0.031" Wire | McMaster-Carr

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

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

Forward

How can we improve?

49 Products

About Stainless Steel

View a wire gauge conversion chart.

About Tool Steel

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

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.

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.

Coils

Coil

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

				1/4 lbs. Coil			1 lbs. Coil
Dia.	Dia. Tolerance	Fabrication	Max. Temperature, °F	Lg., ft.		Each	Lg., ft.		Each
Matte
0.031"	-0.0005" to 0.0005"	Cold Drawn	570°	96	0000000	000000	385	0000000	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.
Matte
0.031"	-0.0005" to 0.0005"	Cold Drawn	570°	50	0000000	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
0.031"	-0.0005" to 0.0005"	Gray	500°	0000000	000000

Lubricated 1080 Spring Steel Wire

Heat Treatment: Hardened
Tensile Strength: 261,000 psi
Specifications Met: ASTM A228

Also known as music wire. This wire is coated with phosphate for corrosion resistance and lubricity. Use it for bundling and as tag wire. It will spring back after bending.

1/4 lbs. Coil
Dia.	Dia. Tolerance	Heat Treatment	Temperature Range	Lg., ft.		Each
0.031"	-0.0005" to 0.0005"	Hardened	Not Rated	110	0000000	00000
1 lbs. Coil
0.031"	-0.0005" to 0.0005"	Hardened	Not Rated	390	0000000	00000
5 lbs. Coil
0.031"	-0.0005" to 0.0005"	Hardened	Not Rated	1,955	0000000	00000

					1 ft. Lg.
Dia.	Dia. Tolerance	Heat Treatment	Temperature Range	Pkg. Qty.		Pkg.
0.031"	-0.0005" to 0.0005"	Hardened	Not Rated	100	0000000	000000

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 ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Drill Bit Size	Lg.	Mechanical Finish	Straightness Tolerance		Each
0.031"	-0.0002" to 0"	68	1 3/8"	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 ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Reamer Size	Lg.	Lg. Tolerance	Mechanical Finish	Straightness Tolerance		Each
0.031"	0" to 0.0002"	68	1 3/8"	-1/32" to 1/32"	Precision Ground	0.012" per ft.	00000000	00000

Ultra-Corrosion-Resistant Grade 2 Titanium Wire

Temper Rating: Softened (Annealed)
Tensile Strength: 50,000 psi
Specifications Met: ASTM B863

Bend this wire and it will stay in place. Because Grade 2 titanium is 99% pure, it is more corrosion resistant than Grades 5 and 9 but not as strong. It has good formability and weldability. Common uses include chemical-processing equipment, heat exchangers, and marine hardware.

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.

			1/8 lb. Coil			1/4 lb. Coil
Dia.	Dia. Tolerance	Max. Temperature, °F	Lg., ft.		Each	Lg., ft.		Each
Matte
0.031"	-0.003" to 0.003"	500°	84	00000000	000000	165	00000000	0000000

Platinum Wire

Hardness: Rockwell B97 (Medium)

99.95% pure, this platinum wire is used for applications that require a soft material that resists corrosion and oxidation and has a high melting point. This wire allows heat and electricity to pass and resists oxide buildup, making it ideal for thermocouple probes, which require accurate readings even at high temperatures. Soft enough to create a good seal between two flanges, it's also used to make high-vacuum O-rings. Platinum's softness means it won't damage the flanges, so they can be used again. The high melting point of this wire makes it a better choice for sealing heated flanges than other materials such as gold.

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

			Spool
Diameter	Diameter Tolerance	Melting Point Temperature, °F	Length, ft.		Each	Length, ft.		Each
0.031"	-0.00075" to 0.00075"	3215°	1	0000000	000000000	5	0000000	000000000

Gold Wire

Hardness: Rockwell B57 (Soft)

Used to make electrical connectors that are exposed to air and corrosive conditions, this 99.99% pure gold wire stays highly conductive where other conductors would fail. It also has a high melting point, low thermal resistance, and won’t oxidize, so it’s good for making parts that remain accurate in extreme environments. Compared to platinum, gold is more conductive but has a lower melting point. It’s often used to make O-rings, even for high-vacuum applications, because it’s soft enough to form a good seal when pressed between two flanges, yet won’t damage the flanges so you can reuse them.

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

Diameter	Diameter Tolerance	Length, ft.	Container Type	Melting Point Temperature, °F		Each
0.031"	-0.00075" to 0.00075"	1	Spool	1945°	00000000	0000000
0.031"	-0.00075" to 0.00075"	5	Spool	1945°	00000000	00000000

Difficult-to-Bend Corrosion-Resistant Small-Diameter Braided Wire—Not for Lifting

1 x 7

1 x 19

This braided wire has a stiff construction for use as bracing and guy wires. This stainless steel braided wire can handle corrosive environments, such as areas that are frequently washed down. Individual wire strands are preformed to maintain their shape and prevent rope from unraveling when cut. Extra-lubricated braided wire has an additional coating of lubrication for added wear and corrosion resistance.

18-8 Stainless Steel
Dia.	Capacity, lbs.	Recommended Pulley/Drum Dia.	Lubrication	Specifications Met	Lengths, ft.		Per Ft.
1 × 7—Strand Core
0.031"	30	Not Rated	Lubricated	__	50, 100, 250, 500	0000000	00000
0.031"	30	Not Rated	Extra Lubricated	MIL-DTL-87161	50, 100, 250, 500	00000000	000
1 × 19—Strand Core
0.031"	30	Not Rated	Lubricated	__	5, 10, 25, 50, 100, 250, 500	00000000	000

Corrosion-Resistant Small-Diameter Braided Wire—Not for Lifting

3 x 7

7 x 7

This stainless steel braided wire can handle corrosive environments, such as areas that are frequently washed down. This wire rope provides a good balance of abrasion resistance and flexibility. Preformed wire rope maintains its shape when cut and resists unraveling. Extra-lubricated braided wire has an additional coating of lubrication for added wear and corrosion resistance.

Strand core is more crush resistant than hollow core.

18-8 Stainless Steel
Dia.	Capacity, lbs.	Recommended Pulley/Drum Dia.	Lubrication	Preformed	Specifications Met	Lengths, ft.		Per Ft.
3 × 7—Hollow Core
0.031"	20	Not Rated	Lubricated	Yes	__	5, 10, 25, 50, 100, 250, 500	0000000	00000
0.031"	20	Not Rated	Extra Lubricated	Yes	MIL-DTL-83420	50, 100, 250, 500	0000000	000
7 × 7—Strand Core
0.031"	20	1 5/16"	Lubricated	Yes	__	25, 50, 100, 250, 500	00000000	000

Difficult-to-Bend Small-Diameter Braided Wire—Not for Lifting

This braided wire has a stiff construction for use as bracing and guy wires. This wire rope is often used for lightweight suspending applications, such as hanging light fixtures. The galvanized finish is corrosion resistant. Individual wire strands are preformed to maintain their shape and prevent rope from unraveling when cut. Extra-lubricated braided wire has an additional coating of lubrication for added wear and corrosion resistance.

Galvanized Steel
Dia.	Capacity, lbs.	Recommended Pulley/Drum Dia.	Lubrication	Specifications Met	Lengths, ft.		Per Ft.
1 × 7—Strand Core
0.031"	30	Not Rated	Extra Lubricated	MIL-DTL-87161	50, 100, 250, 500	0000000	00000

Nonsparking Corrosion-Resistant Small-Diameter Braided Wire—Not for Lifting

6 x 7

7 x 7

Not only is this phosphor bronze braided wire corrosion resistant, it inhibits sparking. This wire rope provides a good balance of abrasion resistance and flexibility.

Strand core are more crush resistant than fiber core.

Phosphor Bronze
Dia.	Capacity, lbs.	Recommended Pulley/Drum Dia.	Lubrication	Preformed	Lengths, ft.		Per Ft.
6 × 7—Fiber Core
0.031"	8	1 5/16"	Lubricated	No	10, 25, 50, 100, 300	0000000	00000
7 × 7—Strand Core
0.031"	8	1 5/16"	Lubricated	No	10, 25, 50, 100, 300	0000000	0000

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	Silver	Melting Temperature, ° F	Dia.	Wt.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
60%	40%	__	370°	0.031"	1/2 oz.	0000000	00000
60%	40%	__	370°	0.031"	1 lbs.	000000	00000
62%	36%	2%	370°	0.031"	1 lbs.	0000000	000000
63%	37%	__	360°	0.031"	1 lbs.	0000000	00000

Solder for Electronics and Electrical Applications

This solder is electrically conductive. It does not have a flux core, so you can choose the flux that works best for your application.

Material Composition				1 lbs.
Tin	Lead	Melting Temperature, ° F	Dia.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
60%	40%	375°	0.031"	0000000	000000
63%	37%	360°	0.031"	000000	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.

Material Composition
Tin	Silver	Antimony	Copper	Lead	Melting Temperature, ° F	Dia.	Wt.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys
97%	0.2%	0.8%	2%	0%	425°	0.031"	1 lbs.	0000000	000000
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
96.5%	3%	__	0.5%	0%	420°	0.031"	0.375 oz.	0000000	0000
96.5%	3%	__	0.5%	0%	420°	0.031"	1 lbs.	0000000	000000
97%	__	__	3%	0%	445°	0.031"	1 lbs.	0000000	00000

No-Clean Flux-Core Lead-Free Solder for Electronics and Electrical Applications

This flux leaves minimal residue so there's no cleanup. This solder is electrically conductive.

Material Composition
Tin	Silver	Copper	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
96.5%	3%	0.5%	0%	420°	0.031"	1	0000000	0000000

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

Acid flux has strong cleaning action, but leaves corrosive residue that washes away with water. This solder is electrically conductive.

Material Composition
Tin	Copper	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
97%	3%	0%	445°	0.031"	1	000000	000000

Lead-Free Solder for Electronics and Electrical Applications

This solder is electrically conductive. Without a flux core, it allows you to choose the flux that works best for your application.

Material Composition
Tin	Copper	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
97%	3%	0%	445°	0.031"	1	0000000	000000

Rosin Flux-Core High-Melting-Point Solder for Electronics and Electrical Applications

Rosin flux is quick acting with strong cleaning action, but leaves residue that requires flux remover. The high melting point of this solder prevents remelting when soldering successive joints with another solder. It is electrically conductive.

Material Composition
Tin	Lead	Silver	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
10%	88%	2%	570°	0.031"	1	0000000	000000

Solder for Torch Soldering

This solder does not have a flux core, so you can choose the flux that works best for your application.

Material Composition				1 lbs.		5 lbs.
Tin	Lead	Melting Temperature, ° F	Dia.		Each		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
40%	60%	460°	0.031"	0000000	000000	0000000	0000000

No-Clean Flux-Core Lead-Free Solder for High-Temperature Applications

The flux leaves minimal residue so there's no cleanup. The solder keeps its strength in applications where vibration and frequent and extreme temperature changes occur, such as in water lines and refrigeration equipment.

Material Composition
Tin	Antimony	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
95%	5%	0%	460°	0.031"	1	0000000	000000

Easy-Clean Flux-Core Lead-Free Solder for High-Temperature Applications

The flux residue easily washes away with water. The solder keeps its strength in applications where vibration and frequent and extreme temperature changes occur, such as in water lines and refrigeration equipment.

Material Composition
Tin	Antimony	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
95%	5%	0%	460°	0.031"	1	0000000	000000

Rosin Flux-Core Lead-Free Solder for High-Temperature Applications

Rosin flux is quick acting with strong cleaning action, but leaves residue that requires flux remover. The solder keeps its strength in applications where vibration and frequent and extreme temperature changes occur, such as in water lines and refrigeration equipment.

Material Composition
Tin	Antimony	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
95%	5%	0%	460°	0.031"	1	0000000	000000

Rosin Flux-Core Lead-Free Solder for HVAC Applications

Rosin flux is quick acting with strong cleaning action, but leaves residue that requires flux remover. This solder resists vibration to form strong joints in HVAC systems.

Material Composition
Tin	Silver	Lead	Melting Temperature, °F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys
95%	5%	0%	430°	0.031"	1	0000000	0000000
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
96%	4%	0%	430°	0.031"	1	0000000	000000

No-Clean Flux-Core Solder for HVAC Applications

The flux leaves minimal residue so there's no cleanup. This solder resists vibration to form strong joints in HVAC systems.

Material Composition
Tin	Lead	Silver	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
62%	36%	2%	370°	0.031"	1	000000	000000
63%	37%	__	360°	0.031"	1	000000	00000

Easy-Clean Flux-Core Solder for HVAC Applications

The flux residue easily washes away with water. This solder resists vibration to form strong joints in HVAC systems.

Material Composition
Tin	Lead	Melting Temperature, ° F	Dia.	Wt., lbs.		Each
For Joining Brass, Bronze, Copper, Nickel Alloys, Stainless Steel, Steel
63%	37%	360°	0.031"	1	000000	000000