0.39" Tubing | McMaster-Carr

Often used in place of aluminum for structural frames, machinery components, and robotics, these tubes are lighter in weight and almost as rigid. Carbon fiber is known for its use in the aerospace industry where a balance of weight and strength is vital. Thanks to these tubes being lightweight, they reduce wear and stress on motorized parts to extend the life of machinery.

Plain matte tubes have fibers that run in one direction, making them strong in the direction of the fibers. They resist bending across the fibers but will splinter and separate like string cheese when bent along the length of the fiber. Matte carbon fiber is ready to paint and won’t reflect light, making it ideal for photography applications.

Plain Tubes

Color: Black
Max. Temperature: 180° F
Tensile Strength:
Glossy Tubes: 125,000-175,000 psi (Excellent)
Matte Tubes: 120,000-175,000 psi (Excellent)
Fiber Tensile Stiffness: Standard (33-36 msi)
Impact Strength: Not Rated
Hardness: Not Rated
For Use Outdoors: No

12" Lg.
OD	OD Tolerance	ID	ID Tolerance	Construction Layup		Each
Matte Tubes (Unidirectional Weave)
0.041" Wall Thickness
0.472"	-0.006" to 0.006"	0.39"	-0.006" to 0.006"	0°	00000000	000000
39" Lg.
Matte Tubes (Unidirectional Weave)
0.041" Wall Thickness
0.472"	-0.006" to 0.006"	0.39"	-0.006" to 0.006"	0°	0000000	00000
78" Lg.
Matte Tubes (Unidirectional Weave)
0.041" Wall Thickness
0.472"	-0.006" to 0.006"	0.39"	-0.006" to 0.006"	0°	00000000	00000

Electrical-Insulating Tube Sleeving

Add a layer of insulation to prevent electricity and heat from dissipating from wire and cable. This sleeving is often used in motors, transformers, and generators. Made of coated fiberglass, it resists abrasion, acids, alkalies, and chemicals.

Vinyl-coated sleeving resists wax and alcohol. Sleeving is flame-rated VW-1 to meet requirements for preventing the spread of flames based on a timed test with vertically suspended material.

Fiberglass Fabric with Vinyl Plastic Coating
ID	For Wire Gauge	For Wire Size	Wall Thick.	For Max. Voltage	Temperature Range, °F	Specifications Met	Color		5 ft.	25 ft.
0.39"	1/0	3/8"	0.03"	7,000V AC	0° to 265°	UL Recognized Component, CSA Certified, UL 2556 VW-1	Black	0000000	00000	000000

High-Temperature Electrical-Insulating Tube Sleeving

This sleeving is often used to insulate connections in transformers, relays, and solenoids. It prevents electricity and heat from dissipating from wire and cable. When exposed to flame, it will self-extinguish and produce a nonconductive ash. It’s flame rated VW-1 to meet requirements for preventing the spread of flames based on a timed test with vertically suspended material. Made of silicone-coated fiberglass, it resists chemicals.

Fiberglass Fabric with Silicone Rubber Coating
ID	For Wire Size	Wall Thick.	For Max. Voltage	Temperature Range, °F	Specifications Met	Choose a Color		5 ft.	25 ft.
Black and White
0.39"	3/8"	0.03"	7,000V AC	-65° to 390°	CSA Certified, UL 2556 VW-1, UL Recognized Component	Black, White	0000000	000000	000000

Expandable Electrical-Insulating Tube Sleeving

A specially formulated silicone rubber coating allows this fiberglass sleeving to stretch over items during installation; it then tightens around its contents for a secure fit. Often used in motors, generators, and transformers, it prevents electricity and heat from dissipating from wire and cable. It has good chemical resistance.

Fiberglass Fabric with Silicone Rubber Coating
ID	For Wire Size	Wall Thick.	For Max. Voltage	Temperature Range, °F	Specifications Met	Choose a Color		5 ft.	25 ft.
0.39"	3/8"	0.03"	7,000V AC	-65° to 390°	UL Recognized Component	Black, White	0000000	000000	000000

Flexible Plastic Conduit

Conduit

Make tight bends in machine and equipment wiring with this conduit. Also known as mechanical protection tubing (MPT), it withstands vibration, is flame retardant, and resists oil, solvents, and UV light. When used with fittings for flexible plastic conduit, it seals out air and liquid.

												Per Ft.
Conduit Trade Size	ID	OD	Bend Radius	Material	Color	Temperature Range, °F	Environment	Environmental Rating	Specifications Met	Lengths, ft.		1-99	100-Up
5/16	0.39"	0.51"	1"	Nylon	Black	-10° to 245°	Damp, Dusty, High-Pressure Washdown, Submersible, Washdown	IP68, IP69K	DIN 5510, DIN EN 60204, UL 1696, UL 94 HB, UL Recognized Component	10, 25, 50, 100	0000000	00000	00000

Crush-Resistant Flexible Plastic Conduit

Conduit

Thick corrugations make this conduit crush resistant. Also known as mechanical protection tubing (MPT), it withstands vibration, is flame retardant, and resists oil, solvents, and UV light. When used with fittings for flexible plastic conduit, this conduit seals out air and liquid.

											Per Ft.
Conduit Trade Size	ID	OD	Bend Radius	Material	Color	Temperature Range, °F	Environmental Rating	Specifications Met	Lengths, ft.		1-99	100-Up
5/16	0.39"	0.51"	1"	Nylon	Black	-40° to 245°	IP68, IP69K	UL Recognized Component, UL 94 V-0	10, 25, 50, 100	0000000	00000	00000

Liquid-Tight Flexible Plastic Conduit

Conduit

The spiral design makes this conduit flexible. When used with liquid-tight fittings, it seals out liquid and resists oil, corrosion, and UV light. Route it around tight bends and use in high-vibration applications or those that require periodic flexing. This conduit cuts cleanly with no jagged edges and has a smooth interior that protects wire and cable from abrasion when being pulled.

												Per Ft.
Conduit Trade Size	ID	OD	Bend Radius	Flexibility	Material	Color	Temperature Range, °F	Environment	Specifications Met	Lengths, ft.		1-99	100-Up
1/4	0.39"	0.57"	1"	Ultra Flexible	PVC	Black	0° to 155°	Washdown	UL Recognized Component	5, 10, 25, 50, 100	000000	00000	00000

Straight Adapters

Push-In × Threaded

Use these adapters to attach liquid-tight flexible plastic conduit to a knockout in an outlet box or enclosure. They provide a connection that seals out liquid and resists oil, corrosion, and UV light. They are UL listed when used with abrasion-resistant liquid-tight flexible plastic conduit (Type B).

Adapters with a push-in end are removable and reusable.

Conduit Connection		Electrical Box Connection
Conduit Trade Size	Gender	Thread Size	Thread Type	Gender	Material	Includes	Color		Each
Push-In Conduit Connection × Threaded Electrical Box Connection
1/4	Female	PG-7	PG	Male	Nylon	Steel Locknut	Black	00000000	00000

Shielded Flexible Plastic Conduit

Conduit

Covered with a copper braid, this conduit protects wire and cable from electromagnetic interference (EMI) caused by motors and other equipment. Use with fittings for shielded flexible plastic conduit. This conduit is also known as mechanical protection tubing (MPT).

													Per Ft.
Conduit Trade Size	ID	OD	Bend Radius	Material	Cover Material	Color	Temperature Range, °F	Environment	Environmental Rating	Specifications Met	Lengths, ft.		1-99	100-Up
5/16	0.39"	0.55"	2"	Nylon	Copper Braid	Gray	-40° to 220°	Submersible	IP68, IP69K	UL 94 HB	5, 10, 25, 50, 100	0000000	00000	00000

Fittings

These adapters provide electromagnetic interference (EMI) protection when connecting shielded flexible plastic conduit to a knockout in an outlet box or enclosure. Twist the compression end over the conduit; tighten the compression ring to secure.

A brass locknut is required (not included) when installing in an unthreaded knockout.

Straight Adapters
Conduit Connection			Electrical Box Connection								Locknuts
Conduit Trade Size	Conduit Connection Type	Gender	Thread Size	Thread Type	Gender	Material	Environment	Environmental Rating		Each		Each
5/16	Compression	Female	M12	Metric	Male	Nickel-Plated Brass	Washdown	IP66	0000000	000000	0000000	00000

Round Adjustable-Length Shipping Tubes

Adjust these tubes by twisting the two halves. A hexagonal end prevents rolling. Use them to protect long, thin objects during shipping.

Twist-to-lock tubes can be slid up or down to adjust their length, so you don’t have to repeatedly twist the two pieces. To slide, turn the top tube into the sliding channel. To lock, turn the tube with the ridges into the grooved channel.

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

Tubes

					Each
ID	Inside Lg.	Thick.	Material		1-49	50-Up
Clear
0.39"	2"-3"	0.04"	PVC Plastic	0000000	00000	00000

Twist-to-Lock Tubes

Clear
ID	Inside Lg.	Thick.	Material	Pkg. Qty.		Pkg.
0.39"	2"-3"	0.04"	Polypropylene Plastic	10	00000000	00000
0.39"	3"-5"	0.04"	Polypropylene Plastic	10	00000000	0000
0.39"	5"-8"	0.04"	Polypropylene Plastic	10	00000000	00000

Recycled Plastic Round Adjustable-Length Shipping Tubes

Made of recycled polyethylene, these shipping tubes are more sustainable than standard plastic shipping tubes. Push the ends together or pull them apart to adjust the length. Use these tubes to protect long, thin objects during shipping.

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

						Pkg.
ID	Inside Lg.	Thick.	Material	Pkg. Qty.		1-9	10-Up
Opaque White
0.39"	2"-3"	0.04"	Recycled Polyethylene Plastic	10	0000000	00000	00000