0.04" Wire | McMaster-Carr

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

REACH Compliant

	Fabrication Fabrication

Cold Drawn

Cold Worked

Heat Treated

Hot Rolled

	Temper Temper

Spring

Not Rated

	Minimum Temperature Minimum Temperature

Not Rated

	Heat Treatable Heat Treatable

Yes

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47 Products

About Copper, Brass, and Bronze

About Stainless Steel

About Aluminum

View a wire gauge conversion chart.

About Tool Steel

Spring-Back Multipurpose 304 Stainless Steel Wire

This wire bounces back after bending. Often used to construct springs and wire rope, 304 stainless steel is a good all-around choice for a wide range of applications.

PTFE-coated wire has a slippery surface, so it’s especially useful as a fish wire when navigating through confined spaces.

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

Coils

Coil

Heat Treatment: Hardened
Tensile Strength: 205,000 psi
Specifications Met: ASTM A313, ASTM A555

				1/4 lb. Coil			1 lb. Coil
Dia.	Dia. Tolerance	Fabrication	Max. Temperature, °F	Lg., ft.		Each	Lg., ft.		Each
Mirror-Like
0.04"	-0.001" to 0.001"	Cold Drawn	570°	58	00000000	000000	230	00000000	000000

1-ft. Lengths

1-ft. Length

Heat Treatment: Hardened
Tensile Strength: 205,000 psi
Specifications Met: ASTM A313, ASTM A555

					1 ft. Lg.
Dia.	Dia. Tolerance	Fabrication	Max. Temperature, °F	Pkg. Qty.		Pkg.
Mirror-Like
0.04"	-0.001" to 0.001"	Cold Drawn	570°	25	00000000	00000

PTFE-Coated Wire

PTFE-Coated Wire (68" Length)

Heat Treatment: Hardened
Tensile Strength: Not Rated
Specifications Met: ASTM A313

				68" Lg.
Dia.	Dia. Tolerance	Finish Color	Max. Temperature, °F		Each
0.04"	-0.001" to 0.001"	Gray	500°	0000000	000000

Bend-and-Stay Economical 430 Stainless Steel Wire

When bent, this wire will stay in place. Widely used as tying and locking wire, this economical wire won’t stand up as well as other stainless steel wire when used outdoors or in extreme temperatures.

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

Spools

Spool

Temper Rating: Annealed (Softened)
Heat Treatable: No
Tensile Strength: 70,000 psi
Specifications Met: ASTM A580

			1/4 lb. Spool
Dia.	Dia. Tolerance	Max. Temperature, °F	Lg., ft.		Each
Matte
0.04"	-0.001" to 0.001"	300°	58	00000000	000000

Coils

Coil

Temper Rating: Annealed (Softened)
Heat Treatable: No
Tensile Strength: 70,000 psi
Specifications Met: ASTM A580

			1 lb. Coil
Dia.	Dia. Tolerance	Max. Temperature, °F	Lg., ft.		Each
Matte
0.04"	-0.001" to 0.001"	300°	230	00000000	000000

1-ft. Lengths

1-ft. Length

Temper Rating: Annealed (Softened)
Heat Treatable: No
Tensile Strength: 70,000 psi
Specifications Met: ASTM A580

				1 ft. Lg.
Dia.	Dia. Tolerance	Max. Temperature, °F	Pkg. Qty.		Pkg.
Matte
0.04"	-0.001" to 0.001"	300°	50	00000000	000000

Bend-and-Stay Corrosion-Resistant 316 Stainless Steel Wire

Bend this wire and it will stay in place. It's widely used as tying and locking wire. Made of 316/316L stainless steel, it has less carbon than standard 316 for better weldability. The addition of molybdenum gives this material excellent corrosion resistance. Use it in a variety of marine and chemical-processing applications.

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 ACTIVITY after your order ships.

Coils by Weight

Heat Treatment: Annealed (Softened)
Heat Treatable: No
Tensile Strength: 75,000 psi
Specifications Met: ASTM A580

			1/4 lb. Coil			1 lb. Coil
Dia.	Dia. Tolerance	Max. Temperature, °F	Lg., ft.		Each	Lg., ft.		Each
Mirror-Like
0.04"	-0.001" to 0.001"	400°	58	00000000	000000	233	00000000	000000

Coils by Length

Heat Treatment: Annealed (Softened)
Heat Treatable: No
Tensile Strength: 75,000 psi
Specifications Met: ASTM A580

			30 ft. Lg.
Dia.	Dia. Tolerance	Max. Temperature, °F		Each
Matte
0.04"	-0.001" to 0.001"	400°	000000000	000000

Lengths

Heat Treatment: Annealed (Softened)
Heat Treatable: No
Tensile Strength: 75,000 psi
Specifications Met: ASTM A580

				1 ft. Lg.
Dia.	Dia. Tolerance	Max. Temperature, °F	Pkg. Qty.		Pkg.
Matte
0.04"	-0.001" to 0.001"	400°	25	000000000	000000

Spring-Back Corrosion-Resistant 316 Stainless Steel Wire

Heat Treatable: No
Tensile Strength: 222,000 psi
Specifications Met: ASTM A313

This wire will spring back after bending. It's often used to make springs and wire rope. The addition of molybdenum gives 316 stainless steel excellent corrosion resistance. Use it in a variety of marine and chemical-processing applications.

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

			1/4 lb. Coil			1 lb. Coil
Dia.	Dia. Tolerance	Max. Temperature, °F	Lg., ft.		Each	Lg., ft.		Each
Matte
0.04"	-0.001" to 0.001"	570°	58	00000000	000000	230	00000000	000000

Bend-and-Stay Wear-Resistant 410 Stainless Steel Wire

Spool

Coil

Heat Treatment: Annealed (Softened)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Tensile Strength: 70,000 psi
Specifications Met: ASTM A580

Bend this wire and it will stay in place. It's commonly used as tying and locking wire. 410 stainless steel withstands wear caused by abrasion.

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

				1/4 lb. Spool			1 lb. Coil
Dia.	Dia. Tolerance	Fabrication	Max. Temperature, °F	Lg., ft.		Each	Lg., ft.		Each
Matte
0.04"	-0.001" to 0.001"	Cold Drawn	300°	58	0000000	00000	230	0000000	000000

Super-Elastic Nitinol Wire

Temper: Spring (Hardened)
Tensile Strength: 181,000 psi

Commonly used for eyeglass frames and antennas, this wire bounces back to its original shape after bending, stretching, and twisting. Nitinol is a nickel-titanium alloy.

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

2 ft. Lengths

Dia.	Dia. Tolerance	Finish	Specifications Met	Pkg. Qty.		Pkg.
0.04"	-0.0001" to 0.0001"	Black Oxide	ASTM F2063	5	0000000	000000

Shape-Memory Nitinol Wire

Temper Rating: Softened
Tensile Strength: 157,500 psi
Specifications Met: ASTM F2063

Bend this wire and it will hold its shape until you heat it. It is commonly used in automotive switches and latches. Nitinol is a nickel-titanium alloy.

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

Coils

Coil

Dia.	Dia. Tolerance	Lg., ft.	Finish	Max. Temperature, °F		Each
0.04"	-0.0008" to 0.0008"	30	Black Oxide	250°	00000000	0000000

2 ft. Lengths

Dia.	Dia. Tolerance	Lg., ft.	Finish	Max. Temperature, °F	Pkg. Qty.		Pkg.
0.04"	-0.0008" to 0.0008"	2	Black Oxide	250°	5	00000000	000000

Easy-to-Form Nickel Chromium Alloy

Spool

Temper Rating: Softened
Tensile Strength: 100,000 psi
Specifications Met: ASTM B267, ASTM B344

Bend this wire and it will stay in place. This nickel-chromium, often called Chromel C, provides effortless formability. Use it for heating elements, resistance windings, and hot-wire cutters.

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 ACTIVITY after your order ships.

1/8 lb. Spool
Dia.	Dia. Tolerance	Fabrication	Max. Temperature, °F	Electrical Resistivity	Lg., ft.		Each
Mirror-Like
0.04"	-0.002" to 0.002"	Cold Worked	1800°	0.416 ohms/ft	27	0000000	000000
1/4 lb. Spool
Mirror-Like
0.04"	-0.002" to 0.002"	Cold Worked	1800°	0.416 ohms/ft	55	0000000	00000
1 lb. Spool
Mirror-Like
0.04"	-0.002" to 0.002"	Cold Worked	1800°	0.416 ohms/ft	220	0000000	00000

Mirror-Like Multipurpose 110 Copper Wire

Temper Rating: Softened (Annealed)
Heat Treatable: No
Tensile Strength: 29,000 psi
Specifications Met: ASTM B3

This wire is polished to a mirror-like finish. Offering high electrical conductivity and formability, 110 copper is 99.9% pure. Also known as ETP copper, it's often used as grounding wire. It has a soft temper and will stay in place when bent.

1/4 lb. Spool
Dia.	Dia. Tolerance	Mechanical Finish	Lg., ft.		Each
0.04"	-0.0004" to 0.0004"	Polished	49	0000000	000000
1 lb. Spool
0.04"	-0.0004" to 0.0004"	Polished	195	0000000	00000
5 lb. Spool
0.04"	-0.0004" to 0.0004"	Polished	995	0000000	000000
15 lb. Spool
0.04"	-0.0004" to 0.0004"	Polished	2,985	0000000	000000

Tin-Coated Multipurpose 110 Copper Wire

Temper Rating: Softened (Annealed)
Heat Treatable: No
Tensile Strength: 29,000 psi
Specifications Met: ASTM B3

The tin coating provides a higher level of corrosion resistance and makes it easier to solder than Mirror-Like Multipurpose 110 Copper Wire. Offering high electrical conductivity and formability, 110 copper is 99.9% pure. Also known as ETP copper, it's often used as grounding wire. This wire has a soft temper and will stay in place when bent.

1/4 lb. Spool
Dia.	Dia. Tolerance	Lg., ft.		Each
0.04"	-0.0004" to 0.0004"	49	0000000	00000
1 lb. Spool
0.04"	-0.0004" to 0.0004"	195	0000000	00000
5 lb. Spool
0.04"	-0.0004" to 0.0004"	995	0000000	000000
15 lb. Spool
0.04"	-0.0004" to 0.0004"	2,985	0000000	000000

High-Temperature Nickel-Clad Copper

Spool

Temper Rating: Softened (Annealed)
Tensile Strength: 80,000 psi
Specifications Met: ASTM B355

This copper wire is clad in nickel to provide excellent corrosion resistance at temperatures up to 1200° F while maintaining high electrical conductivity. It has a soft temper and will stay in place when bent.

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 ACTIVITY after your order ships.

				1/4 lb. Spool			1 lb. Spool
Dia.	Dia. Tolerance	Mechanical Finish	Finish Thick.	Lg., ft.		Each	Lg., ft.		Each
Mirror-Like
0.04"	-0.0003" to 0.0003"	Polished	0.0108"	50	00000000	000000	200	00000000	0000000

Ultra-Formable 260 Brass Wire

Temper Rating: Softened (Annealed)
Heat Treatable: No
Tensile Strength: 50,000 psi
Specifications Met: ASTM B134

The most formable brass we offer, 260 offers better weldability than 300 series brass but it’s not as machinable. 260 brass is sometimes called cartridge brass. This wire has a soft temper and stays in place when bent.

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

			1/4 lb. Spool			1 lb. Spool
Dia.	Dia. Tolerance	Mechanical Finish	Lg., ft.		Each	Lg., ft.		Each
Mirror-Like
0.04"	-0.008" to 0.008"	Polished	52	0000000	00000	210	0000000	000000

Easy-to-Form 1100 Aluminum Wire

Spool

1-ft. Length

Yield Strength: 3,500 psi
Hardness: Not Rated (Soft)
Temper: O (Annealed)
Fabrication: Cold Drawn
Specifications Met: ASTM B211

This wire has a soft temper and will stay in place when bent. Use it as tie wire and for bundling. Because 1100 aluminum is 99% pure, it offers superior formability, corrosion resistance, and electrical conductivity.

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

Dia.	Dia. Tolerance	Lg., ft.	Heat Treatment	Max. Temperature, °F	Tensile Strength, psi	Weight, lb.	Container Type		Each
0.040"	-0.002" to 0.002"	165	Annealed (Softened)	200°	11,000	1/4	Spool	0000000	000000
0.040"	-0.002" to 0.002"	675	Annealed (Softened)	200°	11,000	1	Spool	0000000	00000
0.040"	-0.002" to 0.002"	3,390	Annealed (Softened)	200°	11,000	5	Spool	0000000	000000

						1 ft. Lg.
Dia.	Dia. Tolerance	Heat Treatment	Max. Temperature, °F	Tensile Strength, psi	Pkg. Qty.		Pkg.
0.040"	-0.002" to 0.002"	Annealed (Softened)	200°	11,000	10	0000000	00000

Hardened Undersized High-Speed M2 Tool Steel Rods

Yield Strength: Not Rated
Hardness: Rockwell C60 (Very Hard)

These rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.

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 ACTIVITY after your order ships.

Dia.	Dia. Tolerance	Drill Bit Size	Lg.	Mechanical Finish	Straightness Tolerance		Each
0.04"	-0.0002" to 0"	60	1 5/8"	Precision Ground	0.012" per ft.	00000000	00000

Hardened Oversized High-Speed M2 Tool Steel Rods

Yield Strength: Not Rated
Hardness: Rockwell C60 (Very Hard)

Also known as reamer blanks, these rods have an oversized diameter that allows for finishing to your exact requirements. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.

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 ACTIVITY after your order ships.

Dia.	Dia. Tolerance	Reamer Size	Lg.	Lg. Tolerance	Mechanical Finish	Straightness Tolerance		Each
0.04"	0" to 0.0002"	60	1 5/8"	-1/32" to 1/32"	Precision Ground	0.012" per ft.	00000000	00000

Ultra High-Temperature Molybdenum Wire

Spool

Hardness: Rockwell C59 (Very Hard)

Able to handle high melting points and conduct heat and electricity, this 99.95% pure molybdenum wire is often used in lights to create a support for filaments. It resists oxidation and won’t corrode. Molybdenum is better at conducting heat and electricity than tantalum and platinum, which also have high melting points. It is not, however, as corrosion resistant.

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

			Spool
Diameter	Diameter Tolerance	Melting Point Temperature, °F	Length, ft.		Each	Length, ft.		Each
0.04"	-0.000075" to 0.00075"	4753°	1	0000000	000000	5	0000000	0000000

Rosin Flux-Core Solder for Electronics and Electrical Applications

Rosin flux is quick acting with strong cleaning action, but leaves residue that requires flux remover. This solder is electrically conductive.

Material Composition
Tin	Lead	Melting Temperature, ° F	Dia.	Wt.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys
60%	40%	370°	0.040"	1 lbs.	00000000	000000
63%	37%	370°	0.040"	1 lbs.	00000000	00000

Rosin Flux-Core Lead-Free Solder for Electronics and Electrical Applications

Rosin flux is quick acting with strong cleaning action, but leaves residue that requires flux remover. This solder is electrically conductive. Product regulations restrict sales to the listed jurisdictions/areas.

Material Composition
Tin	Silver	Copper	Lead	Melting Temperature, ° F	Dia.	Wt.	Cannot Be Sold To		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
96.5%	3%	0.5%	0%	420°	0.040"	0.625 oz.	Outside United States and Canada	0000000	000000

Double-Loop Twist Ties

These ties have a loop on each end that can be twisted around each other for a secure closure.

Steel
Lg.	For Max. Bundle Dia.	Useful Life	Dia.	Gauge	For Use Outdoors	Color	Pkg. Qty.		Pkg.
4"	1/2"	Reusable	0.04"	19	No	Black	500	0000000	000000
6"	1"	Reusable	0.04"	19	No	Black	500	0000000	00000
8"	1 3/4"	Reusable	0.04"	19	No	Black	500	0000000	00000