19mm Rods | McMaster-Carr

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into low-strength fasteners, pins, and axles. You can surface harden this material for added wear resistance. All have been manufactured to meet ASTM standards for quality and performance.

Cold-worked rods and discs have a finished look and quality. The cold-working process gives the steel consistent strength, hardness, and dimensions throughout.

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

Dia., mm	Dia. Tolerance, mm	Yield Strength, psi	Fabrication	Hardness	Max. Hardness After Heat Treatment	Specifications Met		1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	4 ft. Lg.	6 ft. Lg.
19	-0.05 to 0	60,000	Cold Worked	Rockwell B70 (Medium)	Not Rated	ASTM A108	0000000	000000	000000	000000	0000000	0000000

Tight-Tolerance Multipurpose 4140 Alloy Steel Rods

Yield Strength: 60,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Fabrication: Cold Drawn
Specifications Met: ASTM A108

Ready for turning in your lathe, these rods are precision ground and held to a strict straightness tolerance. Also known as chrome-moly steel, this versatile alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress. For added wear resistance, you can surface harden these rods with heat treating. They are manufactured to ASTM A108 standards for performance and quality.

Note: Rods may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.

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

Dia.	Dia. Tolerance	Heat Treatment	Mechanical Finish	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
19mm	-0.013mm to 0mm	Annealed (Softened)	Precision Ground	1/16" per 3 ft.	00000000	000000	000000	0000000

Tight-Tolerance Multipurpose Air-Hardening A2 Tool Steel Rods

Precision ground and held to a strict straightness tolerance, these rods are ready for turning in your lathe. Also known as drill rod, this A2 tool steel is more wear resistant than O1 and keeps a sharper cutting edge. It’s air-hardening, so it doesn’t require baths or quenching after heat treatment. This tool steel is often used for punches, blades, and hammers. These rods have been manufactured to ASTM A681 standards for performance and quality.

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

Metric Rods

Yield Strength: 55,000 psi
Hardness: See table
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C62
Fabrication: Hot Rolled
Specifications Met: ASTM A681

Dia., mm	Dia. Tolerance, mm	Heat Treatment	Hardness	Mechanical Finish	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
19	-0.025 to 0.025	Annealed (Softened)	Rockwell B101	Precision Ground	0.0125" per ft.	0000000	000000	0000000	0000000

Tight-Tolerance Multipurpose Oil-Hardening O1 Tool Steel Rods

Yield Strength: 50,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Maximum Hardness After Heat Treatment: Rockwell C65
Fabrication: Hot Rolled
Specifications Met: ASTM A681

Ready for turning in a lathe, these rods are precision ground to a tight diameter tolerance. They’re also known as drill rod. Often used for dies, punches, and gauges, O1 tool steel is an oil-hardening material that resists wear and abrasion. It can also be surface hardened with heat treating for added wear resistance. These rods have been manufactured to meet ASTM A681 standards for performance and quality.

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

Dia.	Dia. Tolerance	Heat Treatment	Mechanical Finish		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
19mm	-0.025mm to 0.025mm	Annealed (Softened)	Precision Ground	00000000	000000	000000	000000

Multipurpose 304 Stainless Steel

From cookware to chemical-processing equipment, 304 stainless steel is a good all-around choice for a wide range of applications. It maintains its corrosion resistance in temperatures up to 1500° F.

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

304 Stainless Steel Rods

Yield Strength: 30,000 psi
Hardness: Rockwell B80 (Medium)
Heat Treatment: Annealed (Softened)
Heat Treatable: No

Dia., mm	Dia.Tolerance, mm	Fabrication	Straightness Tolerance		1 ft. Lg.	1 1/2 ft. Lg.	3 ft. Lg.
19	-0.084 to 0	Cold Worked	1 mm per 1 m	0000000	000000	000000	0000000

Thread-Mount Idler Rotary Shafts

With Retaining Ring Groove

Thread these shafts into a tapped hole to support idler sprockets and pulleys in tensioning applications.

Shafts with retaining ring grooves come with a retaining ring and spacers to position your component and hold it in place.

		Overall		Thread			Groove
Dia.	Lg.	Lg.	Dia.	Size	Pitch	Lg.	Wd.	Dia.	End-to-Groove Lg.	Edge Type	Hardness Rating	Hardness		Each
Metric with Retaining Ring Grooves—Zinc-Plated 1215 Carbon Steel
10mm	11mm	34mm	19mm	M8	1.25 mm	10.66mm	0.99mm	7.69mm	3.12mm	Chamfered	Medium	Rockwell B84	0000000	000000

Ultra-High-Temperature Quartz Glass Rods and Discs

Color: Clear
Max. Temperature: 2100° F
Fabrication: Annealed

Able to withstand temperatures up to 2100° F, this quartz glass is useful in high-temperature applications that also require optical clarity, such as high-intensity lighting, fiber-optic production, and optical lens systems. It provides excellent UV transmission, as well as high transmission in the visible and infrared ranges.

Rods

				12" Lg.
Dia., mm	Dia. Tolerance, mm	Edge Fabrication	Lg. Tolerance		Each
19	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	000000