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
0984FA00016 0-80 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1/8" 18-8 Stainless Steel Coupling, Hex
0986FA00014 0-80 3/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/4" 316 Stainless Steel Coupling, Hex
0992FA00014 0-80 5/8" Partially Threaded UNF Class 2B Right Hand External Hex 1/4" 18-8 Stainless Steel Coupling, Hex
0992FA00015 0-80 11/16" Partially Threaded UNF Class 2B Right Hand External Hex 1/4" 18-8 Stainless Steel Coupling, Hex
0976FA00026 1 1/2"-12 3 1/2" Fully Threaded UNF Class 2B Right Hand External Hex 2" Zinc-Plated Steel Coupling, Hex
0981FA00022 1 1/2"-12 3 1/2" Fully Threaded UNF Class 2B Right Hand External Hex 2 1/4" Zinc-Plated Steel Coupling, Hex
0984FA00034 1 1/2"-6 3 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2" 18-8 Stainless Steel Coupling, Hex
0989FA00032 1 1/2"-6 3 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2" Brass Coupling, Hex
0976FA00025 1 1/2"-6 3 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2" Zinc-Plated Steel Coupling, Hex
0979FA00024 1 1/2"-6 3 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2" Zinc-Plated Steel Coupling, Hex
0981FA00019 1 1/2"-6 3 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2 1/4" Zinc-Plated Steel Coupling, Hex
0983FA00009 1 1/2"-6 3 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 2 3/8" Steel Coupling, Hex
0976FA00068 1 1/2"-6 4" Fully Threaded UNC Class 2B Right Hand External Hex 2" Black-Oxide Steel Coupling, Hex
0993FA00011 1 1/2"-6 8" Partially Threaded UNC Class 2B Right Hand External Hex 2 3/8" Zinc-Plated Steel Coupling, Hex
0976FA00024 1 1/4"-12 3" Fully Threaded UNF Class 2B Right Hand External Hex 1 5/8" Zinc-Plated Steel Coupling, Hex
0981FA00021 1 1/4"-12 3" Fully Threaded UNF Class 2B Right Hand External Hex 1 7/8" Zinc-Plated Steel Coupling, Hex
0978FA00007 1 1/4"-7 3" Fully Threaded UNC Class 2B Left Hand External Hex 1 5/8" Zinc-Plated Steel Coupling, Hex
0984FA00033 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" 18-8 Stainless Steel Coupling, Hex
0986FA00013 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" 316 Stainless Steel Coupling, Hex
0976FA00067 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Black-Oxide Steel Coupling, Hex
0979FA00027 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00071 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00023 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Zinc-Plated Steel Coupling, Hex
0979FA00023 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Zinc-Plated Steel Coupling, Hex
0981FA00018 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 7/8" Zinc-Plated Steel Coupling, Hex
0983FA00008 1 1/4"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 2" Steel Coupling, Hex
0993FA00010 1 1/4"-7 7 1/2" Partially Threaded UNC Class 2B Right Hand External Hex 2" Zinc-Plated Steel Coupling, Hex
0984FA00032 1 1/8"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" 18-8 Stainless Steel Coupling, Hex
0986FA00012 1 1/8"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" 316 Stainless Steel Coupling, Hex
0976FA00079 1 1/8"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00009 1 1/8"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" Zinc-Plated Steel Coupling, Hex
0979FA00022 1 1/8"-7 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" Zinc-Plated Steel Coupling, Hex
0993FA00009 1 1/8"-7 7 1/2" Partially Threaded UNC Class 2B Right Hand External Hex 1 3/4" Zinc-Plated Steel Coupling, Hex
0976FA00027 1 3/4"-5 5" Fully Threaded UNC Class 2B Right Hand External Hex 2 3/8" Zinc-Plated Steel Coupling, Hex
0984FA00035 1 3/4"-5 5 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 2 3/4" 18-8 Stainless Steel Coupling, Hex
0993FA00013 1 3/4"-5 8 1/2" Partially Threaded UNC Class 2B Right Hand External Hex 2 3/4" Steel Coupling, Hex
0993FA00012 1 3/8"-6 8" Partially Threaded UNC Class 2B Right Hand External Hex 2 1/4" Steel Coupling, Hex
0976FA00022 1"-14 2 3/4" Fully Threaded UNS Class 2B Right Hand External Hex 1 3/8" Zinc-Plated Steel Coupling, Hex
0979FA00021 1"-14 2 3/4" Fully Threaded UNS Class 2B Right Hand External Hex 1 3/8" Zinc-Plated Steel Coupling, Hex
0981FA00017 1"-14 2 3/4" Fully Threaded UNS Class 2B Right Hand External Hex 1 1/2" Zinc-Plated Steel Coupling, Hex
0976FA00066 1"-8 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Black-Oxide Steel Coupling, Hex
0976FA00008 1"-8 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0984FA00012 1"-8 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" 18-8 Stainless Steel Coupling, Hex
0986FA00011 1"-8 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" 316 Stainless Steel Coupling, Hex
0976FA00056 1"-8 2 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Black-Oxide Steel Coupling, Hex
0978FA00001 1"-8 2 3/4" Fully Threaded UNC Class 2B Left Hand External Hex 1 3/8" Zinc-Plated Steel Coupling, Hex
0988FA00013 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" 6061 Aluminum Coupling, Hex
0989FA00014 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" Brass Coupling, Hex
0979FA00026 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00070 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00020 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" Zinc-Plated Steel Coupling, Hex
0979FA00006 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" Zinc-Plated Steel Coupling, Hex
0981FA00016 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" Zinc-Plated Steel Coupling, Hex
0983FA00007 1"-8 2 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Steel Coupling, Hex
0976FA00078 1"-8 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 3/8" Hot-Dipped Galvanized Steel Coupling, Hex
0994FA00012 1"-8 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/2" Zinc-Plated Steel Coupling, Hex
0976FA00021 1"-8 3" Fully Threaded UNC Class 2B Right Hand External Hex 1 5/8" Zinc-Plated Steel Coupling, Hex
0993FA00006 1"-8 7" Partially Threaded UNC Class 2B Right Hand External Hex 1 5/8" Zinc-Plated Steel Coupling, Hex
0984FA00017 1-72 5/16" Fully Threaded UNF Class 2B Right Hand External Hex 3/16" 18-8 Stainless Steel Coupling, Hex
0984FA00007 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0986FA00006 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" 316 Stainless Steel Coupling, Hex
0988FA00010 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" 6061 Aluminum Coupling, Hex
0989FA00010 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Brass Coupling, Hex
0976FA00006 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0976FA00052 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 7/8" Black-Oxide Steel Coupling, Hex
0991FA00045 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00076 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00111 1/2"-13 1 1/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0994FA00009 1/2"-13 1 1/2" Fully Threaded UNC Class 2B Right Hand External Hex 3/4" Zinc-Plated Steel Coupling, Hex
0991FA00047 1/2"-13 1 1/2" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00077 1/2"-13 1 1/2" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00114 1/2"-13 1 1/2" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0978FA00003 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Left Hand External Hex 11/16" Zinc-Plated Steel Coupling, Hex
0984FA00015 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" 18-8 Stainless Steel Coupling, Hex
0976FA00062 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Black-Oxide Steel Coupling, Hex
0989FA00011 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Brass Coupling, Hex
0976FA00074 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00042 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Zinc-Plated Steel Coupling, Hex
0979FA00015 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/4" Zinc-Plated Steel Coupling, Hex
0981FA00008 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 3/4" Zinc-Plated Steel Coupling, Hex
0983FA00003 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 7/8" Steel Coupling, Hex
0976FA00011 1/2"-13 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 7/8" Zinc-Plated Steel Coupling, Hex
0991FA00048 1/2"-13 2" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00078 1/2"-13 2" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00116 1/2"-13 2" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0992FA00012 1/2"-13 4" Partially Threaded UNC Class 2B Right Hand External Hex 3/4" 18-8 Stainless Steel Coupling, Hex
0993FA00002 1/2"-13 4" Partially Threaded UNC Class 2B Right Hand External Hex 7/8" Zinc-Plated Steel Coupling, Hex
0992FA00013 1/2"-13 6" Partially Threaded UNC Class 2B Right Hand External Hex 3/4" 18-8 Stainless Steel Coupling, Hex
0984FA00029 1/2"-20 1 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0986FA00007 1/2"-20 1 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" 316 Stainless Steel Coupling, Hex
0989FA00025 1/2"-20 1 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" Brass Coupling, Hex
0976FA00007 1/2"-20 1 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0991FA00046 1/2"-20 1 1/4" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00112 1/2"-20 1 1/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00115 1/2"-20 1 1/2" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0976FA00044 1/2"-20 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 11/16" Zinc-Plated Steel Coupling, Hex
0979FA00004 1/2"-20 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/4" Zinc-Plated Steel Coupling, Hex
0981FA00009 1/2"-20 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 3/4" Zinc-Plated Steel Coupling, Hex
0991FA00049 1/2"-20 2" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00117 1/2"-20 2" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
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