Nickel Helicoils | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Thread Type Thread Type

UNC

Metric

UNF

	Material Material	Show

Nickel

	Material Material	Hide

	Installed Length Installed Length

	Thread Direction Thread Direction

	Right Hand

	For Minimum Material Thickness For Minimum Material Thickness

	Helical Insert Style Helical Insert Style

With Prong

	For Tap Type For Tap Type

Helical

	Drill Bit Size Drill Bit Size

	For Maximum Hole Diameter For Maximum Hole Diameter

	Tensile Strength Tensile Strength

200,000 psi

	Thread Spacing Thread Spacing

Coarse

Fine

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

RoHS Compliant

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78 Products

How to Install Helical Inserts

About Helical Insert Length

Made of nickel alloy, these inserts are more resistant to acids and salt water than stainless steel inserts. 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.

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
Nickel Alloy
2-56	0.129"	No. 41	0.096"	1	000000000	00000	000000000	000000	000000000	000000	000000000	000000	000000000	000000
6-32	0.138"	No. 25	0.1495"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
10-24	0.19"	No. 5	0.2055"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
10-24	0.38"	No. 5	0.2055"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
10-32	0.285"	13/64"	13/64"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
1/4"-20	1/4"	H	0.266"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
1/4"-20	3/8"	H	0.266"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
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	00000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
3/8"-16	3/8"	X	0.397"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
3/8"-16	0.562"	X	0.397"	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
3/8"-16	3/4"	X	0.397"	1	000000000	00000	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.	Pkg. Qty.		Pkg.		Each		Each		Each		Each
Nickel Alloy
M3	0.5	3	3.2 mm	3.2 mm	1	000000000	00000	000000000	000000	000000000	000000	000000000	0000000	000000000	000000
M3	0.5	6	3.2 mm	3.2 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	4	4.25 mm	4.25 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	6	4.25 mm	4.25 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M4	0.7	8	4.25 mm	4.25 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M5	0.8	7.5	5.3 mm	5.3 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M5	0.8	10	5.3 mm	5.3 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M6	1	9	6.3 mm	6.3 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M6	1	12	6.3 mm	6.3 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	00000
M8	1.25	8	8.4 mm	8.4 mm	1	000000000	00000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	12	8.4 mm	8.4 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M8	1.25	16	8.4 mm	8.4 mm	1	000000000	00000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M10	1.5	10	10.5 mm	10.5 mm	1	000000000	00000	000000000	00000	000000000	00000	000000000	000000	000000000	000000
M10	1.5	15	10.5 mm	10.5 mm	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000	000000000	000000

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How to Install Helical Inserts

About Helical Insert Length

Nickel Alloy Helical Inserts