1.66" Tubing | McMaster-Carr

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About Durometer Hardness Scales

About Aluminum

About Conduit

Yield Strength: 16,000 psi
Hardness: Brinell 55 (Soft)
Temper: T5
Fabrication: Extruded
Specifications Met: ASTM B221

More corrosion resistant and easier to form than multipurpose 6061 aluminum, 6063 is primarily used for exterior railings, decorative trim, and door frames.

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

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

0.14" Wall Thick. (-0.014" to 0.014" Tolerance)
OD	OD Tolerance	ID	ID Tolerance	Heat Treatment	Temperature Range, °F	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	4 ft. Lg.	8 ft. Lg.
1.66"	-0.025" to 0.025"	1.380"	-0.025" to 0.025"	Hardened	-320° to 212°	0.010" per ft.	00000000	000000	000000	000000	000000	0000000

Easy-to-Form Marine-Grade 5086 Aluminum Tubes

Yield Strength: 28,000 psi
Hardness: Not Rated
Temper: H32 (1/4 Hard)
Fabrication: Cold Worked
Specifications Met: ASTM B210

5086 aluminum is used on ships, oil rigs, tanks, and pressure vessels because of its excellent saltwater resistance and formability.

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

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Wall Thick.	Wall Thick. Tolerance	OD	OD Tolerance	ID	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
0.140"	-0.018" to 0.018"	1.660"	-0.008" to 0.008"	1.380"	0.010" per ft.	0000000	000000	0000000	0000000
0.191"	-0.024" to 0.024"	1.660"	-0.008" to 0.008"	1.278"	0.010" per ft.	0000000	000000	000000	000000

Thick-Wall (Rigid) Steel Conduit

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

Conduit

This impact- and crush-resistant conduit is also known as galvanized rigid conduit (GRC). It has one threaded male end; the other end has a threaded female connector.

5-ft. lengths can be shipped via small-parcel carrier.

5 ft. Lg.
Conduit Trade Size	ID	OD	Pipe Size	Thread Type	Specifications Met	Material	Pipe Size - 2		Each
1 1/4	1.39"	1.66"	1 1/4	NPT	UL Listed	Galvanized Steel	1 1/4	0000000	0000000
10 ft. Lg.
1 1/4	1.39"	1.66"	1 1/4	NPT	UL Listed	Galvanized Steel	1 1/4	0000000	00000

Straight Adapters—Threaded Conduit Connection × Threaded Electrical Box Connection

Attach medium-wall (IMC) and thick-wall (rigid) steel conduit to a knockout in an outlet box or enclosure.

NPT female × NPSM male straight adapters are also known as hubs. They have an insulated throat to protect wire and cable from abrasion when being pulled. Use in wet or dry locations.

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Material	Includes		Each
1 1/4	1 1/4	NPT	Female	1 1/4	NPSM	Male	Zinc	Locknut	0000000	000000

Straight Adapters—Threaded Conduit Connection × Flanged End Electrical Box Connection

Attach medium-wall (IMC) and thick-wall (rigid) steel conduit to a knockout in an outlet box or enclosure.

NPSM male × flanged end male straight adapters are also known as conduit nipples, chase nipples, and box adapters. The flange installs through a knockout from inside an outlet box or enclosure. Use with a locknut (not included) to create a short raceway between boxes or enclosures.

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	For Knockout Trade Size	Gender	Lg.	Material		Each
1 1/4	1 1/4	NPSM	Male	1 1/4	Male	7/8"	Zinc	0000000	00000

Straight Adapters—Compression Conduit Connection × Threaded Electrical Box Connection

Attach medium-wall (IMC) and thick-wall (rigid) steel conduit to a knockout in an outlet box or enclosure.

Compression female × NPSM male straight adapters offer a reliable hold on conduit.

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Material	Includes		Each
1 1/4	Female	1 1/4	NPSM	Male	Zinc-Plated Steel	Locknut	0000000	000000

90° Elbow Adapters—Threaded Conduit Connection × Threaded Electrical Box Connection

Attach medium-wall (IMC) and thick-wall (rigid) steel conduit to a knockout in an outlet box or enclosure.

NPSM female × NPSM male 90° elbow adapters are for tight spaces where conduit can't be bent.

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Material		Each
1 1/4	1 1/4	NPSM	Female	1 1/4	NPSM	Male	Iron	0000000	000000

Straight Connectors—Compression Conduit Connection

Join pieces of medium-wall (IMC) and thick-wall (rigid) conduit.

Compression female straight connectors join two pieces of unthreaded conduit. Push the conduit into the ends; tighten the compression rings to secure.

Conduit Connection
Conduit Trade Size	Gender	Material		Each
1 1/4	Female	Zinc-Plated Steel	0000000	000000

Straight Connectors—Screw-Clamp Conduit Connection

Join pieces of medium-wall (IMC) and thick-wall (rigid) conduit.

Screw-clamp ends tighten around conduit with screws.

Conduit Connection
Conduit Trade Size	Gender	Material	Specifications Met		Each
Connector
1 1/4	Female	Zinc-Plated Steel	UL Listed	00000000	000000

Straight Connectors—Threaded Conduit Connection

Connector

Connector with Glide Insert

Join pieces of medium-wall (IMC) and thick-wall (rigid) conduit.

NPT female straight connectors with glide insert have three pieces. The two outer pieces turn independently so you don't need to rotate the conduit.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Material		Each
Connector
1 1/4	1 1/4	NPSM	Female	Galvanized Steel	0000000	00000
Connector with Glide Insert
1 1/4	1 1/4	NPT	Female	Zinc-Plated Iron	0000000	00000

90° Elbow Connectors—Threaded Conduit Connection

With NPT Threads

With NPSM Threads and Removable Cover

Join pieces of medium-wall (IMC) and thick-wall (rigid) conduit.

NPSM female 90° elbow connectors with removable cover allow for quick access to pull wire and cable.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Lg.	Material	Features		Each
1 1/4	1 1/4	NPT	Male	11"	Galvanized Steel	__	0000000	000000
1 1/4	1 1/4	NPSM	Female	__	Zinc	Removable Cover	0000000	00000

Offset Elbow Connectors—Threaded Conduit or Electrical Box Connection

Join pieces of medium-wall (IMC) and thick-wall (rigid) conduit.

Offset elbow connectors join knockouts on outlet boxes or enclosures that do not align.

Conduit or Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Offset Lg.	Material		Each
1 1/4	1 1/4	NPSM	Male	3/4"	Zinc	0000000	00000

Grommets

Connect to the end of conduit or a fitting to protect wire and cable from abrasion when being pulled. Use with medium-wall (IMC) and thick-wall (rigid) steel conduit.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Material	Color		Each
1 1/4	1 1/4	NPSM	Female	Polypropylene	Gray	00000000	00000

Bushings

Join two different sizes of threaded conduit. Use with medium-wall (IMC) and thick-wall (rigid) steel conduit.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Material		Each
1 1/4 × 1/2	1 1/4 × 1/2	NPSM	Male × Female	Zinc-Plated Steel	0000000	00000
1 1/4 × 3/4	1 1/4 × 3/4	NPSM	Male × Female	Zinc-Plated Steel	0000000	0000
1 1/4 × 1	1 1/4 × 1	NPSM	Male × Female	Zinc-Plated Steel	0000000	0000
2 × 1 1/4	2 × 1 1/4	NPSM	Male × Female	Zinc-Plated Steel	0000000	00000

Grounding Clamps

Grounding Clamp With Hinge

Ground conduit by running a ground wire through the attached lug. The included grommet protects wire and cable from abrasion when being pulled. Use with medium-wall (IMC) and thick-wall (rigid) steel conduit.

Grounding clamps with hinge open for quick installation around conduit and secure with a screw.

Grounding Clamp with Hinge
Conduit Trade Size	Gender	Material	Compatible With		Each
1 1/4	Female	Zinc	Aluminum Wire, Copper Wire	00000000	000000

Reducing Washers

Reduce the knockout size in an outlet box or enclosure so you can attach a different size of medium-wall (IMC) and thick-wall (rigid) steel conduit to it. Two reducing washers are required per knockout.

Conduit Trade Size	Material	Pkg. Qty.		Pkg.
1 1/4 × 1/2	Steel	10	00000000	00000
1 1/4 × 3/4	Steel	10	00000000	0000
1 1/4 × 1	Steel	10	00000000	0000
2 × 1 1/4	Steel	10	00000000	00000

Raintight Reducing Washers

Seal out moisture while reducing a knockout size in an outlet box or enclosure. Each includes a washer and a rubber-coated steel gasket.

Conduit Trade Size	Material		Each
1 1/4 × 1/2	Steel	00000000	000000
1 1/4 × 3/4	Steel	00000000	00000
1 1/4 × 1	Steel	00000000	00000

Rigid PVC Conduit

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

Conduit

Also known as PVC Schedule 40 conduit, this conduit is corrosion resistant and UV light resistant for outdoor use. It is lightweight with strong walls to provide protection from damage. It can be buried or encased in concrete.

The female end is expanded so another piece of conduit can be pushed in to connect without a fitting. PVC cement is required (not included) when joining conduit and push-in ends on fittings and access ports.

8-ft. lengths can be shipped via small-parcel carrier.

			8 ft. Lg.		10 ft. Lg.
ID	OD	Environment		Each		Each
1.335"	1.66"	Outdoor, Underground	000000	00	000000	000000
1.38"	1.66"	Outdoor, Underground	0000000	000000	000000	00

Straight Adapters

Threaded Male

Flanged End

Attach PVC Schedule 40 or Schedule 80 conduit to a knockout in an outlet box or enclosure. These adapters are lightweight, corrosion resistant, and UV light resistant for outdoor use. They can be buried or encased in concrete. PVC cement is required (not included) to secure push-in connections.

Adapters with NPT threads connect unthreaded conduit to threaded fittings and knockouts. Push-in male × flanged end male adapters, also known as box adapters, install through a knockout from inside an electrical enclosure.

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	For Knockout Trade Size	Gender		Each
Push-In Conduit Connection × Threaded Electrical Box Connection
1 1/4	Female	1 1/4	NPT	__	Male	0000000	00000
Push-In Conduit Connection × Flanged End Electrical Box Connection
1 1/4	Male	__	__	1 1/4	Male	0000000	0000

Push-In Straight Connectors

Join pieces of PVC Schedule 40 or Schedule 80 conduit. These connectors are lightweight, corrosion resistant, and UV light resistant for outdoor use. They can be buried or encased in concrete. They have push-in ends that slide over conduit. PVC cement is required (not included) to secure the connection.

Conduit Connection
Conduit Trade Size	Gender		Each
Push-In Conduit Connection
1 1/4	Female	0000000	00000

Push-In × Threaded Straight Connectors

Push-In Conduit Connection		Threaded Conduit Connection
Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Material	Color	Specifications Met		Each
Push-In Conduit Connection × Threaded Conduit Connection
1 1/4	Female	1 1/4	NPT	Female	PVC	Gray	UL Listed	0000000	00000

90° Elbow Connectors

Join pieces of PVC Schedule 40 or Schedule 80 conduit. These connectors are lightweight, corrosion resistant, and UV light resistant for outdoor use. They can be buried or encased in concrete. PVC cement is required (not included) to secure the connection.

Conduit Connection
Conduit Trade Size	Gender	Lg.		Each
Push-In Conduit Connection
1 1/4	Male	9 1/4"	0000000	00000

Reducing Adapters

Connect two different sizes and genders of PVC Schedule 40 or Schedule 80 conduit. These reducing adapters are lightweight, corrosion resistant, and UV light resistant for outdoor use. They can be buried or encased in concrete. PVC cement is required (not included) to secure the connection.

Conduit Connection
Conduit Trade Size	Gender		Each
Push-In Conduit Connection
1 1/4 × 3/4	Male × Female	0000000	00000
1 1/4 × 1	Male × Female	0000000	0000
1 1/2 × 1 1/4	Male × Female	0000000	0000
2 × 1 1/4	Male × Female	0000000	00000

Straight (C) Access Ports

Also known as conduit bodies, these ports provide access to wire and cable inside PVC Schedule 40 or Schedule 80 conduit for pulling, splicing, and maintenance. They are also used to change the direction of a run. These ports are lightweight, corrosion resistant, and UV light resistant for outdoor use. They can be buried or encased in concrete. PVC cement is required (not included) to secure the connection.

Conduit Connection
Conduit Trade Size	Gender		Each
Push-In Conduit Connection
1 1/4	Female	0000000	000000

Tee (T) Access Ports

Conduit Connection
Conduit Trade Size	Gender		Each
Push-In Conduit Connection
1 1/4	Female	0000000	000000

90° Elbow (LB) Access Ports

Conduit Connection
Conduit Trade Size	Gender		Each
Push-In Conduit Connection
1 1/4	Female	0000000	000000

Straight, Tee, or 90° Elbow (C, T, LB, LL, LR) Access Ports

Conduit Connection
Conduit Trade Size	Gender		Each
Push-In Conduit Connection
1 1/4	Female	0000000	000000

Rigid Aluminum Conduit

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

Conduit

This nonmagnetic aluminum conduit withstands damp and corrosive environments. It is lightweight, but its walls are strong enough to resist damage while remaining easy to bend and cut. Bend with a conduit bender (not included) and cut with a hacksaw. This conduit has one threaded male end; the other end has a threaded female connector.

5-ft. lengths can be shipped via small-parcel carrier.

						5 ft. Lg.		10 ft. Lg.
Conduit Trade Size	ID	OD	Pipe Size	Thread Type	Specifications Met		Each		Each
1 1/4	1.39"	1.66"	1 1/4	NPT	UL Listed	0000000	000000	0000000	000000

Straight Adapters

Attach rigid aluminum conduit to a knockout in an outlet box or enclosure with these adapters, also known as hubs. Made of nonmagnetic aluminum, they withstand damp and corrosive environments.

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender		Each
1 1/4	1 1/4	NPT	Female	1 1/4	NPSM	Male	0000000	000000

Straight Connectors

Join pieces of rigid aluminum conduit. Made of nonmagnetic aluminum, these connectors withstand damp and corrosive environments.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender		Each
1 1/4	1 1/4	NPSM	Female	0000000	00000

90° Elbow Connectors

Join pieces of rigid aluminum conduit. Made of nonmagnetic aluminum, these connectors withstand damp and corrosive environments.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Lg.		Each
1 1/4	1 1/4	NPT	Male	10 3/4"	0000000	000000

Bushings

Join two different sizes of rigid aluminum conduit. Made of nonmagnetic aluminum, these bushings withstand damp and corrosive environments.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender		Each
1 1/4 × 1/2	1 1/4 × 1/2	NPT	Male × Female	0000000	00000
1 1/4 × 3/4	1 1/4 × 3/4	NPT	Male × Female	0000000	0000
1 1/4 × 1	1 1/4 × 1	NPT	Male × Female	0000000	0000
2 × 1 1/4	2 × 1 1/4	NPT	Male × Female	0000000	00000

Rigid Stainless Steel Conduit

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

Conduit

Use in food-processing and chemical plants—this is the most corrosion resistant thick-wall (rigid) conduit we offer. It is also crush and impact resistant. This conduit has one threaded male end; the other end has a threaded female connector.

5-ft. lengths can be shipped via small-parcel carrier.

5 ft. Lg.
Conduit Trade Size	ID	OD	Pipe Size	Thread Type	Material	Specifications Met		Each
1 1/4	1.38"	1.66"	1 1/4	NPT	304 Stainless Steel	UL Listed, C-UL Listed	0000000	0000000
10 ft. Lg.
1 1/4	1.38"	1.66"	1 1/4	NPT	304 Stainless Steel	UL Listed, C-UL Listed	0000000	000000

Straight Adapters

Threaded Conduit Connection

Also known as hubs, these adapters attach rigid stainless steel conduit to a knockout in an outlet box or enclosure. They are corrosion resistant, so you can use them in food-processing and chemical plants.

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Material	Specifications Met		Each
Threaded Conduit Connection
1 1/4	1 1/4	NPT	Female	1 1/4	NPSM	Male	316 Stainless Steel	UL Listed, C-UL Listed	0000000	0000000

Straight Connectors

Threaded Conduit Connection

Join pieces of rigid stainless steel conduit. These connectors are corrosion resistant, so you can use them in food-processing and chemical plants.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Material	Specifications Met		Each
Threaded Conduit Connection
1 1/4	1 1/4	NPSM	Female	316 Stainless Steel	UL Listed, C-UL Listed	0000000	0000000

Elbow Connectors

90° Elbow

Join pieces of rigid stainless steel conduit. These connectors are corrosion resistant, so you can use them in food-processing and chemical plants.

Conduit Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Lg.	Material	Specifications Met		Each
90° Elbow
1 1/4	1 1/4	NPT	Male	11 5/8"	316 Stainless Steel	UL Listed, C-UL Listed	0000000	0000000

Push-In Pipe and Tubing Grommets

Press these flexible grommets into holes and their tapered inner wall will expand when pipe or tubing is inserted to hold them snugly in place. They're often used for routing applications on metal, plastic, and fiberglass tanks. Made of plastic, these grommets are chemical resistant and won't dry out and become brittle when exposed to UV rays. All have a hard rating to withstand high levels of impact. They can be used outdoors.

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

Vinyl Rubber
For Hole Dia. (A)	For OD	For Pipe Size	For Material Thick. (B)	ID (C)	Flange Dia. (D)	Overall Ht. (E)	Hardness Rating	Hardness	Temp. Range, °F	For Use Outdoors	Color		Each
2"	1.66"	1 1/4	3/8"	1.385"	2.83"	0.74"	Hard	Durometer 75A	-20° to 160°	Yes	Black	0000000	00000
3"	1.66"	1 1/4	1/2"	1.361"	3.95"	0.78"	Hard	Durometer 75A	-20° to 160°	Yes	Black	0000000	0000

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About Durometer Hardness Scales

About Aluminum

About Conduit

Architectural 6063 Aluminum Round Tubes

Easy-to-Form Marine-Grade 5086 Aluminum Tubes

Thick-Wall (Rigid) Steel Conduit

Rigid PVC Conduit

Rigid Aluminum Conduit

Rigid Stainless Steel Conduit

Push-In Pipe and Tubing Grommets