Dry Film Lubricated Fasteners

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How to Install Helical Inserts

About Helical Insert Length

A dry film keeps the screw from sticking or binding in these inserts during installation. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

Inserts that meet DIN 8140 adhere to international standards for dimensions.

For technical drawings and 3-D models, click on a part number.

Inch

Inserts								Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
2-56	0.086"	No. 41	0.096"	MIL-I-8846, MS122-095	1	000000000	00000	000000000	000000	000000000	000000	000000000	000000	000000000	0000000
2-56	0.129"	No. 41	0.096"	MIL-I-8846, MS122-135	1	000000000	0000	000000000	00000	000000000	00000	000000000	00000	000000000	000000
2-56	0.172"	No. 41	0.096"	MIL-I-8846, MS122-175	1	000000000	0000	000000000	00000	000000000	00000	000000000	00000	000000000	000000
4-40	0.112"	No. 31	0.12"	MIL-I-8846, MS122-076	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
4-40	0.168"	No. 31	0.12"	MIL-I-8846, MS122-116	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
4-40	0.224"	No. 31	0.12"	MIL-I-8846, MS122-156	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
6-32	0.138"	No. 25	0.1495"	MIL-I-8846, MS122-078	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
6-32	0.207"	No. 25	0.1495"	MIL-I-8846, MS122-118	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
6-32	0.276"	No. 25	0.1495"	MIL-I-8846, MS122-158	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
10-24	0.285"	No. 5	0.2055"	MIL-I-8846, MS122-120	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.19"	13/64"	13/64"	MIL-I-8846, MS124-655	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.285"	13/64"	13/64"	MIL-I-8846, MS124-695	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.38"	13/64"	13/64"	MIL-I-8846, MS124-735	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	1/4"	H	0.266"	MIL-I-8846, MS122-081	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	3/8"	H	0.266"	MIL-I-8846, MS122-121	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	1/2"	H	0.266"	MIL-I-8846, MS122-161	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	0.312"	Q	0.332"	MIL-I-8846, MS120-082	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	0.469"	Q	0.332"	MIL-I-8846, MS122-121	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	5/8"	Q	0.332"	MIL-I-8846, MS122-162	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Metric

Inserts									Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
Thread Size	Thread Pitch, mm	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
M2.5	0.45	2.5	No. 37	0.104"	DIN 8140, MIL-I-8846, SAE MA3280-101	1	000000000	00000	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
M2.5	0.45	5	No. 37	0.104"	DIN 8140, MIL-I-8846, SAE MA3280-201	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M3	0.5	3	3.2 mm	3.2mm	DIN 8140, MIL-I-8846, SAE MA3280-102	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M3	0.5	4.5	3.2 mm	3.2mm	DIN 8140, MIL-I-8846, SAE MA3280-152	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M3	0.5	6	3.2 mm	3.2mm	DIN 8140, MIL-I-8846, SAE MA3280-202	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M4	0.7	4	No. 19	0.166"	DIN 8140, MIL-I-8846, SAE MA3280-104	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	6	No. 19	0.166"	DIN 8140, MIL-I-8846, SAE MA3280-154	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	8	No. 19	0.166"	DIN 8140, MIL-I-8846, SAE MA3280-204	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M5	0.8	5	5.3 mm	5.3mm	DIN 8140, MIL-I-8846, SAE MA3280-105	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M5	0.8	7.5	5.3 mm	5.3mm	DIN 8140, MIL-I-8846, SAE MA3280-155	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	6	6.3 mm	6.3mm	DIN 8140, MIL-I-8846, SAE MA3280-106	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	9	6.3 mm	6.3mm	DIN 8140, MIL-I-8846, SAE MA3280-156	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	12	6.3 mm	6.3mm	DIN 8140, MIL-I-8846, SAE MA3280-206	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	8	8.4 mm	8.4mm	MIL-I-8846, SAE MA3280-109	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	12	8.4 mm	8.4mm	DIN 8140, MIL-I-8846, SAE MA3280-159	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	16	8.4 mm	8.4mm	DIN 8140, MIL-I-8846, SAE MA3280-209	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Lubricated Stainless Steel Helical Inserts for Dissimilar Metals

Eliminating the need for primer, these inserts are coated to resist corrosion when installed in different materials. They also prevent the screw from sticking or binding in the insert during installation. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

Inserts that meet DIN 8140 adhere to international standards for dimensions.

For technical drawings and 3-D models, click on a part number.

Inch

Inserts							Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
2-56	0.086"	No. 41	0.096"	1	000000000	00000	000000000	000000	000000000	000000	000000000	000000	000000000	0000000
2-56	0.172"	No. 41	0.096"	1	000000000	0000	000000000	00000	000000000	00000	000000000	00000	000000000	000000
4-40	0.112"	No. 31	0.12"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
4-40	0.168"	No. 31	0.12"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
4-40	0.224"	No. 31	0.12"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
6-32	0.138"	No. 25	0.1495"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
6-32	0.207"	No. 25	0.1495"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
6-32	0.276"	No. 25	0.1495"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
10-24	0.285"	No. 5	0.2055"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.19"	13/64"	13/64"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.285"	13/64"	13/64"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.38"	13/64"	13/64"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	1/4"	H	0.266"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	3/8"	H	0.266"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	1/2"	H	0.266"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	0.312"	Q	0.332"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	0.469"	Q	0.332"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	5/8"	Q	0.332"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Metric

Inserts									Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
Thread Size	Thread Pitch, mm	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
M3	0.5	4.5	3.2 mm	3.2mm	DIN 8140	1	000000000	00000	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
M3	0.5	6	3.2 mm	3.2mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M4	0.7	4	No. 19	0.166"	__	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	6	No. 19	0.166"	__	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	8	No. 19	0.166"	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M5	0.8	5	5.3 mm	5.3mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M5	0.8	7.5	5.3 mm	5.3mm	__	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M5	0.8	10	5.3 mm	5.3mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	9	6.3 mm	6.3mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	12	6.3 mm	6.3mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	8	8.4 mm	8.4mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	12	8.4 mm	8.4mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	16	8.4 mm	8.4mm	DIN 8140	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Lubricated Stainless Steel Screw-Locking Helical Inserts

A dry film keeps the screw from sticking or binding in these inserts during installation, yet a distorted thread grips the screw to resist loosening. 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

Inserts that meet DIN 8140 adhere to international standards for dimensions.

For technical drawings and 3-D models, click on a part number.

Inch

Inserts								Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
2-56	0.086"	No. 41	0.096"	MS21209C0210L, NASM21209	5	000000000	00000	000000000	000000	000000000	000000	000000000	000000	000000000	0000000
2-56	0.129"	No. 41	0.096"	MS21209C0215L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	00000	000000000	000000
2-56	0.172"	No. 41	0.096"	MS21209C0220L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	00000	000000000	000000
4-40	0.112"	No. 31	0.12"	MS21209C0410L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
4-40	0.168"	No. 31	0.12"	MS21209C0415L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
4-40	0.224"	No. 31	0.12"	MS21209C0420L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
6-32	0.138"	No. 25	0.1495"	MS21209C0610L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
6-32	0.207"	No. 25	0.1495"	MS21209C0615L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
6-32	0.276"	No. 25	0.1495"	MS21209C0620L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
10-24	0.285"	No. 5	0.2055"	MS21209C1-15L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.19"	13/64"	13/64"	MS21209F1-10L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.285"	13/64"	13/64"	MS21209F1-15L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
10-32	0.38"	13/64"	13/64"	MS21209F1-20L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	3/8"	H	0.266"	MS21209C4-15L, NASM21209	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1/4"-20	1/2"	H	0.266"	MS21209C4-20L, NASM21209	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	0.469"	Q	0.332"	MS21209C5-15L, NASM21209	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
5/16"-18	5/8"	Q	0.332"	MS21209C5-20L, NASM21209	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Metric

Inserts									Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
Thread Size	Thread Pitch, mm	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
M2.5	0.45	3.8	No. 37	0.104"	DIN 8140, SAE MA3330-151	1	000000000	00000	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
M4	0.7	4	No. 19	0.166"	DIN 8140, SAE MA3330-104	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	6	No. 19	0.166"	DIN 8140, SAE MA3330-154	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	8	No. 19	0.166"	DIN 8140, SAE MA3330-204	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M5	0.8	5	5.3 mm	5.3mm	SAE MA3330-105	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M5	0.8	7.5	5.3 mm	5.3mm	DIN 8140, SAE MA3330-155	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M5	0.8	10	5.3 mm	5.3mm	DIN 8140, SAE MA3330-205	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	6	6.3 mm	6.3mm	SAE MA3330-106	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	9	6.3 mm	6.3mm	DIN 8140, SAE MA3330-156	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M6	1	12	6.3 mm	6.3mm	DIN 8140, SAE MA3330-206	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	8	8.4 mm	8.4mm	DIN 8140, SAE MA3330-109	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	12	8.4 mm	8.4mm	DIN 8140, SAE MA3330-159	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Lubricated Stainless Steel Helical Inserts without Prong

A dry film keeps the screw from sticking or binding in these inserts during installation. Without a prong to break off and retrieve, they are often used where debris could cause damage. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. Installation requires a drill bit, a helical insert tap, and an installation tool.

For technical drawings and 3-D models, click on a part number.

Inserts							Through-Hole Taps		Closed-End Hole Taps		Installation Tools
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Pkg. Qty.		Pkg.		Each		Each		Each
18-8 Stainless Steel
2-56	0.086"	No. 41	0.096"	5	000000000	00000	000000000	000000	000000000	000000	000000000	0000000
2-56	0.129"	No. 41	0.096"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
2-56	0.172"	No. 41	0.096"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
4-40	0.112"	No. 31	0.12"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
4-40	0.168"	No. 31	0.12"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
4-40	0.224"	No. 31	0.12"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
6-32	0.138"	No. 25	0.1495"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
6-32	0.207"	No. 25	0.1495"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
6-32	0.276"	No. 25	0.1495"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
8-32	0.164"	No. 16	0.177"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
8-32	0.246"	No. 16	0.177"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
8-32	0.328"	No. 16	0.177"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
10-32	0.19"	13/64"	13/64"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
10-32	0.285"	13/64"	13/64"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
10-32	0.38"	13/64"	13/64"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
1/4"-20	1/4"	H	0.266"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
1/4"-20	3/8"	H	0.266"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000
1/4"-20	1/2"	H	0.266"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000