Coupling Nuts

622 products

Coupling Nuts

Coupling Nuts are elongated fasteners designed to connect two threaded rods, pipes, or fittings end-to-end in applications requiring extended length or alignment adjustment. At Skdin, we offer high-quality Coupling Nuts in various lengths, diameters, and materials, including carbon steel, stainless steel, and brass variants. Our coupling nuts feature internal threading throughout their entire length, providing a secure connection point for joining threaded components while maintaining proper alignment and load distribution. These nuts are essential for construction, plumbing, and industrial applications where extended threaded connections are required. Explore our selection to find the perfect coupling nuts for your specific connection requirements.

System of Measurement
Inch Metric
Thread Size
0-80 1 1/2"-12 1 1/2"-6 1 1/4"-12 1 1/4"-7 1 1/8"-7 1 3/4"-5 1 3/8"-6 1"-14 1"-8 1-72 1/2"-13 1/2"-20 1/2"-28 1/4"-20 1/4"-28 10-24 10-32 12-24 2 1/2"-4 2 1/4"-4 1/2 2"-4 1/2 2-56 3-48 3/4"-10 3/4"-16 3/8"-16 3/8"-24 3/8"-32 4-40 5-40 5/16"-18 5/16"-24 5/8"-11 5/8"-18 6-32 7/16"-14 7/16"-20 7/8"-14 7/8"-9 8-32 9/16"-12 9/16"-18 M10 M12 M14 M16 M18 M2 M2.5 M20 M22 M24 M27 M3 M3.5 M30 M33 M36 M4 M5 M6 M8
Material
18-8 Stainless Steel 316 Stainless Steel 6061 Aluminum Black-Oxide 18-8 Stainless Steel Black-Oxide Steel Brass Hot-Dipped Galvanized Steel Nylon 6/6 Plastic Steel Zinc-Flake-Coated Steel Zinc-Plated Steel
Nut Type
Coupling Coupling, Hex Coupling;Hex
Width
1/8" 3/16" 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16" 7/8" 15/16" 1" 1 1/16" 1 1/8" 1 1/4" 1 5/16" 1 3/8" 1 7/16" 1 1/2" 1 5/8" 1 3/4" 1 7/8" 2" 2 1/4" 2 3/8" 2 3/4" 3 1/8" 3 1/4" 3 1/2" 4" 4 mm 4.5 mm 5 mm 6 mm 7 mm 8 mm 10 mm 13 mm 14 mm 16 mm 17 mm 17.5 mm 19 mm 22 mm 24 mm 27 mm 30 mm 32 mm 36 mm 38 mm 41 mm 46 mm 50 mm 55 mm
Thread Type
Metric UNC UNEF UNF UNS
Thread Direction
Left Hand Right Hand
Thread Pitch
0.4 mm 0.45 mm 0.5 mm 0.6 mm 0.7 mm 0.8 mm 1 mm 1.25 mm 1.5 mm 1.75 mm 2 mm 2.5 mm 3 mm 3.5 mm 4 mm
Length
1/4" 5/16" 3/8" 7/16" 15/32" 1/2" 5/8" 11/16" 3/4" 7/8" 15/16" 1" 1 1/8" 1 1/4" 1 1/2" 1 5/8" 1 3/4" 1 7/8" 2" 2 1/8" 2 1/4" 2 1/2" 2 3/4" 3" 3 1/2" 4" 4 1/2" 5" 5 1/4" 6" 7" 7 1/2" 8" 8 1/2" 9" 9 1/2" 10" 6 mm 9 mm 10 mm 12 mm 15 mm 16 mm 18 mm 19 mm 20 mm 24 mm 25 mm 30 mm 32 mm 36 mm 40 mm 42 mm 48 mm 50 mm 51 mm 54 mm 60 mm 64 mm 66 mm 72 mm 81 mm 90 mm 96 mm 99 mm 108 mm 120 mm 132 mm 144 mm
Threading
Fully Threaded Partially Threaded
Fastener Strength Grade/Class
ASTM Grade 2H Class 10 Class 8 Grade 2 Grade 5 Grade 8
OD
19/64" 23/64" 27/64" 31/64" 37/64" 55/64" 63/64" 8 mm 10 mm 11 mm 13 mm 15 mm 18 mm 22 mm 28 mm
Sight Hole Diameter
1/16" 5/64" 3/32" 1/8" 3/16" 1/4"
Show more▼
Part Number Thread Size Length Threading Thread Type Thread Fit Thread Direction Drive Style Width Material Nut Type
0977FA00021 M6 18 mm Fully Threaded Metric Class 6H Right Hand External Hex 10 mm Zinc-Plated Steel Coupling, Hex
0991FA00003 M6 20 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00057 M6 25 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00004 M6 30 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0992FA00046 M6 36 mm Partially Threaded Metric Class 6H Right Hand External Hex 10 mm 18-8 Stainless Steel Coupling, Hex
0977FA00013 M8 19 mm Fully Threaded Metric Class 6H Right Hand External Hex 14 mm Black-Oxide Steel Coupling, Hex
0991FA00005 M8 20 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0985FA00007 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm 18-8 Stainless Steel Coupling, Hex
0987FA00003 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm 316 Stainless Steel Coupling;Hex
0988FA00019 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm 6061 Aluminum Coupling, Hex
0985FA00024 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Black-Oxide 18-8 Stainless Steel Coupling, Hex
0980FA00017 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Black-Oxide Steel Coupling, Hex
0989FA00038 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Brass Coupling, Hex
0982FA00010 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Steel Coupling, Hex
0980FA00002 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Zinc-Plated Steel Coupling, Hex
0982FA00002 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Zinc-Plated Steel Coupling, Hex
0977FA00022 M8 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 13 mm Zinc-Plated Steel Coupling, Hex
0991FA00058 M8 25 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00006 M8 30 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00007 M8 40 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0992FA00047 M8 48 mm Partially Threaded Metric Class 6H Right Hand External Hex 13 mm 18-8 Stainless Steel Coupling, Hex
0991FA00008 M8 50 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
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