M33 Threaded Rods | McMaster-Carr

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.

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

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M33
300 mm	3.5	125,000	Rockwell C35	ASTM A193, DIN 976	000000000	0000000
1 m	3.5	125,000	Rockwell C35	ASTM A193, DIN 976	000000000	000000
2 m	3.5	125,000	Rockwell C35	ASTM A193, DIN 976	000000000	000000

Medium-Strength Steel Threaded Rods—Class 8.8

An economical alternative to Grade B7 and Grade B16 threaded rods, these metric Class 8.8 rods are suitable for fastening most machinery and equipment.

Zinc-plated steel threaded rods resist corrosion in wet environments.

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

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M33
300 mm	3.5	110,000	Rockwell C20	DIN 975	000000000	000000
1 m	3.5	110,000	Rockwell C20	DIN 975	000000000	000000
Zinc-Plated Steel
M33
1 m	3.5	110,000	Rockwell C20	DIN 975	000000000	000000

Metric Low-Strength Steel Threaded Rods

These threaded rods are about half the strength of medium-strength steel threaded rods for light duty hanging, mounting, and fastening.

Zinc-plated steel threaded rods are corrosion resistant in wet environments.

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

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M33
300 mm	3.5	50,000	Rockwell B49	DIN 976	1	000000000	000000
1 m	3.5	50,000	Rockwell B49	DIN 976	1	000000000	000000
Zinc-Plated Steel
M33
300 mm	3.5	50,000	Rockwell B49	DIN 976	1	000000000	000000
1 m	3.5	50,000	Rockwell B49	DIN 976	1	000000000	000000

Metric 18-8 Stainless Steel Threaded Rods

These 18-8 stainless steel threaded rods have good chemical resistance and may be mildly magnetic.

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

18-8 Stainless Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M33
300 mm	3.5	70,000	Not Rated	DIN 976	1	000000000	0000000
1 m	3.5	70,000	Not Rated	DIN 976	1	000000000	000000
2 m	3.5	70,000	Not Rated	DIN 976	1	000000000	000000

Metric Medium-Strength Steel Coupling Nuts—Class 8

Often referred to as extension nuts, use these to connect and extend threaded rods. They're comparable in strength to Class 8.8 bolts.

Zinc-plated steel coupling nuts resist corrosion in wet environments.

Black-oxide steel coupling nuts have a dark surface color and are mildly corrosion resistant in dry environments.

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

Thread						Each
Size	Pitch, mm	Lg., mm	Wd., mm	Specifications Met		1-9	10-Up
Zinc-Plated Steel—Class 8
M33	3.5	99	50	DIN 6334	000000000	000000	000000
Black-Oxide Steel—Class 8
M33	3.5	99	50	DIN 6334	000000000	00000	00000

Metric 18-8 Stainless Steel Coupling Nuts

Stainless Steel

Made from 18-8 stainless steel, these metric coupling nuts have good chemical resistance and may be mildly magnetic. Also known as extension nuts, use them to connect and extend threaded rods.

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

Thread						Each
Size	Pitch, mm	Lg., mm	Wd., mm	Specifications Met		1-9	10-Up
18-8 Stainless Steel
M33	3.5	99	50	DIN 6334	000000000	0000000	000000

About Threaded Studs and Rods

About Nuts, Materials, and Finishes

Metric High-Strength Steel Threaded Rods—Class 10.9

Metric Medium-Strength Steel Threaded Rods—Grade B7

Medium-Strength Steel Threaded Rods—Class 8.8

Metric Low-Strength Steel Threaded Rods

Metric 18-8 Stainless Steel Threaded Rods

Metric Medium-Strength Steel Coupling Nuts—Class 8

Metric 18-8 Stainless Steel Coupling Nuts