Metric Coupling Nuts

Metric Coupling Nuts are internally threaded fasteners that pair with bolts and threaded rod to complete a joint. Choosing the right nut style and grade keeps a joint tight under load, vibration, and changing conditions. South Coast Fasteners keeps Metric Coupling Nuts in stock and ready to ship, with fast 3-5 day shipping. Popular options include stainless steel metric coupling nuts and zinc plated metric coupling nuts.

Product Name	Diameter 1	Thread Pitch	Width	Length	Thread	Material	Finish
0.00000	M4-0.70 Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621033	M4	0.70			Coarse	Class 6 Steel	Zinc Cr+3	View Details
0.00000	M5-0.80 x 8 MM x 15 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621035	M5	0.80	8 MM	15 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
65.89200	M6-1.00 x 18 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043037	M6	1.00	18 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
0.00000	M6-1.00 x 10 MM x 18 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621038	M6	1.00	10 MM	18 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
117.18500	M8-1.25 x 24 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043042	M8	1.25	24 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
0.00000	M8-1.25 x 13 MM x 24 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621042	M8	1.25	13 MM	24 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
109.13850	M10-1.50 x 30 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043045	M10	1.50	30 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
0.00000	M10-1.50 x 17 MM x 30 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621046	M10	1.50	17 MM	30 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
166.56900	M12-1.75 x 36 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043051	M12	1.75	36 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
0.00000	M12-1.75 x 19 MM x 36 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621050	M12	1.75	19 MM	36 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
0.00000	M14-2.00 x 22 MM x 42 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621052	M14	2.00	22 MM	42 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
176.48450	M16-2.00 x 48 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043160	M16	2.00	48 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
0.00000	M16-2.00 x 24 MM x 48 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621054	M16	2.00	24 MM	48 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
136.72000	M20-2.50 x 60 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043200	M20	2.50	60 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
67.20380	M20-2.50 x 30 MM x 60 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621058	M20	2.50	30 MM	60 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
292.52150	M24-3.00 x 72 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Stainless Steel A2-70 (18-8)	043240	M24	3.00	72 MM		Coarse	Stainless Steel A2-70 (18-8)		View Details
0.00000	M24-3.00 x 36 MM x 72 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621062	M24	3.00	36 MM	72 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details
0.00000	M30-3.50 x 46 MM x 90 MM Metric Hex Coupling Nuts, Coarse, DIN 6334, Class 6 Steel, Zinc Cr+3	621066	M30	3.50	46 MM	90 MM	Coarse	Class 6 Steel	Zinc Cr+3	View Details

Showing 1-18 of 18 Results

Showing 1-18 of 18 Results

Materials and Finishes

Choose Metric Coupling Nuts by grade and finish, with carbon steel for general work, alloy for strength, and stainless for corrosion resistance, plus zinc and hot-dip galvanized options for the outdoors. Pair them with rods and studs, environmental, and Bolts to round out the assembly.

How to Choose

Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.

Metric Coupling Nuts Industry Applications

Metric Coupling Nuts earn a place in shops, on jobsites, and on production floors. Construction and automotive thread them onto bolts and rod to clamp assemblies, while petrochemical lock joints against vibration with them. Nylon-insert and all-metal locking patterns in grade 5, grade 8, and stainless. Stocked in metric DIN and ISO sizes.

Frequently Asked Questions

What materials and finishes are metric coupling nuts available in?

Choose Metric Coupling Nuts by grade and finish, with carbon steel for general work, alloy for strength, and stainless for corrosion resistance, plus zinc and hot-dip galvanized options for the outdoors. Common options include coupling nuts and stainless steel coupling nuts.

What are metric coupling nuts used for?

Metric Coupling Nuts are specified across construction, automotive, and petrochemical, from structural framing and heavy equipment to machinery and general repair.

How do I choose the right metric coupling nuts?

Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.

Can I order in bulk or request a quote?

Yes. Stock covers small orders and full production runs. Reach out for a quote or product help.

Why Choose South Coast Fasteners?

South Coast Fasteners stocks fasteners, PPE, hand tools, cutting tools, abrasives, and industrial supplies at competitive pricing, with fast shipping and a team that works the products daily. We also stock Flat Washers and fasteners.