Helical Insert Repair Kits

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Thread Type Thread Type

	Installed Length Installed Length

	Number of Inserts Included Number of Inserts Included

288

	Thread Direction Thread Direction


Right Hand	Left Hand

	For Minimum Material Thickness For Minimum Material Thickness

	Drill Bit Size Drill Bit Size

	For Maximum Hole Diameter For Maximum Hole Diameter

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Pipe Size Pipe Size

	For Spark Plug Reach For Spark Plug Reach

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

Forward

How can we improve?

186 Products

Helical Inserts with Installation Tools

Shown with Five Inserts and Drill Bit

Shown with Five Inserts

Inserts come with a through-hole tap and 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.

Inch

18-8 Stainless Steel—Right-Hand Threaded
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
2-56	0.086"	3/32"	3/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	0000000
2-56	0.129"	3/32"	3/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
2-56	0.172"	3/32"	3/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
2-56	0.215"	3/32"	3/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
4-40	0.112"	No. 31	0.12"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
4-40	0.168"	No. 31	0.12"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
4-40	0.224"	No. 31	0.12"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
4-40	0.28"	No. 31	0.12"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
4-40	0.336"	No. 31	0.12"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
6-32	0.138"	No. 26	0.1495"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
6-32	0.207"	No. 26	0.1495"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
6-32	0.276"	No. 26	0.1495"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
6-32	0.345"	No. 26	0.1495"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
6-32	0.414"	No. 26	0.1495"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
8-32	0.164"	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
8-32	0.246"	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
8-32	0.328"	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
8-32	0.41"	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
8-32	0.492"	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-24	0.19"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-24	0.285"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-24	0.38"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-24	0.475"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-24	0.57"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-32	0.19"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-32	0.285"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-32	0.38"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-32	0.475"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
10-32	0.57"	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
12-24	0.324"	15/64"	15/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-20	1/4"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-20	3/8"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-20	1/2"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-20	5/8"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-20	3/4"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-28	1/4"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-28	3/8"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-28	1/2"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/4"-28	5/8"	17/64"	17/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-18	0.312"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-18	0.469"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-18	5/8"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-18	0.781"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-18	0.938"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-24	0.312"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-24	0.469"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
5/16"-24	5/8"	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-16	3/8"	25/64"	25/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-16	0.562"	25/64"	25/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-16	3/4"	25/64"	25/64"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-16	0.938"	25/64"	25/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-16	1 1/8"	25/64"	25/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-24	0.562"	25/64"	25/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
3/8"-24	3/4"	25/64"	25/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
7/16"-14	0.438"	29/64"	29/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
7/16"-14	0.656"	29/64"	29/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
7/16"-14	7/8"	29/64"	29/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
7/16"-20	0.438"	29/64"	29/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
7/16"-20	0.656"	29/64"	29/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-13	1/2"	17/32"	17/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-13	3/4"	17/32"	17/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-13	1"	17/32"	17/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-13	1 1/4"	17/32"	17/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-13	1 1/2"	17/32"	17/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-20	1/2"	17/32"	17/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-20	3/4"	33/64"	33/64"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
1/2"-20	1"	17/32"	17/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
9/16"-12	0.844"	19/32"	19/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
9/16"-18	0.844"	37/64"	37/64"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
5/8"-11	5/8"	21/32"	21/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
5/8"-11	0.938"	21/32"	21/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
5/8"-11	1 1/4"	21/32"	21/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
5/8"-18	5/8"	21/32"	21/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
5/8"-18	0.938"	41/64"	41/64"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
3/4"-10	3/4"	25/32"	25/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
3/4"-10	1 1/8"	25/32"	25/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
3/4"-10	1 1/2"	25/32"	25/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
3/4"-16	1 1/8"	49/64"	49/64"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
7/8"-9	1.312"	29/32"	29/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
7/8"-14	1.312"	57/64"	57/64"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1"-8	1 1/2"	1 1/32"	1 1/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1"-12	1 1/2"	1 1/64"	1 1/64"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1"-14	1 1/2"	1 1/64"	1 1/64"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1 1/8"-7	1.688"	1 5/32"	1 5/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1 1/8"-12	1.688"	1 5/32"	1 5/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1 1/4"-7	1 7/8"	1 9/32"	1 9/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1 1/4"-12	1 7/8"	1 9/32"	1 9/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1 1/2"-6	2 1/4"	1 17/32"	1 17/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1 1/2"-12	2 1/4"	1 17/32"	1 17/32"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
18-8 Stainless Steel—Left-Hand Threaded
1/4"-20	3/8"	17/64"	17/64"	6	Through-Hole Tap, Installation Tool	000000000	00000
1/4"-28	3/8"	17/64"	17/64"	6	Through-Hole Tap, Installation Tool	000000000	00000
5/16"-18	0.469"	21/64"	21/64"	6	Through-Hole Tap, Installation Tool	000000000	000000
5/16"-24	0.469"	21/64"	21/64"	6	Through-Hole Tap, Installation Tool	000000000	000000
3/8"-16	0.562"	25/64"	25/64"	6	Through-Hole Tap, Installation Tool	000000000	000000
3/8"-24	0.562"	25/64"	25/64"	6	Through-Hole Tap, Installation Tool	000000000	000000
1/2"-13	3/4"	17/32"	17/32"	4	Through-Hole Tap, Installation Tool	000000000	000000
1/2"-20	3/4"	33/64"	33/64"	4	Through-Hole Tap, Installation Tool	000000000	000000
5/8"-11	0.938"	21/32"	21/32"	2	Through-Hole Tap, Installation Tool	000000000	000000
5/8"-18	0.938"	41/64"	41/64"	2	Through-Hole Tap, Installation Tool	000000000	000000
3/4"-10	1 1/8"	25/32"	25/32"	2	Through-Hole Tap, Installation Tool	000000000	000000

Metric

18-8 Stainless Steel—Right-Hand Threaded
Thread Size	Thread Pitch, mm	Thread Spacing	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
M2.5	0.45	Coarse	3.8	No. 38	0.1015"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	0000000
M3	0.5	Coarse	3	1/8"	1/8"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M3	0.5	Coarse	4.5	1/8"	1/8"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M3	0.5	Coarse	6	1/8"	1/8"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M4	0.7	Coarse	4	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M4	0.7	Coarse	6	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M4	0.7	Coarse	8	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M4	0.7	Coarse	10	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M4	0.7	Coarse	12	11/64"	11/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M5	0.8	Coarse	5	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M5	0.8	Coarse	7.5	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M5	0.8	Coarse	10	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M5	0.8	Coarse	12.5	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M5	0.8	Coarse	15	13/64"	13/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M6	1	Coarse	6	1/4"	1/4"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M6	1	Coarse	9	1/4"	1/4"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M6	1	Coarse	12	1/4"	1/4"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M6	1	Coarse	15	1/4"	1/4"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M6	1	Coarse	18	1/4"	1/4"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M7	1	Coarse	10.5	9/32"	9/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M8	1	Fine	12	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M8	1.25	Coarse	8	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M8	1.25	Coarse	12	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M8	1.25	Coarse	16	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M8	1.25	Coarse	20	21/64"	21/64"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M8	1.25	Coarse	24	21/64"	21/64"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1	Extra Fine	15	13/32"	13/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1.25	Fine	10	13/32"	13/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M10	1.25	Fine	15	13/32"	13/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1.5	Coarse	10	13/32"	13/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1.5	Coarse	15	13/32"	13/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1.5	Coarse	20	13/32"	13/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1.5	Coarse	25	13/32"	13/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M10	1.5	Coarse	30	13/32"	13/32"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M12	1.25	Extra Fine	18	31/64"	31/64"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M12	1.5	Fine	18	31/64"	31/64"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M12	1.75	Coarse	18	31/64"	31/64"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	00000
M14	1.5	Fine	21	9/16"	9/16"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M14	2	Coarse	21	37/64"	37/64"	12	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M16	2	Coarse	24	21/32"	21/32"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M18	2.5	Coarse	27	47/64"	47/64"	6	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M20	2.5	Coarse	30	13/16"	13/16"	4	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
M24	3	Coarse	36	31/32"	31/32"	5	Through-Hole Tap, Installation Tool	000000000	000000
M30	3.5	Coarse	45	1 1/4"	1 1/4"	5	Through-Hole Tap, Installation Tool	000000000	000000
M36	4	Coarse	54	1 7/16"	1 7/16"	4	Through-Hole Tap, Installation Tool	000000000	000000

NPT

18-8 Stainless Steel—Right-Hand Threaded
Pipe Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
1/8	0.273"	3/8"	3/8"	12	Drill Bit, Through-Hole Tap, Installation Tool	000000000	0000000
1/4	0.394"	33/64"	33/64"	12	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
3/8	0.407"	21/32"	21/32"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000
1/2	0.534"	13/16"	13/16"	10	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000

Helical Insert Assortments with Installation Tools

Assortments include various sizes of helical inserts and a tap, a drill bit, and an installation tool for each thread size. Also known as Heli-Coil inserts, the inserts 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.

Inch
Includes	No. of Inserts Included	Thread Spacing	Drill Bit Size	For Max. Hole Dia.		Each
18-8 Stainless Steel
Prong Break-Off Tool 4-40 Thread × 0.112" Installed Lg. (12 Each) 4-40 Thread × 0.168" Installed Lg. (12 Each) 4-40 Thread × 0.224" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	No. 31	0.12"	000000000	000000
Prong Break-Off Tool 5-40 Thread × 1/8" Installed Lg. (12 Each) 5-40 Thread × 0.188" Installed Lg. (12 Each) 5-40 Thread × 1/4" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	No. 29	0.136"	000000000	000000
Prong Break-Off Tool 6-32 Thread × 0.138" Installed Lg. (12 Each) 6-32 Thread × 0.207" Installed Lg. (12 Each) 6-32 Thread × 0.276" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	No. 25	0.1495"	000000000	00000
Prong Break-Off Tool 6-40 Thread × 0.138" Installed Lg. (12 Each) 6-40 Thread × 0.207" Installed Lg. (12 Each) 6-40 Thread × 0.276" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Fine	No. 25	0.1495"	000000000	000000
Prong Break-Off Tool 8-32 Thread × 0.164" Installed Lg. (12 Each) 8-32 Thread × 0.246" Installed Lg. (12 Each) 8-32 Thread × 0.328" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	11/64"	11/64"	000000000	00000
Prong Break-Off Tool 8-36 Thread × 0.164" Installed Lg. (12 Each) 8-36 Thread × 0.246" Installed Lg. (12 Each) 8-36 Thread × 0.328" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Fine	No. 17	0.173"	000000000	000000
Prong Break-Off Tool 10-24 Thread × 0.19" Installed Lg. (12 Each) 10-24 Thread × 0.285" Installed Lg. (12 Each) 10-24 Thread × 0.38" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	13/64"	13/64"	000000000	00000
Prong Break-Off Tool 10-32 Thread × 0.19" Installed Lg. (12 Each) 10-32 Thread × 0.285" Installed Lg. (12 Each) 10-32 Thread × 0.38" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Fine	13/64"	13/64"	000000000	00000
Prong Break-Off Tool 12-24 Thread × 0.216" Installed Lg. (12 Each) 12-24 Thread × 0.328" Installed Lg. (12 Each) 12-24 Thread × 0.432" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	15/64"	15/64"	000000000	00000
Prong Break-Off Tool 1/4"-20 Thread × 1/4" Installed Lg. (12 Each) 1/4"-20 Thread × 3/8" Installed Lg. (12 Each) 1/4"-20 Thread × 1/2" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	17/64"	17/64"	000000000	00000
Prong Break-Off Tool 1/4"-28 Thread × 1/4" Installed Lg. (12 Each) 1/4"-28 Thread × 3/8" Installed Lg. (12 Each) 1/4"-28 Thread × 1/2" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Fine	17/64"	17/64"	000000000	00000
Prong Break-Off Tool 5/16"-18 Thread × 0.312" Installed Lg. (12 Each) 5/16"-18 Thread × 0.469" Installed Lg. (12 Each) 5/16"-18 Thread × 5/8" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	21/64"	21/64"	000000000	00000
Prong Break-Off Tool 5/16"-24 Thread × 0.312" Installed Lg. (12 Each) 5/16"-24 Thread × 0.469" Installed Lg. (12 Each) 5/16"-24 Thread × 5/8" Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Fine	21/64"	21/64"	000000000	00000
Prong Break-Off Tool 3/8"-16 Thread × 3/8" Installed Lg. (6 Each) 3/8"-16 Thread × 0.562" Installed Lg. (6 Each) 3/8"-16 Thread × 3/4" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	25/64"	25/64"	000000000	00000
Prong Break-Off Tool 3/8"-24 Thread × 3/8" Installed Lg. (6 Each) 3/8"-24 Thread × 0.562" Installed Lg. (6 Each) 3/8"-24 Thread × 3/4" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Fine	25/64"	25/64"	000000000	00000
Prong Break-Off Tool 7/16"-14 Thread × 0.438" Installed Lg. (6 Each) 7/16"-14 Thread × 0.656" Installed Lg. (6 Each) 7/16"-14 Thread × 7/8" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	29/64"	29/64"	000000000	00000
Prong Break-Off Tool 7/16"-20 Thread × 0.438" Installed Lg. (6 Each) 7/16"-20 Thread × 0.656" Installed Lg. (6 Each) 7/16"-20 Thread × 7/8" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Fine	29/64"	29/64"	000000000	00000
Prong Break-Off Tool 1/2"-13 Thread × 1/2" Installed Lg. (6 Each) 1/2"-13 Thread × 3/4" Installed Lg. (6 Each) 1/2"-13 Thread × 1" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	17/32"	17/32"	000000000	00000
Prong Break-Off Tool 1/2"-20 Thread × 1/2" Installed Lg. (6 Each) 1/2"-20 Thread × 3/4" Installed Lg. (6 Each) 1/2"-20 Thread × 1" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Fine	33/64"	33/64"	000000000	000000
1-64 Thread × 0.11" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 2-56 Thread × 0.129" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 3-48 Thread × 0.148" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 4-40 Thread × 0.168" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 6-32 Thread × 0.207" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 8-32 Thread × 0.246" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) Drill Bits Through-Hole Taps Installation Tools	288	Coarse	5/64" 3/32" No. 36 No. 31 No. 26 No. 17	5/64" 3/32" 0.1065" 0.12" 0.147" 0.173"	000000000	000000
10-32 Thread × 0.285" Installed Lg. (12 Each) 1/4"-28 Thread × 3/8" Installed Lg. (12 Each) 5/16"-24 Thread × 0.469" Installed Lg. (12 Each) 3/8"-24 Thread × 0.562" Installed Lg. (12 Each) 7/16"-20 Thread × 0.656" Installed Lg. (6 Each) 1/2"-20 Thread × 3/4" Installed Lg. (6 Each) Drill Bits Through-Hole Taps Installation Tools	60	Fine	13/64" 17/64" 21/64" 25/64" 29/64" 33/64"	13/64" 17/64" 21/64" 25/64" 29/64" 33/64"	000000000	000000
1/4"-20 Thread × 3/8" Installed Lg. (12 Each) 5/16"-18 Thread × 0.469" Installed Lg. (12 Each) 3/8"-16 Thread × 0.562" Installed Lg. (12 Each) 7/16"-14 Thread × 0.656" Installed Lg. (6 Each) 1/2"-13 Thread × 3/4" Installed Lg. (6 Each) 5/8"-11 Thread × 15/16" Installed Lg. (6 Each) Drill Bits Through-Hole Taps Installation Tools	54	Coarse	17/64" 21/64" 25/64" 29/64" 17/32" 21/32"	17/64" 21/64" 25/64" 29/64" 17/32" 21/32"	000000000	000000
Metric
18-8 Stainless Steel
Prong Break-Off Tool M4×0.7 mm Thread × 4 mm Installed Lg. (6 Each) M4×0.7 mm Thread × 6 mm Installed Lg. (6 Each) M4×0.7 mm Thread × 8 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	11/64"	11/64"	000000000	00000
Prong Break-Off Tool M5×0.8 mm Thread × 5 mm Installed Lg. (6 Each) M5×0.8 mm Thread × 7.5 mm Installed Lg. (6 Each) M5×0.8 mm Thread × 10 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	13/64"	13/64"	000000000	00000
Prong Break-Off Tool M6×1 mm Thread × 6 mm Installed Lg. (6 Each) M6×1 mm Thread × 9 mm Installed Lg. (6 Each) M6×1 mm Thread × 12 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	1/4"	1/4"	000000000	00000
Prong Break-Off Tool M10×1 mm Thread × 10 mm Installed Lg. (6 Each) M10×1 mm Thread × 15 mm Installed Lg. (6 Each) M10×1 mm Thread × 20 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Fine	13/32"	13/32"	000000000	000000
Prong Break-Off Tool M10×1.5 mm Thread × 10 mm Installed Lg. (6 Each) M10×1.5 mm Thread × 15 mm Installed Lg. (6 Each) M10×1.5 mm Thread × 20 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	13/32"	13/32"	000000000	00000
Prong Break-Off Tool M12×1.25 mm Thread × 12 mm Installed Lg. (6 Each) M12×1.25 mm Thread × 18 mm Installed Lg. (6 Each) M12×1.25 mm Thread × 24 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Extra Fine	31/64"	31/64"	000000000	000000
Prong Break-Off Tool M12×1.75 mm Thread × 12 mm Installed Lg. (6 Each) M12×1.75 mm Thread × 18 mm Installed Lg. (6 Each) M12×1.75 mm Thread × 24 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	31/64"	31/64"	000000000	00000
M3×0.5 mm Thread × 3 mm Installed Lg. (12 Each) M3×0.5 mm Thread × 4.5 mm Installed Lg. (12 Each) M3×0.5 mm Thread × 6 mm Installed Lg. (12 Each) Drill Bit Through-Hole Tap Installation Tool	36	Coarse	1/8"	1/8"	000000000	000000
M5×0.8 mm Thread × 7.5 mm Installed Lg. (12 Each) M6×1 mm Thread × 9 mm Installed Lg. (12 Each) M8×1.25 mm Thread × 12 mm Installed Lg. (12 Each) M10×1.5 mm Thread × 15 mm Installed Lg. (12 Each) Drill Bits Through-Hole Taps Installation Tools	48	Coarse	13/64" 1/4" 21/64" 13/32"	13/64" 1/4" 21/64" 13/32"	000000000	000000
M7×1 mm Thread × 7 mm Installed Lg. (6 Each) M7×1 mm Thread × 10.5 mm Installed Lg. (6 Each) M7×1 mm Thread × 14 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	9/32"	9/32"	000000000	00000
M8×1.25 mm Thread × 8 mm Installed Lg. (6 Each) M8×1.25 mm Thread × 12 mm Installed Lg. (6 Each) M8×1.25 mm Thread × 16 mm Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool	18	Coarse	21/64"	21/64"	000000000	00000

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.

18-8 Stainless Steel
Includes	No. of Inserts Included		Each
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	00000

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.

18-8 Stainless Steel
Includes	No. of Inserts Included		Each
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