3 5/8" Tubing | McMaster-Carr

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as frames, supports, and conduit. This steel is manufactured to ASTM, SAE, or EN standards for quality and performance.

DOM (drawn over mandrel) welded tubes are stronger than ERW (electric resistance welded) tubes.

Heat treatable tubes can be surface hardened. Tubes that are stress relieved minimize warping during machining.

Tubes

0.188" Wall Thick.
OD	ID	Yield Strength, psi	Fabrication	Weld Method	Heat Treatable	Heat Treatment	Hardness	Specifications Met		1/2 ft. Lg.	1 ft. Lg.	3 ft. Lg.
4"	3 5/8"	55,000	Welded	DOM (Drawn Over Mandrel)	Yes	Stress Relieved	Rockwell B75 (Medium)	ASTM A513 Type 5	0000000	000000	000000	0000000

Clear Scratch- and UV-Resistant Cast Acrylic Tubes

Color: Clear
Temperature Range: 0° to 150° F
Tensile Strength: 10,000-11,250 psi (Good)
Impact Strength: 0.3-0.4 ft.-lbs./in. (Poor)
Hardness: Rockwell M94-M100 (Hard)
For Use Outdoors: Yes
Specifications Met: See table

Fabricate containers, tanks, and lenses for light fixtures with these scratch- and UV-resistant cast acrylic tubes. Cast acrylic, which is comparable to Lucite and Plexiglas® Acrylic, is easier to machine than extruded acrylic. This material stands up to outdoor use better than polycarbonate and maintains clarity over time.

3/16" Wall Thick.
OD	OD Tolerance	ID	Lengths, ft.	Specifications Met		Per Ft.
4"	-0.045" to 0.045"	3 5/8"	1, 3, 5	ASTM D5436, FDA Compliant 21 CFR 177.1010, UL 94 HB	00000000	000000

Flexible Rubber Foam Pipe Insulation

Soft and easy to install, this insulation restricts absorption of water, air, and gas. It is often used on cold and hot water lines and refrigeration lines. Seal with contact adhesive (sold separately). To use outdoors, coat in acrylic paint.

Slit tubes have an adhesive strip closure.

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

Slit Tubes

Slit Tube

Temperature Range: -295° to 220° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

1/2" Wall Thick.
ID	For Pipe Size	For Copper Tube Size	Lg., ft.	Flexibility	R Value		Each
Buna-N/PVC Foam
3 5/8"	3	3 1/2	6	Flexible	2	00000000	000000
3/4" Wall Thick.
Buna-N/PVC Foam
3 5/8"	3	3 1/2	6	Flexible	3	00000000	00000
1" Wall Thick.
Buna-N/PVC Foam
3 5/8"	3	3 1/2	6	Flexible	4	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-fl. oz. Brush-Top Can)	00000000	Each	00000

90° Elbows

Elbow

Temperature Range: -295° to 220° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

1/2" Wall Thick.
ID	For Pipe Size	For Copper Tube Size	Flexibility	Tube Style	R Value		Each
Buna-N/PVC Foam
3 5/8"	3	3 1/2	Flexible	Unslit	2	00000000	000000
3/4" Wall Thick.
Buna-N/PVC Foam
3 5/8"	3	3 1/2	Flexible	Unslit	3	00000000	00000
1" Wall Thick.
Buna-N/PVC Foam
3 5/8"	3	3 1/2	Flexible	Unslit	4	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-fl. oz. Brush-Top Can)	00000000	Each	00000

Tees

Tee

Temperature Range: -295° to 220° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke, ASTM C534

1/2" Wall Thick.
ID	For Pipe Size	For Copper Tube Size	Flexibility	Tube Style	R Value		Each
Buna-N/PVC Foam
3 5/8"	3	3 1/2	Flexible	Unslit	2	000000000	000000
3/4" Wall Thick.
Buna-N/PVC Foam
3 5/8"	3	3 1/2	Flexible	Unslit	3	000000000	00000
1" Wall Thick.
Buna-N/PVC Foam
3 5/8"	3	3 1/2	Flexible	Unslit	4	000000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-fl. oz. Brush-Top Can)	00000000	Each	00000

Economical Flexible Polyethylene Foam Pipe Insulation

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

Slit Tubes

Slit Tube

Temperature Range: -295° to 200° F
Heat Flow Rate: 0.270 Btu @ 75° F
Density: 1.5 lbs./cu. ft.
Color: See table
Specifications Met: See table

1/2" Wall Thick.
ID	For Pipe Size	For Copper Tube Size	Lg., ft.	Flexibility	Specifications Met	R Value		Each
Black
3 5/8"	3	3 1/2	6	Flexible	ASTM E84 25/50 for Flame and Smoke	2	000000000	000000
3/4" Wall Thick.
Black
3 5/8"	3	3 1/2	6	Flexible	ASTM E84 25/50 for Flame and Smoke	3	000000000	00000

Contact Adhesive (16-fl. oz. Brush-Top Can)	00000000	Each	000000
White Acrylic Coating (1-qt. Can)	00000000	Each	00000

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About Selecting Thermal Insulation

About Plastic

Low-Carbon Steel Round Tubes

Clear Scratch- and UV-Resistant Cast Acrylic Tubes

Flexible Rubber Foam Pipe Insulation

Economical Flexible Polyethylene Foam Pipe Insulation