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Chart Guide for FULL-TORQUE® - Spark Plug Inserts

Spark Plug Thread Repair Inserts Chart

Thin Wall Sparkplug Inserts
Internal Thread Size	STYLE	Thread OD	O.A.L.	Application	Kit Part Number	Insert Part Number
12mm x 1.25	FFT	0.638	0.645	Aluminum	FFT4.512125LK	FFT4.512125L
12mm x 1.25	FFT	0.638	0.400	Aluminum	FFT4.5S12125LK	FFT4.5S12125L
14mm x 1.25	FFT	0.700	0.703	Cast Iron	FFT514125K	FFT514125
14mm x 1.25	FFT(AN)	0.700	0.700	Aluminum	FFT514125LK	FFT514125L
14mm x 1.25	FFT(AN)	0.700	0.700	Deep Reach Aluminum	FFT514125LDK	FFT514125LD
14mm x 1.25	FFT	0.703	0.700	Deep Reach Cast Iron	FFT514125DK	FFT514125D
14mm x 1.25	FFT	0.703	0.450	Cast Iron	FFT5S14125K	FFT5S14125
14mm x 1.25	FFT(AN)	0.700	0.450	Aluminum	FFT5S14125LK	FFT5S14125L
14mm x 1.25	FFT(AN)	0.735	0.700	Aluminum Oversized	FFT514125LOK	FFT514125LO
18mm X 1.50	FFT	0.855	0.420	Cast Iron	FFT618150K	FFT618150
18mm X 1.50	FFT(AN)	0.855	0.420	Aluminum	FFT618150LK	FFT618150L
7/8"-18	FST	1.095	1.000	Cast Iron	FST8SP002K	FST8SP002
7/8"-18	FST	1.095	1.100	Cast Iron	FST8SP003K	FST8SP003

FFT Style Fully Threaded Insert

Combination Thin Wall Sparkplug Insert Kits
Kit Part Number	Description
FFT514125LCK	14mm x 1.25 Thin wall aluminum combination kit
FFT514125SCK	14mm x 1.25 Thin wall steel combination kit
FFT514125CK	14mm x 1.25 Thin wall aluminum and steel combination kit
FFT514125LTK	Ford Triton Fully Threaded style aluminum kit
FFT514125LDTK	Ford Triton Deep Reach style aluminum kit

Heavy wall inserts are large enough to repair a hole that had failed a solid or coil type insert

FFT Deep Reach Thin Wall Insert

Heavy Wall Sparkplug Inserts
Internal Thread Size	STYLE	Thread OD	O.A.L.	Application	Kit Part Number	Insert Part Number
14mm x 1.25	FST	0.735	0.750	Cast Iron	FST514125K	FST514125
14mm x 1.25	FST(AN)	0.735	0.750	Aluminum	FST514125LK	FST514125L
14mm x 1.25	FST(AN)	0.735	0.750	Deep Reach Aluminum	FST514125LDK	FST514125LD
14mm x 1.25	FST	0.735	0.750	Deep Reach Cast Iron	FST514125DK	FST514125D
14mm x 1.25	FST	0.735	0.450	Cast Iron	FST5S14125K	FST5S14125
14mm x 1.25	FST	0.860	0.700	Conversion 18 to 14mm Cast Iron	FST614125K	FST614125
7/8 - 18	FST	1.095	0.700	Cast Iron	FST87818K	FST87818

All inserts work with both tapered seal and gasket seal type spark plugs

Sparkplug Insert Installation Tooling
Item description	Use with Insert	Part Number
Installation Tool	All 12mm x 1.25 Inserts	FT4.512125T
Installation Tool	All 14mm x 1.25 Inserts	FT514125T
Installation Tool	All 18mm x 1.50 Inserts	FT618150T
Installation Tool	All 7/8"-18 Inserts	FT87818T
1/16" Drill Tube	All Sparkplug Inserts	FT116DT
1/16" Extension Drill Bit	All Sparkplug Inserts	FT116EXD
37/64" Piloted Core Drill	All 12mm x 1.25 Inserts	FT3764CD
41/64" Piloted Core Drill	All 14mm x 1.25 Inserts	FT4164CD
51/64" Piloted Core Drill	All 18mm x 1.50 Inserts	FT5164CD
Counterbore cutter for 37/64" Core Drill	All FFT 12mm x 1.25 Inserts	FT12125CC
Counterbore cutter for 41/64" Core Drill	All FFT 14mm x 1.25 Inserts	FT14125CC
Spotfacer Shell Cutter	All FST style 14mm x 1.25 Inserts	FT14125SC
Height Gage	All FST style 14mm x 1.25 Inserts	FT14125HG
Spotfacer Extension	All Spotfacers with 1/2" Shank	FT500DXT
Locking Pins	All .700" Long Sparkplug Inserts	FR116516
Locking Pins	All Short Sparkplug Inserts	FR116316
Alignment Bushing for the Core Drill	Ford Triton Heads	FT54164AB
Alignment Bushingfor the Tap	Ford Triton Heads	FT5RPLTAB
FT4.5 Tap	All 12mm x 1.25 Thin Wall Inserts	FT4.5PLT
FT4 Tap	All 12mm x 1.25 Heavy Wall Inserts	FT4PLT
FT5 Tap	All FST style 14mm x 1.25 Inserts	FT5PLT
FT5R Tap	All FFT 14mm x 1.25 Inserts	FT5RPLT
FT6 Tap	All FST style 18mm x 1.50 Inserts	FT6PLT
FT8 Tap	All FST 7/8"-18 Inserts	FT8FT

FFT(AN): AN stand for Anodized

All dimensions are in Imperial – Inches unless otherwise stated

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