3/4 Hard Copper | McMaster-Carr

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DFARS Specialty Metals

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Conductivity Percentage

28% IACS

Free Of

Lead

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Plus

Thermal Conductivity @ Temperature

70 BTU/(hr⋅ft⋅°F) @ 68° F

Elongation

27%

Melting Point Temperature

1,680° F

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64 Products

About Copper, Brass & Bronze

Compare over 30 copper, brass, and bronze alloys to find the right material for you—all with material certificates for traceability.

Telescoping Ultra-Formable 260 Brass Round Tubes

Tubes

Sold Separately

Slide these tubes into the next larger size to create custom shafts, supports, and tubing. Made of 260 brass—the most formable we offer—they’re soft enough to shape at room temperature to modify their fit. 260 brass is also known as cartridge brass.

					1 ft. Long			3 ft. Long			300 mm Long
	OD	ID	Temper Designation	Specs. Met	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
0.014" Thick Wall (-0.001" to 0.001" Tolerance)



		1/16"	0.035"	H02/H03	ASTM B135	3	00000000	00000	5	00000000	000000	—	———	0


		3/32"	0.066"	H02/H03	ASTM B135	3	0000000	0000	5	00000000	00000	—	———	0
		1/8"	0.097"	H02/H03	ASTM B135	1	0000000	0000	5	00000000	00000	—	———	0
		5/32"	0.128"	H02/H03	ASTM B135	1	0000000	0000	5	00000000	00000	—	———	0
		3/16"	0.16"	H02/H03	ASTM B135	1	0000000	0000	6	00000000	00000	—	———	0
		7/32"	0.191"	H02/H03	ASTM B135	1	0000000	0000	6	00000000	00000	—	———	0
		1/4"	0.222"	H02/H03	ASTM B135	1	0000000	0000	5	00000000	00000	—	———	0
		9/32"	0.253"	H02/H03	ASTM B135	1	0000000	0000	5	00000000	00000	—	———	0
		5/16"	0.285"	H02/H03	ASTM B135	1	0000000	0000	4	00000000	00000	—	———	0
		11/32"	0.316"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	0000	—	———	0
		3/8"	0.347"	H02/H03	ASTM B135	1	0000000	0000	3	00000000	00000	—	———	0


		13/32"	0.378"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	0000	—	———	0
		7/16"	0.41"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		15/32"	0.441"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		1/2"	0.472"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		17/32"	0.503"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		9/16"	0.535"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		19/32"	0.566"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		5/8"	0.597"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0
		21/32"	0.628"	H02/H03	ASTM B135	1	0000000	0000	1	00000000	00000	—	———	0


		0.45 mm Thick Wall (-0.025 mm to 0.025 mm Tolerance)



				2 mm	1.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	4	00000000	00000


				3 mm	2.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	4	00000000	0000
				4 mm	3.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	3	00000000	0000
				5 mm	4.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	3	00000000	0000
				6 mm	5.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	2	00000000	0000
				7 mm	6.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	2	00000000	0000
				8 mm	7.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	2	00000000	0000
				9 mm	8.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	1	00000000	0000
				10 mm	9.1 mm	H02/H03	ASTM B135	—	———	0	—	———	0	1	00000000	0000

Telescoping Ultra-Formable 260 Brass Rectangular Tubes

Tubes Sold Separately

	Outside		Inside
	Ht.	Wd.	Ht.	Wd.	Temper Designation	Specs. Met	Pkg. Qty.		Pkg.
0.014" Thick Wall



		1/16"	1/16"	0.035"	0.035"	H02/H03	ASTM B135	2	00000000	00000


		3/32"	3/32"	0.066"	0.066"	H02/H03	ASTM B135	2	00000000	0000
		3/32"	3/16"	0.066"	0.16"	H02/H03	ASTM B135	1	00000000	0000
		1/8"	1/8"	0.097"	0.097"	H02/H03	ASTM B135	1	0000000	0000
		1/8"	1/4"	0.097"	0.222"	H02/H03	ASTM B135	1	00000000	0000
		5/32"	5/32"	0.128"	0.128"	H02/H03	ASTM B135	1	0000000	0000
		5/32"	5/16"	0.128"	0.285"	H02/H03	ASTM B135	1	00000000	0000
		3/16"	3/16"	0.16"	0.16"	H02/H03	ASTM B135	1	0000000	0000
		3/16"	3/8"	0.16"	0.347"	H02/H03	ASTM B135	1	00000000	0000
		7/32"	7/32"	0.191"	0.191"	H02/H03	ASTM B135	1	0000000	0000
		1/4"	1/4"	0.222"	0.222"	H02/H03	ASTM B135	1	0000000	0000

Ultra-Formable 260 Brass Hex Tubes

The most formable brass alloy we offer. With its high copper content and little to no lead, 260 is so soft you can bend it at room temperature. It's often shaped into ammunition casings, radiator components, and decorative door hardware. Also known as cartridge brass.

					1 ft. Long
	Outside Wd.	Inside Wd.	Temper Designation	Specs. Met		Each
0.014" Thick Wall (-0.001" to 0.001" Tolerance)



		3/32"	0.066"	H02/H03	ASTM B135	00000000	00000


		1/8"	0.097"	H02/H03	ASTM B135	00000000	0000
		5/32"	0.128"	H02/H03	ASTM B135	00000000	0000
		3/16"	0.16"	H02/H03	ASTM B135	00000000	0000