1-64 Inserts | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

1-64

	Thread Size Thread Size	Hide

	Drill Bit Size Drill Bit Size

	Number of Inserts Included Number of Inserts Included

288

	For Maximum Hole Diameter For Maximum Hole Diameter

Less than 0.25"

	Threaded Insert Type Threaded Insert Type

	Helical

	Material Material

Stainless Steel

	Installed Length Installed Length

Less than 0.25"

	Helical Insert Style Helical Insert Style

With Prong

Without Prong

	Thread Direction Thread Direction

	Right Hand

	For Use In For Use In

Metal

	Thread Spacing Thread Spacing

Coarse

	Thread Type Thread Type

UNC

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

RoHS Compliant

	Passivation Passivation

Not Passivated

	For Tap Type For Tap Type

Helical

	Tensile Strength Tensile Strength

160,000 psi or greater

	End Type End Type

Open

	For System of Measurement For System of Measurement

Inch

Metric

	For Thread Direction For Thread Direction

Right Hand

Left Hand

	For Helical Insert Style For Helical Insert Style

With Prong

Without Prong

	For Threaded Insert Type For Threaded Insert Type

Helical

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

REACH Compliant

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18 Products

How to Install Helical Inserts

About Helical Insert Length

Also known as Heli-Coil inserts, these 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

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—Right-Hand Threaded
1-64	0.073"	No. 46	0.081"	10	000000000	00000	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
1-64	0.11"	No. 46	0.081"	10	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1-64	0.146"	No. 46	0.081"	10	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Stainless Steel Screw-Locking Helical Inserts

A distorted thread grips the screw to resist loosening. Also known as Heli-Coil inserts, these 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. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

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
1-64	0.073"	No. 46	0.081"	5	000000000	000000	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
1-64	0.11"	No. 46	0.081"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

Stainless Steel Helical Inserts without Prong

Without a prong to break off and retrieve, these inserts 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.

Add an extraction tool to remove these inserts.

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

Inch

Inserts							Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Extraction Tools
Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Pkg. Qty.		Pkg.		Each		Each		Each		Each
18-8 Stainless Steel
1-64	0.073"	No. 46	0.081"	5	000000000	00000	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
1-64	0.11"	No. 46	0.081"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
1-64	0.146"	No. 46	0.081"	5	000000000	0000	000000000	00000	000000000	00000	000000000	000000	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
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	0000000

Installation Tools for Helical Inserts

Screw an insert onto these tools and drive them a quarter to half-turn below the material’s surface. They’re compatible with helical inserts that have a prong.

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

Inch

For Right-Hand Thread
For Thread Size	Style		Each
1-64	A	000000000	0000000

Prong Break-Off Tools for Helical Inserts

Place the tip of these tools into installed inserts and push down to trigger the spring-loaded punch to break off the prong.

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

Inch

For Thread Size		Each
1-64	000000000	0000000

Extraction Tools for Helical Inserts

Place the tip of these tools into an insert and strike a light blow to the tool’s head. Then turn the tools counterclockwise with pressure to extract the insert.

For Thread Size		Each
1-64, 1-72, M2	000000000	0000000

Installation Tools for Helical Inserts without Prong

Screw an insert onto these tools and drive them a quarter to half-turn below the material’s surface.

Tools with a hollow handle store the tip.

Replacement tips (sold separately) include one installation tip, two pins, and two springs.

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

Inch

Installation Tools					Replacement Tips
For Thread Size	Style	Features		Each		Each
1-64	A	Hollow Handle	000000000	0000000	000000000	000000

Extraction Tools for Helical Inserts without Prong

Thread these tools into an insert and turn counterclockwise to extract.

Tools with a hollow handle store the tip.

Replacement tips (sold separately) come with one removal tip, two pins, and two springs.

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

Inch

Extraction Tools			Replacement Tips
For Thread Size		Each		Each
1-64	000000000	0000000	000000000	000000