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
0992FA00026 7/16"-20 6" Partially Threaded UNF Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0989FA00031 7/8"-14 2 1/2" Fully Threaded UNF Class 2B Right Hand External Hex 1 1/4" Brass Coupling, Hex
0976FA00019 7/8"-14 2 1/2" Fully Threaded UNF Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0979FA00020 7/8"-14 2 1/2" Fully Threaded UNF Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0981FA00015 7/8"-14 2 1/2" Fully Threaded UNF Class 2B Right Hand External Hex 1 5/16" Zinc-Plated Steel Coupling, Hex
0976FA00055 7/8"-9 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 7/16" Black-Oxide Steel Coupling, Hex
0978FA00006 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Left Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0984FA00011 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" 18-8 Stainless Steel Coupling, Hex
0986FA00010 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" 316 Stainless Steel Coupling, Hex
0988FA00012 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" 6061 Aluminum Coupling, Hex
0976FA00065 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Black-Oxide Steel Coupling, Hex
0989FA00030 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Brass Coupling, Hex
0976FA00069 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00018 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0979FA00005 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0981FA00014 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/16" Zinc-Plated Steel Coupling, Hex
0983FA00006 7/8"-9 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" Steel Coupling, Hex
0993FA00005 7/8"-9 7" Partially Threaded UNC Class 2B Right Hand External Hex 1 3/8" Zinc-Plated Steel Coupling, Hex
0976FA00031 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0994FA00001 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0984FA00001 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0986FA00018 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 316 Stainless Steel Coupling, Hex
0988FA00004 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 6061 Aluminum Coupling, Hex
0989FA00003 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Brass Coupling, Hex
0990FA00005 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Nylon 6/6 Plastic Coupling, Hex
0979FA00001 8-32 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0991FA00019 8-32 3/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00062 8-32 3/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00085 8-32 3/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0992FA00003 8-32 1" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0984FA00013 9/16"-12 2 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 13/16" 18-8 Stainless Steel Coupling, Hex
0989FA00026 9/16"-12 2 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 13/16" Brass Coupling, Hex
0976FA00045 9/16"-12 2 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 13/16" Zinc-Plated Steel Coupling, Hex
0992FA00030 9/16"-12 5" Partially Threaded UNC Class 2B Right Hand External Hex 7/8" 18-8 Stainless Steel Coupling, Hex
0984FA00014 9/16"-18 2 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 13/16" 18-8 Stainless Steel Coupling, Hex
0989FA00027 9/16"-18 2 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 13/16" Brass Coupling, Hex
0976FA00046 9/16"-18 2 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 13/16" Zinc-Plated Steel Coupling, Hex
0992FA00031 9/16"-18 4" Partially Threaded UNF Class 2B Right Hand External Hex 7/8" 18-8 Stainless Steel Coupling, Hex
0992FA00032 9/16"-18 6" Partially Threaded UNF Class 2B Right Hand External Hex 7/8" 18-8 Stainless Steel Coupling, Hex
0991FA00009 M10 20 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0977FA00014 M10 24 mm Fully Threaded Metric Class 6H Right Hand External Hex 16 mm Black-Oxide Steel Coupling, Hex
0985FA00008 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm 18-8 Stainless Steel Coupling, Hex
0987FA00004 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm 316 Stainless Steel Coupling;Hex
0985FA00025 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Black-Oxide 18-8 Stainless Steel Coupling, Hex
0980FA00018 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Black-Oxide Steel Coupling, Hex
0989FA00039 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Brass Coupling, Hex
0982FA00011 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Steel Coupling, Hex
0980FA00003 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Zinc-Plated Steel Coupling, Hex
0982FA00003 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Zinc-Plated Steel Coupling, Hex
0977FA00023 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17 mm Zinc-Plated Steel Coupling, Hex
0988FA00020 M10 30 mm Fully Threaded Metric Class 6H Right Hand External Hex 17.5 mm 6061 Aluminum Coupling, Hex
0991FA00059 M10 30 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00010 M10 40 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00011 M10 50 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0992FA00048 M10 60 mm Partially Threaded Metric Class 6H Right Hand External Hex 16 mm 18-8 Stainless Steel Coupling, Hex
0991FA00060 M12 30 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0977FA00015 M12 32 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm Black-Oxide Steel Coupling, Hex
0985FA00009 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm 18-8 Stainless Steel Coupling, Hex
0987FA00005 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm 316 Stainless Steel Coupling;Hex
0988FA00021 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm 6061 Aluminum Coupling, Hex
0985FA00026 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Black-Oxide 18-8 Stainless Steel Coupling, Hex
0980FA00019 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Black-Oxide Steel Coupling, Hex
0989FA00040 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Brass Coupling, Hex
0982FA00012 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Steel Coupling, Hex
0980FA00004 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Zinc-Plated Steel Coupling, Hex
0982FA00004 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Zinc-Plated Steel Coupling, Hex
0977FA00024 M12 36 mm Fully Threaded Metric Class 6H Right Hand External Hex 19 mm Zinc-Plated Steel Coupling, Hex
0991FA00012 M12 40 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00013 M12 50 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0992FA00049 M12 72 mm Partially Threaded Metric Class 6H Right Hand External Hex 19 mm 18-8 Stainless Steel Coupling, Hex
0991FA00014 M14 30 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0991FA00015 M14 40 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0985FA00012 M14 42 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm 18-8 Stainless Steel Coupling, Hex
0987FA00010 M14 42 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm 316 Stainless Steel Coupling;Hex
0985FA00027 M14 42 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm Black-Oxide 18-8 Stainless Steel Coupling, Hex
0980FA00020 M14 42 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm Black-Oxide Steel Coupling, Hex
0980FA00011 M14 42 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm Zinc-Plated Steel Coupling, Hex
0977FA00025 M14 42 mm Fully Threaded Metric Class 6H Right Hand External Hex 22 mm Zinc-Plated Steel Coupling, Hex
0991FA00016 M16 30 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0977FA00017 M16 40 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm Black-Oxide Steel Coupling, Hex
0991FA00061 M16 40 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0985FA00010 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm 18-8 Stainless Steel Coupling, Hex
0987FA00006 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm 316 Stainless Steel Coupling;Hex
0980FA00021 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm Black-Oxide Steel Coupling, Hex
0989FA00041 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm Brass Coupling, Hex
0982FA00013 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm Steel Coupling, Hex
0980FA00005 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm Zinc-Plated Steel Coupling, Hex
0982FA00006 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm Zinc-Plated Steel Coupling, Hex
0977FA00026 M16 48 mm Fully Threaded Metric Class 6H Right Hand External Hex 24 mm Zinc-Plated Steel Coupling, Hex
0991FA00017 M16 50 mm Fully Threaded Metric Class 6H Right Hand - - 18-8 Stainless Steel Coupling
0992FA00050 M16 96 mm Partially Threaded Metric Class 6H Right Hand External Hex 24 mm 18-8 Stainless Steel Coupling, Hex
0985FA00013 M18 54 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm 18-8 Stainless Steel Coupling, Hex
0987FA00007 M18 54 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm 316 Stainless Steel Coupling;Hex
0980FA00022 M18 54 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm Black-Oxide Steel Coupling, Hex
0977FA00007 M18 54 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm Black-Oxide Steel Coupling, Hex
0980FA00012 M18 54 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm Zinc-Plated Steel Coupling, Hex
0977FA00033 M18 54 mm Fully Threaded Metric Class 6H Right Hand External Hex 27 mm Zinc-Plated Steel Coupling, Hex
0985FA00001 M2 6 mm Fully Threaded Metric Class 6H Right Hand External Hex 4 mm 18-8 Stainless Steel Coupling, Hex
0985FA00018 M2 6 mm Fully Threaded Metric Class 6H Right Hand External Hex 4 mm Black-Oxide 18-8 Stainless Steel Coupling, Hex
0989FA00033 M2 6 mm Fully Threaded Metric Class 6H Right Hand External Hex 4 mm Brass Coupling, Hex
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