Why are some thread inserts larger in diameter than the tapped hole before installation?

Selected thread inserts have a slightly larger diameter than the diameter of the tapped hole before installation, as the installation tool decreases the leading coil's diameter when it applies torque to the insert's prong / tang for easy installation. Once the threaded insert is installed, it acts like a spring and expands outward onto the material for strong anchoring.

How to choose the length of a helical insert?

The helical insert length should be at least as long as the desired screw diameter. Users may also choose inserts having longer lengths for increased strength. The exact insert length can vary depending upon the application & the material being installed into the insert. Materials like steel do not need long inserts. In contrast, for soft materials like aluminium, a longer insert is preferred.

How to install a helical thread insert?

Drill a hole according to the length of the insert / screw / bolt using the suggested drill bit size. Thread the drilled hole using a tap (sold separately), then wind the insert into the hole using an installation tool. Use a prong break-off tool or punch to remove the prong and allow free passage of the fastener.

How to install a key-locking thread insert?

Drill a hole according to the required application. Tap the drilled hole, then wind the insert into the hole. Drive the key into the material using the installation tool & hammer.

Can thread inserts be removed once installed?

Yes, some thread inserts can be removed using removal tools that attach to them & unwind them in the direction opposite to that used during installation.

Thread Inserts

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Thread inserts are suitable for installing threaded fasteners in soft materials, thin materials or materials with a stripped & threaded hole. They are ideal for automobile, aerospace and...Read more

CHRISLYNN -

Grade 304 Stainless Steel Thread Inserts

Style	Model	Thread Size	Drill Size	Number Of Pieces	Material	Price (inc. VAT)	Pkg. Qty.
A	83100	#2-56	3/32"	12	Stainless Steel	-	12	RFQ
A	83102	#3-48	#36	12	Stainless Steel	-	12	RFQ
A	83103	#3-56	#37	12	Stainless Steel	-	12	RFQ
A	83104	#4-40	#31	12	Stainless Steel	-	12	RFQ
A	83105	#4-48	#31	12	Stainless Steel	-	12	RFQ
A	83106	#5-40	#29	12	Stainless Steel	-	12	RFQ
A	83108	#6-32	#25	12	Stainless Steel	-	12	RFQ
A	83109	#6-40	#25	12	Stainless Steel	-	12	RFQ
A	83110	#8-32	11/64"	12	Stainless Steel	-	12	RFQ
A	83111	#8-36	#17	12	Stainless Steel	-	12	RFQ
A	83112	#10-24	13/64"	12	Stainless Steel	-	12	RFQ
A	83113	#10-32	13/64"	12	Stainless Steel	-	12	RFQ
A	83114	#12-24	15/64"	12	Stainless Steel	-	12	RFQ
A	83115	#12-28	15/64"	12	Stainless Steel	-	12	RFQ
A	83144	1 1/2"-6	1 17/32"	1	Stainless Steel	-	1	RFQ
A	83145	1 1/2"-12	1 17/32"	1	Stainless Steel	-	1	RFQ
A	83140	1 1/4"-7	1 9/32"	1	Stainless Steel	-	1	RFQ
A	83141	1 1/4"-12	1 9/32"	1	Stainless Steel	-	1	RFQ
A	83138	1 1/8"-7	1 5/32"	1	Stainless Steel	-	1	RFQ
A	83139	1 1/8"-12	1 5/32"	1	Stainless Steel	-	1	RFQ
A	83142	1 3/8"-6	1 13/32"	1	Stainless Steel	-	1	RFQ
A	83143	1 3/8"-12	1 13/32"	1	Stainless Steel	-	1	RFQ
A	83135	1"-8	1 1/32"	1	Stainless Steel	-	1	RFQ
B	83735	1"-8	1 1/32"	4	Stainless Steel	£104.10	4
B	83636	1"-10	1 1/32"	4	Stainless Steel	£90.41	4

E-Z LOK -

Brass Thread Inserts

Style	Model	Drill Size	Internal Thread Size	Thread Type	Fins	Type	Material	Price (inc. VAT)	Pkg. Qty.
A	170-006-BR	#5	#6-32	Coarse	1	-	Brass	£25.58	50
B	270-006-BR	#5	#6-32	Coarse	2	-	Brass	£30.00	50
C	9400-5	1/2"	5/16"-18	-	-	-	Brass	-	1	RFQ
C	9400-624	1/2"	3/8"-24	-	-	-	Brass	-	1	RFQ
C	9400-524	1/2"	5/16"-24	-	-	-	Brass	-	1	RFQ
C	9400-6	1/2"	3/8"-16	-	-	-	Brass	-	1	RFQ
C	9400-M8	1/2"	M8 x 1.25	-	-	-	Brass	-	1	RFQ
C	9400-006	1/4"	#6-32	-	-	-	Brass	-	1	RFQ
C	9400-M4	1/4"	M4 x 0.7	-	-	-	Brass	-	1	RFQ
C	9400-004	1/4"	#4-40	-	-	-	Brass	-	1	RFQ
D	1GUC9	1/4"	#10-32	Coarse	-	Reverse Slot	Brass	£21.61	25
C	9400-M3	1/4"	M3 x 0.5	-	-	-	Brass	-	1	RFQ
C	9400-008	1/4"	#8-32	-	-	-	Brass	-	1	RFQ
E	1GUC5	1/8"	#2-56	Coarse	-	Reverse Slot	Brass	£16.55	50
C	9400-428	3/8"	1/4"-28	-	-	-	Brass	-	1	RFQ
C	9400-4	3/8"	1/4"-20	-	-	-	Brass	-	1	RFQ
C	9400-3	3/8"	#10-24	-	-	-	Brass	-	1	RFQ
C	9400-M5	3/8"	M5 x 0.8	-	-	-	Brass	-	1	RFQ
C	9400-332	3/8"	#10-32	-	-	-	Brass	-	1	RFQ
C	9400-M6	3/8"	M6 x 1	-	-	-	Brass	-	1	RFQ
F	1GUC6	3/16"	#4-40	Coarse	-	Reverse Slot	Brass	£15.69	50
G	1GUC7	3/16"	#6-32	Coarse	-	Reverse Slot	Brass	£17.22	50
H	1GUD1	5/16"	1/4"-20	Coarse	-	Reverse Slot	Brass	£20.56	25
I	1GUC8	7/32"	#8-32	Coarse	-	Reverse Slot	Brass	£19.63	50
J	370-332-BR	11/32"	#10-32	Fine	3	-	Brass	£51.26	50

CHRISLYNN -

Grade 303 Stainless Steel Thread Inserts

Style	Model	Thread Size	Drill Size	Internal Thread Size	Material
A	76283	#8-32	#29	#2-56	Stainless Steel	RFQ
A	64901	#10-24, #10-32, 1/2"-13, 1/2"-20, 1/4"-20, 1/4"-28, 3/8"-16, 3/8"-24, 5/16"-18, 5/16"-24, 7/16"-14, 7/16"-20	-	-	Stainless Steel	RFQ
A	64906	#10-24, #10-32, 1/2"-13, 1/2"-20, 1/4"-20, 1/4"-28, 3/8"-16, 3/8"-24, 5/16"-18, 5/16"-24, 7/16"-14, 7/16"-20	-	-	Stainless Steel	RFQ
B	9303-004	#10-32	5/32"	#4-40	Stainless Steel	RFQ
A	76284	#10-32	#20	#4-40	Stainless Steel	RFQ
A	76285	#12-28	3/16"	#6-32	Stainless Steel	RFQ
C	76543	1 1/2"-12	1 5/16"	#1-12	Stainless Steel	RFQ
A	76343	1 1/2"-12	1 7/16"	1"-8	Stainless Steel	RFQ
C	76541	1 1/4"-12	1 3/16"	3/4"-16	Stainless Steel	RFQ
A	76341	1 1/4"-12	1 3/16"	3/4"-10	Stainless Steel	RFQ
A	76310	1 1/4"-12	1 3/16"	7/8"-9	Stainless Steel	RFQ
A	76510	1 1/4"-12	1 3/16"	7/8"-14	Stainless Steel	RFQ
A	76509	1 1/8"-12	1 1/16"	3/4"-16	Stainless Steel	RFQ
A	76309	1 1/8"-12	1 1/16"	3/4"-10	Stainless Steel	RFQ
C	76542	1 3/8"-12	1 5/16"	7/8"-14	Stainless Steel	RFQ
A	76311	1 3/8"-12	1 5/16"	1"-8	Stainless Steel	RFQ
A	76342	1 3/8"-12	1 5/16"	7/8"-9	Stainless Steel	RFQ
A	76511	1 3/8"-12	1 5/16"	#1-12	Stainless Steel	RFQ
B	9303-12	1"-8	7/8"	3/4"-10	Stainless Steel	RFQ
A	76340	1"-12	15/16"	5/8"-11	Stainless Steel	RFQ
C	76540	1"-12	15/16"	5/8"-18	Stainless Steel	RFQ
D	76524	1/2"-13	29/64"	3/8"-24	Stainless Steel	RFQ
A	76503	1/2"-13	29/64"	5/16"-24	Stainless Steel	RFQ
B	9303-524	1/2"-13	27/64"	5/16"-24	Stainless Steel	RFQ
B	9303-5	1/2"-13	27/64"	5/16"-18	Stainless Steel	RFQ

CHRISLYNN -

Grade C1215 Carbon Steel Thread Inserts

Style	Model	Thread Size	Drill Size	Internal Thread Size	Material
A	64900	#10-24, #10-32, 1/2"-13, 1/2"-20, 1/4"-20, 1/4"-28, 3/8"-16, 3/8"-24, 5/16"-18, 5/16"-24, 7/16"-14, 7/16"-20	-	-	Carbon Steel	RFQ
A	64905	#10-24, #10-32, 1/2"-13, 1/2"-20, 1/4"-20, 1/4"-28, 3/8"-16, 3/8"-24, 5/16"-18, 5/16"-24, 7/16"-14, 7/16"-20	-	-	Carbon Steel	RFQ
B	65943	1 1/2"-12	1 7/16"	1"-8	Carbon Steel	RFQ
B	65913	1 1/2"-12	1 7/16"	1 1/8"-7	Carbon Steel	RFQ
C	66113	1 1/2"-12	1 7/16"	1 1/8"-12	Carbon Steel	RFQ
C	66143	1 1/2"-12	1 5/16"	#1-12	Carbon Steel	RFQ
C	66110	1 1/4"-12	1 3/16"	7/8"-14	Carbon Steel	RFQ
B	65941	1 1/4"-12	1 3/16"	3/4"-10	Carbon Steel	RFQ
C	66141	1 1/4"-12	1 3/16"	3/4"-16	Carbon Steel	RFQ
B	65910	1 1/4"-12	1 3/16"	7/8"-9	Carbon Steel	RFQ
B	65909	1 1/8"-12	1 1/16"	3/4"-10	Carbon Steel	RFQ
C	66109	1 1/8"-12	1 1/16"	3/4"-16	Carbon Steel	RFQ
C	66112	1 3/8"-12	1 5/16"	1"-14	Carbon Steel	RFQ
C	66111	1 3/8"-12	1 5/16"	#1-12	Carbon Steel	RFQ
B	65942	1 3/8"-12	1 5/16"	7/8"-9	Carbon Steel	RFQ
B	65911	1 3/8"-12	1 5/16"	1"-8	Carbon Steel	RFQ
C	66142	1 3/8"-12	1 5/16"	7/8"-14	Carbon Steel	RFQ
C	66114	1 5/8"-12	1 9/16"	1 1/4"-12	Carbon Steel	RFQ
B	65914	1 5/8"-12	1 9/16"	1 1/4"-7	Carbon Steel	RFQ
C	66116	1 7/8"-12	1 13/16"	1 1/2"-12	Carbon Steel	RFQ
B	65916	1 7/8"-12	1 13/16"	1 1/2"-6	Carbon Steel	RFQ
C	66140	1"-12	15/16"	5/8"-18	Carbon Steel	RFQ
B	65940	1"-12	15/16"	5/8"-11	Carbon Steel	RFQ
B	65903	1/2"-13	29/64"	5/16"-18	Carbon Steel	RFQ
C	66134	1/2"-13	29/64"	1/4"-28	Carbon Steel	RFQ

CHRISLYNN -

Grade 12L14 Steel Thread Inserts

Style	Model	Drill Size	Internal Thread Size	Material
A	9329-006	#7	#6-32	Steel	RFQ
A	9329-1414	1 7/64"	7/8"-14	Steel	RFQ
A	9329-14	1 7/64"	7/8"-9	Steel	RFQ
A	9329-1614	1 9/32"	1"-14	Steel	RFQ
A	9329-16	1 9/32"	1"-8	Steel	RFQ
A	9329-3	5/16"	#10-24	Steel	RFQ
A	9329-332	5/16"	#10-32	Steel	RFQ
A	9329-004	5/32"	#4-40	Steel	RFQ
A	9329-12	7/8"	3/4"-10	Steel	RFQ
B	9335-10	7/8"	5/8"-11	Steel	RFQ
A	9329-1216	7/8"	3/4"-16	Steel	RFQ
B	9329-1406	11/16"	M14 x 1.25	Steel	RFQ
B	9329-1408	11/16"	M14 x 1.25	Steel	RFQ
B	9329-1412	11/16"	M14 x 1.25	Steel	RFQ
B	9750-14	16.5 mm	M14 x 1.25	Steel	RFQ
A	9329-720	17/32"	7/16"-20	Steel	RFQ
A	9329-7	17/32"	7/16"-14	Steel	RFQ
B	9335-6	17/32"	3/8"-16	Steel	RFQ
A	9329-9	21/32"	9/16"-12	Steel	RFQ
A	9329-820	21/32"	1/2"-20	Steel	RFQ
A	9329-801	21/32"	1/2"-13	Steel	RFQ
A	9329-8	21/32"	1/2"-13	Steel	RFQ
A	9329-918	21/32"	9/16"-18	Steel	RFQ
A	9329-428	23/64"	1/4"-28	Steel	RFQ
A	9329-4	23/64"	1/4"-20	Steel	RFQ

HELICOIL -

High Speed Steel Thread Inserts

Style	Model	Thread Size	Overall Length	Drill Size	Finish	Thread Length	Shank Dia.	Number Of Flutes	Thread Direction	Price (inc. VAT)
A	328-8	1/2"-14	-	45/64"	Bright	1 3/8"	57/64"	5	Right Hand	£342.19
A	328-4	1/4"-18	2 1/2"	-	Uncoated	1 1/16"	11/16"	4	Right Hand	£105.13
A	328-2	1/8"-27	-	-	Uncoated	1 1/16"	9/16"	4	Right Hand	£81.80
A	328-6	3/8"-18	3 1/8"	9/16"	Uncoated	1 3/8"	11/16"	4	Right Hand	£172.51

E-Z LOK -

Grade 18-8 Stainless Steel Thread Inserts
Grade 18-8 stainless steel thread inserts, also known as flanged threaded inserts, are small cylindrical metal fasteners used to reinforce and strengthen threaded holes in various materials such as aluminium, magnesium or plastic.

Style	Model	Drill Size	Type	Thread Type	Material	Price (inc. VAT)	Pkg. Qty.
A	260-332CR	1/4"	Flange	Coarse	Stainless Steel	£20.34	10
B	240-332CR	1/4"	Flush	Coarse	Stainless Steel	£20.74	10
C	240-002CR	1/8"	Flush	Coarse	Stainless Steel	£18.29	10
D	260-002CR	1/8"	Flange	Coarse	Stainless Steel	£24.41	25
E	240-5CR	3/8"	Flush	Coarse	Stainless Steel	£32.01	10
F	240-006CR	3/16"	Flush	Coarse	Stainless Steel	£10.25	10
G	260-006CR	3/16"	Flange	Coarse	Stainless Steel	£14.09	10
H	240-4CR	5/16"	Flush	Coarse	Stainless Steel	£25.14	10
I	260-4CR	5/16"	Flange	Coarse	Stainless Steel	£19.78	5
J	240-004CR	5/32"	Flush	Coarse	Stainless Steel	£8.98	10
K	260-004CR	5/32"	Flange	Coarse	Stainless Steel	£16.39	10
L	240-6CR	7/16"	Flush	Coarse	Stainless Steel	£19.79	5
M	240-008CR	7/32"	Flush	Coarse	Stainless Steel	£16.64	10
N	260-008CR	7/32"	Flange	Coarse	Stainless Steel	£17.12	10

VOLKEL -

Thread Insert, From Stainless Steel, M 14 x 1.5 - 2.5D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
07526	CM4RCK	£0.73	1

VOLKEL -

Thread Insert, From Stainless Steel, M 3 x 0.5 - 3D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
07605	CM4RDG	£0.21	1

VOLKEL -

Thread Insert, From Stainless Steel, M 10 x 1.5 - 1D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
05215	CM4QTD	£0.27	1

VOLKEL -

Thread Insert, From Stainless Steel, M 2.5 x 0.45 - 3D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
07604	CM4RDF	£0.21	1

VOLKEL -

Thread Insert, From Stainless Steel, M 8 x 1.25 - 1D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
05211	CM4QTC	£0.22	1

VOLKEL -

Thread Insert, From Stainless Steel, UNF 5/16 x 24 - 1.5D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
08326	CM4RMW	£0.25	1

VOLKEL -

Thread Insert, From Stainless Steel, UNC 5/16 x 18 - 2D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
08408	CM4RQG	£0.29	1

VOLKEL -

Refill, From Stainless Steel, BSF 1/4 x 26 - 1.5D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
44363	CM6FHQ	£4.67	1

VOLKEL -

Thread Insert, From Stainless Steel, M 4 x 0.7 - 3D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
07607	CM4RDJ	£0.19	1

VOLKEL -

Thread Insert, From Stainless Steel, M 14 x 2.0 - 2.5D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
07525	CM4RCJ	£0.73	1

VOLKEL -

Thread Insert, From Stainless Steel, UNC No. 12 x 24 - 2D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
08406	CM4RQE	£0.21	1

VOLKEL -

Thread Insert, From Stainless Steel, M 12 x 1.0 - 2.5D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
07524	CM4RCH	£0.53	1

VOLKEL -

Thread Insert, From Stainless Steel, UNC No. 10 x 24 - 2D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
08405	CM4RQD	£0.19	1

VOLKEL -

Refill, From Stainless Steel, M 2.2 x 0.45 - 1.5D Size

Model	Item	Price (inc. VAT)	Pkg. Qty.
40303	CM6EWU	£8.10	1

12...60 61

Thread Inserts

Thread inserts are suitable for installing threaded fasteners in soft materials, thin materials or materials with a stripped & threaded hole. They are ideal for automobile, aerospace and maintenance applications. Raptor Supplies offers these thread inserts from brands like Grainger, Chrislynn, Helicoil, E-Z Lok & Walter. They provide more strength, versatility & resilient operation than traditional threaded holes.

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Thread Inserts

Grade 304 Stainless Steel Thread Inserts

Brass Thread Inserts

Grade 303 Stainless Steel Thread Inserts

Grade C1215 Carbon Steel Thread Inserts

Grade 12L14 Steel Thread Inserts

High Speed Steel Thread Inserts

Grade 18-8 Stainless Steel Thread Inserts
Grade 18-8 stainless steel thread inserts, also known as flanged threaded inserts, are small cylindrical metal fasteners used to reinforce and strengthen threaded holes in various materials such as aluminium, magnesium or plastic.

Thread Insert, From Stainless Steel, M 14 x 1.5 - 2.5D Size

Thread Insert, From Stainless Steel, M 3 x 0.5 - 3D Size

Thread Insert, From Stainless Steel, M 10 x 1.5 - 1D Size

Thread Insert, From Stainless Steel, M 2.5 x 0.45 - 3D Size

Thread Insert, From Stainless Steel, M 8 x 1.25 - 1D Size

Thread Insert, From Stainless Steel, UNF 5/16 x 24 - 1.5D Size

Thread Insert, From Stainless Steel, UNC 5/16 x 18 - 2D Size

Refill, From Stainless Steel, BSF 1/4 x 26 - 1.5D Size

Thread Insert, From Stainless Steel, M 4 x 0.7 - 3D Size

Thread Insert, From Stainless Steel, M 14 x 2.0 - 2.5D Size

Thread Insert, From Stainless Steel, UNC No. 12 x 24 - 2D Size

Thread Insert, From Stainless Steel, M 12 x 1.0 - 2.5D Size

Thread Insert, From Stainless Steel, UNC No. 10 x 24 - 2D Size

Refill, From Stainless Steel, M 2.2 x 0.45 - 1.5D Size

Thread Inserts

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Thread Inserts

Grade 304 Stainless Steel Thread Inserts

Brass Thread Inserts

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Grade C1215 Carbon Steel Thread Inserts

Grade 12L14 Steel Thread Inserts

High Speed Steel Thread Inserts

Grade 18-8 Stainless Steel Thread Inserts Grade 18-8 stainless steel thread inserts, also known as flanged threaded inserts, are small cylindrical metal fasteners used to reinforce and strengthen threaded holes in various materials such as aluminium, magnesium or plastic.

Thread Insert, From Stainless Steel, M 14 x 1.5 - 2.5D Size

Thread Insert, From Stainless Steel, M 3 x 0.5 - 3D Size

Thread Insert, From Stainless Steel, M 10 x 1.5 - 1D Size

Thread Insert, From Stainless Steel, M 2.5 x 0.45 - 3D Size

Thread Insert, From Stainless Steel, M 8 x 1.25 - 1D Size

Thread Insert, From Stainless Steel, UNF 5/16 x 24 - 1.5D Size

Thread Insert, From Stainless Steel, UNC 5/16 x 18 - 2D Size

Refill, From Stainless Steel, BSF 1/4 x 26 - 1.5D Size

Thread Insert, From Stainless Steel, M 4 x 0.7 - 3D Size

Thread Insert, From Stainless Steel, M 14 x 2.0 - 2.5D Size

Thread Insert, From Stainless Steel, UNC No. 12 x 24 - 2D Size

Thread Insert, From Stainless Steel, M 12 x 1.0 - 2.5D Size

Thread Insert, From Stainless Steel, UNC No. 10 x 24 - 2D Size

Refill, From Stainless Steel, M 2.2 x 0.45 - 1.5D Size

Thread Inserts

Frequently Asked Questions

Why are some thread inserts larger in diameter than the tapped hole before installation?

How to choose the length of a helical insert?

How to install a helical thread insert?

How to install a key-locking thread insert?

Can thread inserts be removed once installed?

We are here to help!

Looking for a part not listed here?

Popular Search Queries

Explore More

Grade 18-8 Stainless Steel Thread Inserts
Grade 18-8 stainless steel thread inserts, also known as flanged threaded inserts, are small cylindrical metal fasteners used to reinforce and strengthen threaded holes in various materials such as aluminium, magnesium or plastic.