Thread Repair Coil Inserts

Coil inserts are helically coiled diamond-shaped wire that is inserted into an oversized tapped hole. Once in place, they will bring the inside thread of the coil back to the original thread size. Coil inserts can be used for repair of damaged threads, or for new installations to provide greater thread strength due to their high percentage of thread engagement. Made from corrosion resistant 18-8 stainless steel, these coil inserts can withstand temperatures up to 800°F. Available in both imperial and metric kits that provide inserts, a tap and installation tool. If more coils are needed, we also offer individual packs of coil inserts.

Products
Application Data
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsCoil Threaded Inserts for Metal - Imperial

Coil Thread Inserts for Metal dimensions

Internal Thread	A	Free Coils	B
Internal Thread	Length		Free Outer Diameter
Imperial Coarse			Free Outer Diameter
Imperial Coarse			Min	Max
2-56	0.129	5.250	0.109	0.113
3-48	0.148	5.000	0.126	0.134
4-40	0.168	4.750	0.144	0.149
5-40	0.188	5.500	0.157	0.165
6-32	0.207	4.750	0.178	0.183
8-32	0.246	6.000	0.205	0.210
10-24	0.285	5.000	0.240	0.248
12-24	0.324	6.000	0.268	0.275
1/4-20	0.375	5.750	0.314	0.322
5/16-18	0.469	6.625	0.384	0.392
3/8-16	0.563	7.250	0.455	0.463
7/16-14	0.656	7.375	0.530	0.538
1/2-13	0.750	7.875	0.600	0.610
9/16-12	0.844	8.250	0.667	0.679
5/8-11	0.938	8.500	0.742	0.752
3/4-10	1.125	9.375	0.880	0.892
7/8-9	1.313	10.000	1.019	1.033
1-8	1.500	10.125	1.162	1.179
1 1/8-7	1.688	9.875	1.315	1.355
1 1/4-7	1.875	11.250	1.443	1.483
1 3/8-6	2.063	10.500	1.598	1.643
1 1/2-6	2.250	11.500	1.716	1.728

All dimensions are in inches.

Internal Thread	A	Free Coils	B
Internal Thread	Length		Free Outer Diameter
Imperial Fine			Free Outer Diameter
Imperial Fine			Min	Max
4-48	0.168	5.625	0.139	0.147
6-40	0.207	6.000	0.170	0.178
8-36	0.246	6.500	0.200	0.208
10-32	0.285	6.875	0.233	0.241
1/4-28	0.375	8.250	0.299	0.307
5/16-24	0.469	8.875	0.370	0.378
3/8-24	0.563	11.000	0.433	0.441
7/16-20	0.656	10.625	0.507	0.515
1/2-20	0.750	12.375	0.567	0.577
9/16-18	0.844	12.500	0.630	0.642
5/8-18	0.938	14.125	0.694	0.706
3/4-16	1.125	15.125	0.831	0.841
7/8-14	1.313	15.000	0.968	0.983
1-14	1.500	19.000	1.097	1.110
1-12	1.500	16.000	1.108	1.120
1 1/8-12	1.688	17.250	1.304	1.334
1 1/4-12	1.875	19.375	1.439	1.469
1 3/8-12	2.063	21.375	1.484	1.496
1 1/2-12	2.250	23.500	1.710	1.745

All dimensions are in inches.

Dimensional SpecificationsCoil Threaded Inserts for Metal - Metric

Internal Thread	A	Free Coils	B
Internal Thread	Length		Free Outer Diameter
Metric Coarse			Free Outer Diameter
Metric Coarse			Min	Max
M2-0.4	3mm	4.9mm	2.6mm	2.8mm
M2.5-04	3.75mm	5.9mm	3.3mm	3.5mm
M3-0.5	4.5mm	6.3mm	3.8mm	4mm
M3.5-0.6	5.25mm	6.3mm	4.55mm	4.75mm
M4-0.7	6mm	6.1mm	5.15mm	5.35mm
M5-0.8	7.5mm	6.9mm	6.35mm	6.6mm
M6-1.0	9mm	6.9mm	7.6mm	7.85mm
M7-1.0	10.5mm	8.2mm	8.65mm	8.9mm
M8-1.25	12mm	7.4mm	9.85mm	10.1mm
M10-1.50	15mm	8.1mm	12.1mm	12.5mm
M11-1.50	16.5mm	9mm	13.1mm	13.5mm
M12-1.75	18mm	8.4mm	14.4mm	14.8mm
M14-2.0	21mm	8.3mm	17.2mm	17.7mm
M16-2.0	24mm	9.7mm	19.4mm	19.9mm
M18-2.5	27mm	9mm	21.5mm	22mm
M20-2.5	30mm	10mm	23.7mm	24.2mm
M22-2.5	33mm	10.9mm	26.3mm	26.8mm
M24-3.0	36mm	10mm	28.6mm	29.1mm
M27-3.0	40.5mm	11.4mm	32.2mm	32.7mm
M30-3.5	45mm	11mm	35.2mm	35.7mm
M33-3.5	49.5mm	12.2mm	38.3mm	38.8mm
M36-4.0	54mm	11mm	42.1mm	42.6mm
M39-4.0	58.5mm	12.2mm	45.1mm	45.6mm

All dimensions are in millimeters.

Internal Thread	A	Free Coils	B
Internal Thread	Length		Free Outer Diameter
Metric Fine			Free Outer Diameter
Metric Fine			Min	Max
M8-1.0	12mm	9.5mm	9.85mm	10.1mm
M10-1.25	15mm	9.7mm	12.1mm	12.5mm
M12-1.5	18mm	6.2mm	14.4mm	14.8mm
M14-1.5	21mm	7.4mm	17.2mm	17.7mm
M16-1.5	24mm	13mm	19.4mm	19.9mm
M18-2.0	27mm	11.2mm	21.5mm	22mm
M20-2.0	30mm	12.5mm	23.7mm	24.2mm
M22-2.0	33mm	13.6mm	26.3mm	26.8mm
M24-2.0	36mm	15mm	28.6mm	29.1mm

All dimensions are in millimeters.

Thread Repair Coil Inserts

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Diameter	Length	Type	Item #	Availability	Price	Quantity
#4	0.1642	Insert Only	COIL4-40INS	In Stock	$7.32127/PK	PK	PK
#4	0.1642	Kit	COIL4-40	In Stock	$51.99541/EA	EA	EA
#6	0.2105	Kit	COIL6-32	In Stock	$37.12317/EA	EA	EA
#6	0.2105	Insert Only	COIL6-32INS	In Stock	$8.98651/PK	PK	PK
#8	0.2344	Insert Only	COIL8-32INS	In Stock	$7.13465/PK	PK	PK
#8	0.2344	Kit	COIL8-32	In Stock	$40.31008/EA	EA	EA
#10	0.2813	Insert Only	COIL10-24INS	In Stock	$13.42951/PK	PK	PK
#10	0.2813	Kit	COIL10-24	In Stock	$38.21418/EA	EA	EA
#10	0.2813	Insert Only	COIL10-32INS	In Stock	$9.46503/PK	PK	PK
#10	0.2813	Kit	COIL10-32	In Stock	$47.63135/EA	EA	EA
#12	0.3281	Kit	COIL12-24	In Stock	$42.56388/EA	EA	EA
#12	0.3281	Insert Only	COIL12-24INS	In Stock	$10.26414/PK	PK	PK
1/4	0.3750	Insert Only	COIL025-20INS	In Stock	$7.57011/PK	PK	PK
1/4	0.3750	Kit	COIL025-20	In Stock	$38.66207/EA	EA	EA
1/4	0.3750	Insert Only	COIL025-28INS	In Stock	$8.32616/PK	PK	PK
1/4	0.3750	Kit	COIL025-28	In Stock	$45.62159/EA	EA	EA
5/16	0.4688	Insert Only	COIL031-18INS	In Stock	$11.31209/PK	PK	PK
5/16	0.4688	Kit	COIL031-18	In Stock	$46.47336/EA	EA	EA
5/16	0.4688	Insert Only	COIL031-24INS	In Stock	$9.79041/PK	PK	PK
5/16	0.4688	Kit	COIL031-24	In Stock	$45.93741/EA	EA	EA
3/8	0.5625	Insert Only	COIL037-16INS	In Stock	$11.48435/PK	PK	PK
3/8	0.5625	Kit	COIL037-16	In Stock	$51.49297/EA	EA	EA
3/8	0.5625	Kit	COIL037-24	In Stock	$51.67959/EA	EA	EA
3/8	0.5625	Insert Only	COIL037-24INS	3-5 Working Days	$12.38875/PK	PK	PK
7/16	0.6563	Kit	COIL043-14	In Stock	$60.85271/EA	EA	EA
7/16	0.6563	Insert Only	COIL043-14INS	In Stock	$6.63221/PK	PK	PK
7/16	0.6563	Insert Only	COIL043-20INS	In Stock	$12.7907/PK	PK	PK
7/16	0.6563	Kit	COIL043-20	In Stock	$63.77643/EA	EA	EA
1/2	0.7500	Kit	COIL050-13	In Stock	$69.12145/EA	EA	EA
1/2	0.7500	Insert Only	COIL050-13INS	In Stock	$9.07264/PK	PK	PK
1/2	0.7500	Kit	COIL050-20	In Stock	$74.97367/EA	EA	EA
1/2	0.7500	Insert Only	COIL050-20INS	3-5 Working Days	$9.80477/PK	PK	PK
9/16	0.8438	Kit	COIL056-12	In Stock	$90.55412/EA	EA	EA
9/16	0.8438	Insert Only	COIL056-12INS	In Stock	$20.29859/PK	PK	PK
9/16	0.8438	Insert Only	COIL056-18INS	In Stock	$15.82926/PK	PK	PK
9/16	0.8438	Kit	COIL056-18	In Stock	$95.79386/EA	EA	EA
5/8	0.9375	Insert Only	COIL062-11INS	In Stock	$20.93023/PK	PK	PK
5/8	0.9375	Kit	COIL062-11	In Stock	$98.94726/EA	EA	EA
5/8	0.9375	Insert Only	COIL062-18INS	3-5 Working Days	$17.31266/PK	PK	PK
5/8	0.9375	Kit	COIL062-18	In Stock	$95.11915/EA	EA	EA
3/4	1.1250	Kit	COIL075-10	In Stock	$117.52799/EA	EA	EA
3/4	1.1250	Insert Only	COIL075-10INS	In Stock	$28.02182/PK	PK	PK
3/4	1.1250	Kit	COIL075-16	In Stock	$133.80706/EA	EA	EA
3/4	1.1250	Insert Only	COIL075-16INS	In Stock	$28.39506/PK	PK	PK
7/8	1.3125	Kit	COIL087-09	In Stock	$218.64772/EA	EA	EA
7/8	1.3125	Insert Only	COIL087-09INS	In Stock	$36.83606/PK	PK	PK
1	1.5000	Insert Only	COIL100-08INS	In Stock	$41.65949/PK	PK	PK
1	1.5000	Kit	COIL100-08	In Stock	$238.90324/EA	EA	EA
1	1.5000	Insert Only	COIL100-14INS	In Stock	$45.62159/PK	PK	PK
1 1/8	1.6875	Kit	COIL112-07	In Stock	$333.99368/EA	EA	EA
1 1/8	1.6875	Insert Only	COIL112-07INS	3-5 Working Days	$28.39027/EA	EA	EA
1 1/4	1.8750	Kit	COIL125-07	In Stock	$346.1671/EA	EA	EA
1 3/8	2.0625	Insert Only	COIL137-06INS	In Stock	$236.63508/PK	PK	PK
1 3/8	2.0625	Kit	COIL137-06	In Stock	$442.17628/EA	EA	EA
1 1/2	2.2500	Kit	COIL150-06	In Stock	$600.94746/EA	EA	EA
1 1/2	2.2500	Insert Only	COIL150-06INS	3-5 Working Days	$148.34912/PK	PK	PK
M4	6 mm	Kit	COILM4-070	In Stock	$36.06087/EA	EA	EA
M4	6 mm	Insert Only	COILM4-070INS	In Stock	$0.76064/EA	EA	EA
M5	7.5 mm	Kit	COILM5-080	In Stock	$51.20106/EA	EA	EA
M5	7.5 mm	Insert Only	COILM5-080INS	In Stock	$7.40741/PK	PK	PK
M6	9 mm	Kit	COILM6-100	In Stock	$45.9087/EA	EA	EA
M6	9 mm	Insert Only	COILM6-100INS	In Stock	$7.70169/PK	PK	PK
M8	12 mm	Insert Only	COILM8-125INS	In Stock	$9.58943/PK	PK	PK
M8	12 mm	Kit	COILM8-125	In Stock	$53.44051/EA	EA	EA
M10	15 mm	Insert Only	COILM10-100INS	3-5 Working Days	$8.90037/PK	PK	PK
M10	15 mm	Kit	COILM10-100	In Stock	$61.90066/EA	EA	EA
M10	15 mm	Kit	COILM10-125	In Stock	$59.55593/EA	EA	EA
M10	15 mm	Kit	COILM10-150	In Stock	$63.21418/EA	EA	EA
M10	15 mm	Insert Only	COILM10-150INS	In Stock	$13.02326/PK	PK	PK
M12	18 mm	Kit	COILM12-125	In Stock	$83.46253/EA	EA	EA
M12	18 mm	Kit	COILM12-150	In Stock	$66.20729/EA	EA	EA
M12	18 mm	Kit	COILM12-175	In Stock	$70.02584/EA	EA	EA
M12	18 mm	Insert Only	COILM12-175INS	In Stock	$21.94467/PK	PK	PK
M14	21 mm	Kit	COILM14-125	In Stock	$111.10155/EA	EA	EA
M14	21 mm	Kit	COILM14-150	In Stock	$96.21972/EA	EA	EA
M14	21 mm	Insert Only	COILM14-200INS	In Stock	$20.21246/PK	PK	PK
M14	21 mm	Kit	COILM14-200	In Stock	$95.62877/EA	EA	EA
M16	24 mm	Kit	COILM16-150	In Stock	$97.47344/EA	EA	EA
M16	24 mm	Insert Only	COILM16-150INS	In Stock	$21.92076/PK	PK	PK
M16	24 mm	Kit	COILM16-200	In Stock	$111.11111/EA	EA	EA
M16	24 mm	Insert Only	COILM16-200INS	In Stock	$21.17786/PK	PK	PK
M20	30 mm	Insert Only	COILM20-150INS	3-5 Working Days	$9.25782/EA	EA	EA
M20	30 mm	Kit	COILM20-150	3-5 Working Days	$325.75366/EA	EA	EA
M20	30 mm	Insert Only	COILM20-250INS	3-5 Working Days	$527.27534/EA	EA	EA
M20	30 mm	Kit	COILM20-250	In Stock	$158.92908/EA	EA	EA

Thread Repair Coil Inserts

Technical Data

Application Data

InstallationCoil Threaded Insert for Metal

Dimensional Specifications

Dimensional SpecificationsCoil Threaded Inserts for Metal - Imperial

Dimensional SpecificationsCoil Threaded Inserts for Metal - Metric

Diameter

Thread Pitch

Length

Thread Type

Inch or Metric