pressures found in automotive engines.
Ideal for professional mechanics, repair shops, and DIY enthusiasts, each kit includes everything needed to complete the repair including a piloted tap, swaging tool, and three insert lengths for short, standard, and long reach spark plugs.
KATO Perma-Plug Kit are made from the high quality all steel components and includes:
Three solid bushing inserts (one each)
- 2214-S, M14X1.25 X 3/8” for short reach
- 2214-N, M14X1.25 X 1/2” for normal reach
- 2214-L, M14X1.25 X 3/4” for long reach
- Expanding tool (swaging tool)
- Piloted Tap
Additional inserts can be purchased separately as listed above (2214-S, 2214-N, or 2214-L).
Why Choose Perma-Plug?
Frequently Asked Questions (FAQs)
Yes. Perma-Plug is designed to repair damaged spark plug threads while the cylinder head remains on the engine in many applications.
Yes. It is designed for both aluminum and cast iron cylinder heads.
Yes. Every kit includes the piloted tap, swaging tool, and three insert lengths.
Yes. Short, normal, and long reach inserts are available separately.
Our cancellation policy allows you to cancel your subscription at any time through your account settings. Regarding refunds, our policy is we offer a 30-day money-back guarantee. Please refer to our Terms of Service Page for complete details.
Our standard hours of operation are Monday to Friday, 9:00 AM to 5:00 PM in Pacific Standard Time (PST).