4-40 Rivnuts | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

4-40

	Thread Size Thread Size	Hide

	For Rivet Nut Material For Rivet Nut Material

Steel

Aluminum

Stainless Steel

	Length Length

0.355"

5 7/8"

	For Rivet Nut Body Type For Rivet Nut Body Type

	Material Material

Steel

Stainless Steel

Aluminum

	Nut Type Nut Type

	Rivet

	Body Diameter Body Diameter

0.187"

0.19"

	Body Type Body Type

	Sleeve

	For Maximum Material Thickness For Maximum Material Thickness

Less than 0.125"

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Installed Length Installed Length

Less than 0.25"

	For Minimum Material Thickness For Minimum Material Thickness

0.02" to 0.099"

	For Use In For Use In

Metal

	Finish Finish

Cadmium Plated

Tin Plated

Tin-Zinc Plated

	End Type End Type

Open

	Drill Bit Decimal Size Equivalent Drill Bit Decimal Size Equivalent

0.1875"

	Drill Bit Size Drill Bit Size

3/16"

	Thread Type Thread Type

UNC

	Flange Thickness Flange Thickness

0.015"

	Flange Diameter Flange Diameter

0.211"

	Thread Fit Thread Fit

Class 2B

	Thread Spacing Thread Spacing

Coarse

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27 Products

About Nuts, Materials, and Finishes

These steel low-profile rivet nuts are about twice as strong as aluminum rivet nuts. They have a low profile for light duty fastening in low-clearance applications. A cadmium or tin-zinc plating provides corrosion resistance and adds lubricity so they collapse smoothly. The threaded portion is drawn into the sleeve when installed, creating pressure against the hole to secure the nut. Drill bit size listed in the table is for material with a 0.030"-0.090" thickness. These rivet nuts may be installed in thicker material, but may require larger holes. Install them using a hand- or power-driven rivet nut tool. Length is measured from under the flange. Installed length is the maximum length of the barrel when installed.

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

Inch

Rivet Nuts
			Body				Flange					Hand-Driven Tools		Mandrels
Thread Size	Drill Bit Size	For Material Thick.	Type	Dia.	Lg.	Installed Lg.	Dia.	Thick.	Pkg. Qty.		Pkg.		Each		Each
Cadmium-Plated Steel
4-40	3/16"	0.03" to 0.09"	Sleeve	0.187"	0.355"	0.175"	0.211"	0.015"	25	000000000	000000	000000000	000000	000000000	000000

Stainless Steel Low-Profile Rivet Nuts

The most corrosion resistant low-profile rivet nuts we offer, these stand up to chemicals. They're often used for light duty fastening in low-clearance applications. The threaded portion is drawn into the sleeve when installed, creating pressure against the hole to secure the nut. The tin-plating provides lubricity allowing the nut to collapse smoothly. Drill bit size listed in the table is for material with a 0.030"-0.090" thickness. These rivet nuts can be installed in thicker material, but may require larger holes. Install them using a hand- or power-driven rivet nut tool. Length is measured from under the flange. Installed length is the maximum length of the barrel when installed.

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

Inch

Rivet Nuts
			Body				Flange					Hand-Driven Tools		Mandrels
Thread Size	Drill Bit Size	For Material Thick.	Type	Dia.	Lg.	Installed Lg.	Dia.	Thick.	Pkg. Qty.		Pkg.		Each		Each
Tin-Plated 18-8 Stainless Steel
4-40	3/16"	0.030" to 0.090"	Sleeve	0.19"	0.355"	0.175"	0.211"	0.015"	1	000000000	00000	000000000	000000	000000000	000000

Aluminum Low-Profile Rivet Nuts

These low-profile rivet nuts are one-third the weight of steel rivet nuts. They have a low profile for light duty fastening in low-clearance applications. A cadmium or tin-zinc plating provides corrosion resistance and adds lubricity so they collapse smoothly. The threaded portion is drawn into the sleeve when installed, creating pressure against the hole to secure the nut. Drill bit size listed in the table is for material with a 0.030"-0.090" thickness. These rivet nuts may be installed in thicker material, but may require larger holes. Install them using a hand- or power-driven rivet nut tool. Length is measured from under the flange. Installed length is the maximum length of the barrel when installed.

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

Inch

Rivet Nuts
			Body				Flange					Hand-Driven Tools		Mandrels
Thread Size	Drill Bit Size	For Material Thick.	Type	Dia.	Lg.	Installed Lg.	Dia.	Thick.	Pkg. Qty.		Pkg.		Each		Each
Tin-Zinc Plated Aluminum
4-40	3/16"	0.03" to 0.09"	Sleeve	0.187"	0.355"	0.145"	0.211"	0.015"	10	000000000	000000	000000000	000000	000000000	000000

Low-Profile Rivet Nut Assortments

Use these rivet nuts for light duty fastening in low-clearance applications. Assortments include rivet nuts, mandrels, and an installation tool. Rivet nuts have a cadmium plating that provides corrosion resistance and adds lubricity so they collapse smoothly. The threaded portion is drawn into the sleeve when installed, creating pressure against the hole to secure the nut.

Inch
Number of Pieces	Material	Rivet Nuts Included	For Material Thick.	Includes	Container Type		Each
282	Cadmium Plated Steel	4-40 (50 Pieces) 6-32 (50 Pieces) 8-32 (50 Pieces) 10-32 (50 Pieces) 1/4"-20 (50 Pieces) 5/16"-18 (25 Pieces)	0.03"-0.09"	Six Mandrels Installation Tool	Plastic Case	000000000	0000000

Wrench-Driven Rivet Nut Tools

Use these tools to install most styles of rivet nuts. A wrench and ratchet are required to hold the tool and tighten the nut.

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

For Thread Size	For Wrench Size	For Ratchet Size	For Rivet Nut Body Type	For Rivet Nut Material		Each
4-40	7/8"	11/16"	Smooth, Ribbed, Hex, Bulbed, Sleeve	Aluminum, Steel	000000000	000000

Hand-Driven Tools for Low-Profile Rivet Nuts

Turn these tools by hand to install low-profile rivet nuts. The required mandrels are sold separately. To use, thread the nut onto a mandrel of the same size, then place it into a hole, push down on the tool's T-handle, and turn clockwise.

Tools

For Thread Size	For Rivet Nut Body Type	For Rivet Nut Material	Overall Lg.		Each
4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, M3, M4, M5, M6, M8, M10	Sleeve	18-8 Stainless Steel, Aluminum, Steel	5 7/8"	000000000	000000

Required Mandrels

For Thread Size		Each
4-40	000000000	000000
6-32	000000000	00000
8-32	000000000	00000
10-24	000000000	00000
10-32	000000000	00000
12-24	000000000	00000
1/4"-20	000000000	00000
1/4"-28	000000000	00000
5/16"-18	000000000	00000
5/16"-24	000000000	00000
3/8"-16	000000000	00000
3/8"-24	000000000	00000
M3 × 0.5 mm	000000000	00000
M4 × 0.7 mm	000000000	00000
M5 × 0.8 mm	000000000	00000
M6 × 1 mm	000000000	00000
M8 × 1.25 mm	000000000	00000
M10 × 1.5 mm	000000000	00000

Air-Powered Rivet Nut Tools

Smaller and lighter than cordless and hydraulic rivet nut tools, use these to install smooth rivet nuts. To use, thread the nut onto the included mandrel and press the trigger to spin the nut onto the tool. Place the nut into the material and press the trigger to install the nut. Press the trigger one more time to spin the mandrel off.

Tools

						Air Connection
For Thread Size	For Rivet Nut Body Type	For Rivet Nut Material	Head Lg.	Overall Ht.	Operating Pressure, psi	Pipe Size	Thread Type	Weight, lbs.	Includes		Each
4-40	Smooth	Aluminum, Steel	6"	6"	35 to 45	1/4	NPT	4	Mandrel, Nosepiece	000000000	0000000

Additional Mandrels

For Thread Size		Each
4-40	000000000	00000

Additional Nosepiece Assemblies

For Thread Size	Includes		Each
4-40	Bearing Set, Hex Drive, Mandrel, Nose Cone	000000000	0000000