1 1/2"-6 Standoffs | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Thread Size Thread Size	Show

1 1/2"-6

	Thread Size Thread Size	Hide

	Length Length

3 1/2"

	Width Width

2 1/4"

2 3/8"

2 1/2"

	Threading Threading

	Fully Threaded
	Partially Threaded

	Nut Type Nut Type


Coupling	Hex

	Material Material

Brass

Stainless Steel

Steel

	Finish Finish

Black Oxide

Zinc Plated

	Hex Length Hex Length

	Thread Direction Thread Direction

	Right Hand

	Fastener Strength Grade/Class Fastener Strength Grade/Class

Grade 5

Grade 8

ASTM Grade 2H

	Thread Length Thread Length

3 3/4"

	Thread Spacing Thread Spacing

Coarse

	Thread Type Thread Type

UNC

	Drive Style Drive Style

	External Hex

	Thread Fit Thread Fit

Class 2B

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

REACH Compliant

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Coupling Nut Profile Coupling Nut Profile

Standard

Extra Long

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

DFARS Specialty Metals
COTS-Exempt

	Gender Gender

	Female

	Shape Shape

	Hex

	Hex Size Hex Size

2 3/8"

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9 Products

About Nuts, Materials, and Finishes

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

Zinc-plated steel adapters are strong and corrosion resistant.

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

Inch

Thread Size		Thread Lg.		Thread Fit		Hex				Each
(A)	(B)	(A)	(B)	(A)	(B)	Size	Lg.	Hardness		1-9	10-Up
Zinc-Plated Steel
1 1/2"-6	1 1/2"-6	3 3/4"	3 3/4"	Class 2B	Class 2B	2 3/8"	8"	Rockwell B65	000000000	000000	000000

18-8 Stainless Steel Coupling Nuts

These coupling nuts have good chemical resistance and may be mildly magnetic. Also known as extension nuts, use them to connect and extend threaded rods.

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

				Each
Thread Size	Lg.	Wd.		1-9	10-Up
18-8 Stainless Steel
1 1/2"-6	3 1/2"	2"	000000000	000000	000000

Low-Strength Steel Coupling Nuts

Also known as extension nuts, use these to connect and extend threaded rods. They're about half the strength of medium-strength steel coupling nuts for use in light duty fastening applications.

Zinc-plated steel coupling nuts resist corrosion in wet environments.

Black-oxide steel coupling nuts have a dark surface color and are mildly corrosion resistant in dry environments.

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

				Each
Thread Size	Lg.	Wd.		1-9	10-Up
Zinc-Plated Steel
1 1/2"-6	3 1/2"	2"	000000000	000000	000000
Black-Oxide Steel
1 1/2"-6	4"	2"	000000000	00000	00000

Medium-Strength Steel Coupling Nuts—Grade 5

Also known as extension nuts, use these to connect and extend threaded rods.

Zinc-plated steel coupling nuts resist corrosion in wet environments.

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

				Each
Thread Size	Lg.	Wd.		1-9	10-Up
Zinc-Plated Steel—Grade 5
1 1/2"-6	3 1/2"	2"	000000000	000000	000000

High-Strength Steel Coupling Nuts—Grade 8

Also known as extension nuts, use these to connect and extend threaded rods. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel coupling nuts. A zinc plating provides corrosion resistance in wet environments.

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

				Each
Thread Size	Lg.	Wd.		1-9	10-Up
Zinc-Plated Steel—Grade 8
1 1/2"-6	3 1/2"	2 1/4"	000000000	000000	000000

Extreme-Strength
Steel Coupling Nuts

Also known as extension nuts, use these to connect and extend threaded rods. Made from Grade 2H steel, they're about 20% stronger than high-strength steel coupling nuts and comparable in strength to Grade 9 bolts.

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

				Each
Thread Size	Lg.	Wd.		1-9	10-Up
Steel—ASTM Grade 2H
1 1/2"-6	3 1/2"	2 1/2"	000000000	000000	000000

Brass Coupling Nuts

These coupling nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Also known as extension nuts, use them to connect and extend threaded rods.

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

Inch

				Each
Thread Size	Lg.	Wd.		1-9	10-Up
Brass
1 1/2"-6	3 1/2"	2"	000000000	0000000	0000000

Steel Extra-Long Coupling Nuts

Also known as sleeve nuts, these are at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.

Zinc-plated steel nuts resist corrosion in wet environments.

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

Inch

					Each
Thread Size	Lg.	Wd.	Threading		1-9	10-Up
Zinc-Plated Steel
1 1/2"-6	8"	2 3/8"	Partially Threaded	000000000	000000	000000