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
0992FA00027 1/2"-20 4" Partially Threaded UNF Class 2B Right Hand External Hex 3/4" 18-8 Stainless Steel Coupling, Hex
0992FA00028 1/2"-20 5" Partially Threaded UNF Class 2B Right Hand External Hex 3/4" 18-8 Stainless Steel Coupling, Hex
0992FA00029 1/2"-20 6" Partially Threaded UNF Class 2B Right Hand External Hex 3/4" 18-8 Stainless Steel Coupling, Hex
0991FA00113 1/2"-28 1 1/4" Fully Threaded UNEF Class 2B Right Hand - - Black-Oxide Steel Coupling
0976FA00048 1/4"-20 5/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Black-Oxide Steel Coupling, Hex
0994FA00004 1/4"-20 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Zinc-Plated Steel Coupling, Hex
0991FA00021 1/4"-20 3/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00064 1/4"-20 3/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00087 1/4"-20 3/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0984FA00003 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0986FA00001 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 316 Stainless Steel Coupling, Hex
0988FA00007 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 6061 Aluminum Coupling, Hex
0976FA00058 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Black-Oxide Steel Coupling, Hex
0989FA00006 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Brass Coupling, Hex
0976FA00081 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Zinc-Flake-Coated Steel Coupling, Hex
0976FA00034 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Zinc-Plated Steel Coupling, Hex
0983FA00001 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Steel Coupling, Hex
0979FA00007 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0981FA00001 1/4"-20 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0990FA00007 1/4"-20 1" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Nylon 6/6 Plastic Coupling, Hex
0991FA00023 1/4"-20 1" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00065 1/4"-20 1" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00089 1/4"-20 1" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00025 1/4"-20 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00067 1/4"-20 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00091 1/4"-20 1 1/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0993FA00007 1/4"-20 1 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 7/16" Zinc-Plated Steel Coupling, Hex
0992FA00006 1/4"-20 3" Partially Threaded UNC Class 2B Right Hand External Hex 1/2" 18-8 Stainless Steel Coupling, Hex
0992FA00007 1/4"-20 6" Partially Threaded UNC Class 2B Right Hand External Hex 1/2" 18-8 Stainless Steel Coupling, Hex
0994FA00005 1/4"-28 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" Zinc-Plated Steel Coupling, Hex
0991FA00022 1/4"-28 3/4" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00088 1/4"-28 3/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0984FA00025 1/4"-28 7/8" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0989FA00019 1/4"-28 7/8" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" Brass Coupling, Hex
0976FA00035 1/4"-28 7/8" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" Zinc-Plated Steel Coupling, Hex
0986FA00002 1/4"-28 7/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" 316 Stainless Steel Coupling, Hex
0979FA00008 1/4"-28 7/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0981FA00020 1/4"-28 7/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0991FA00024 1/4"-28 1" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00066 1/4"-28 1" Fully Threaded UNF Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00090 1/4"-28 1" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00026 1/4"-28 1 1/4" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00068 1/4"-28 1 1/4" Fully Threaded UNF Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00092 1/4"-28 1 1/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0992FA00018 1/4"-28 3" Partially Threaded UNF Class 2B Right Hand External Hex 1/2" 18-8 Stainless Steel Coupling, Hex
0992FA00019 1/4"-28 6" Partially Threaded UNF Class 2B Right Hand External Hex 1/2" 18-8 Stainless Steel Coupling, Hex
0976FA00057 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Black-Oxide Steel Coupling, Hex
0976FA00080 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Zinc-Flake-Coated Steel Coupling, Hex
0976FA00032 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0994FA00002 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0984FA00002 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0986FA00019 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 316 Stainless Steel Coupling, Hex
0988FA00005 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 6061 Aluminum Coupling, Hex
0989FA00004 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Brass Coupling, Hex
0979FA00002 10-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0992FA00004 10-24 2" Partially Threaded UNC Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0976FA00033 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0994FA00003 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0984FA00024 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0986FA00020 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" 316 Stainless Steel Coupling, Hex
0988FA00006 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" 6061 Aluminum Coupling, Hex
0989FA00005 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" Brass Coupling, Hex
0990FA00006 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/8" Nylon 6/6 Plastic Coupling, Hex
0979FA00003 10-32 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0991FA00020 10-32 3/4" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00063 10-32 3/4" Fully Threaded UNF Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00086 10-32 3/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0990FA00001 10-32 1 3/4" Partially Threaded UNF Class 2B Right Hand External Hex 5/8" Nylon 6/6 Plastic Coupling, Hex
0992FA00005 10-32 2" Partially Threaded UNF Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0984FA00023 12-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" 18-8 Stainless Steel Coupling, Hex
0989FA00018 12-24 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/8" Brass Coupling, Hex
0993FA00016 2 1/2"-4 10" Partially Threaded UNC Class 2B Right Hand External Hex 4" Steel Coupling, Hex
0993FA00015 2 1/4"-4 1/2 9 1/2" Partially Threaded UNC Class 2B Right Hand External Hex 3 1/2" Steel Coupling, Hex
0976FA00028 2"-4 1/2 4 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2 3/4" Zinc-Plated Steel Coupling, Hex
0984FA00036 2"-4 1/2 6" Fully Threaded UNC Class 2B Right Hand External Hex 3 1/8" 18-8 Stainless Steel Coupling, Hex
0993FA00014 2"-4 1/2 9" Partially Threaded UNC Class 2B Right Hand External Hex 3 1/4" Steel Coupling, Hex
0984FA00018 2-56 5/16" Fully Threaded UNC Class 2B Right Hand External Hex 3/16" 18-8 Stainless Steel Coupling, Hex
0989FA00015 2-56 5/16" Fully Threaded UNC Class 2B Right Hand External Hex 3/16" Brass Coupling, Hex
0986FA00015 2-56 3/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/4" 316 Stainless Steel Coupling, Hex
0990FA00002 2-56 15/32" Fully Threaded UNC Class 2B Right Hand External Hex 3/16" Nylon 6/6 Plastic Coupling, Hex
0992FA00016 2-56 5/8" Partially Threaded UNC Class 2B Right Hand External Hex 1/4" 18-8 Stainless Steel Coupling, Hex
0992FA00017 2-56 11/16" Partially Threaded UNC Class 2B Right Hand External Hex 1/4" 18-8 Stainless Steel Coupling, Hex
0984FA00019 3-48 5/16" Fully Threaded UNC Class 2B Right Hand External Hex 1/4" 18-8 Stainless Steel Coupling, Hex
0989FA00016 3-48 5/16" Fully Threaded UNC Class 2B Right Hand External Hex 1/4" Brass Coupling, Hex
0991FA00054 3/4"-10 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00081 3/4"-10 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00124 3/4"-10 1 1/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0976FA00015 3/4"-10 1 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0976FA00054 3/4"-10 1 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Black-Oxide Steel Coupling, Hex
0991FA00055 3/4"-10 2" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00084 3/4"-10 2" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00127 3/4"-10 2" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0978FA00005 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Left Hand External Hex 1" Zinc-Plated Steel Coupling, Hex
0984FA00010 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" 18-8 Stainless Steel Coupling, Hex
0986FA00009 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" 316 Stainless Steel Coupling, Hex
0988FA00011 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" 6061 Aluminum Coupling, Hex
0976FA00064 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" Black-Oxide Steel Coupling, Hex
0989FA00013 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" Brass Coupling, Hex
0979FA00025 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00076 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" Hot-Dipped Galvanized Steel Coupling, Hex
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