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
0976FA00014 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" Zinc-Plated Steel Coupling, Hex
0979FA00018 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1" Zinc-Plated Steel Coupling, Hex
0981FA00012 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/8" Zinc-Plated Steel Coupling, Hex
0994FA00011 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/8" Zinc-Plated Steel Coupling, Hex
0983FA00005 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Steel Coupling, Hex
0976FA00016 3/4"-10 2 1/4" Fully Threaded UNC Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0976FA00077 3/4"-10 3" Fully Threaded UNC Class 2B Right Hand External Hex 1" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00043 3/4"-10 3" Fully Threaded UNC Class 2B Right Hand External Hex 1" Zinc-Plated Steel Coupling, Hex
0992FA00039 3/4"-10 4" Partially Threaded UNC Class 2B Right Hand External Hex 1 1/8" 18-8 Stainless Steel Coupling, Hex
0992FA00040 3/4"-10 5" Partially Threaded UNC Class 2B Right Hand External Hex 1 1/8" 18-8 Stainless Steel Coupling, Hex
0993FA00004 3/4"-10 5" Partially Threaded UNC Class 2B Right Hand External Hex 1 1/4" Zinc-Plated Steel Coupling, Hex
0992FA00041 3/4"-10 8" Partially Threaded UNC Class 2B Right Hand External Hex 1 1/8" 18-8 Stainless Steel Coupling, Hex
0991FA00082 3/4"-16 1 1/4" Fully Threaded UNF Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00125 3/4"-16 1 1/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00083 3/4"-16 1 1/2" Fully Threaded UNF Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00126 3/4"-16 1 1/2" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00056 3/4"-16 2" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00128 3/4"-16 2" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0984FA00031 3/4"-16 2 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1" 18-8 Stainless Steel Coupling, Hex
0986FA00026 3/4"-16 2 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1" 316 Stainless Steel Coupling, Hex
0989FA00029 3/4"-16 2 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1" Brass Coupling, Hex
0976FA00017 3/4"-16 2 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1" Zinc-Plated Steel Coupling, Hex
0979FA00019 3/4"-16 2 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1" Zinc-Plated Steel Coupling, Hex
0981FA00013 3/4"-16 2 1/4" Fully Threaded UNF Class 2B Right Hand External Hex 1 1/8" Zinc-Plated Steel Coupling, Hex
0992FA00042 3/4"-16 4" Partially Threaded UNF Class 2B Right Hand External Hex 1 1/8" 18-8 Stainless Steel Coupling, Hex
0992FA00043 3/4"-16 5" Partially Threaded UNF Class 2B Right Hand External Hex 1 1/8" 18-8 Stainless Steel Coupling, Hex
0991FA00036 3/8"-16 3/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00072 3/8"-16 3/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00101 3/8"-16 3/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0976FA00050 3/8"-16 1" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Black-Oxide Steel Coupling, Hex
0991FA00038 3/8"-16 1" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00073 3/8"-16 1" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00103 3/8"-16 1" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0984FA00005 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" 18-8 Stainless Steel Coupling, Hex
0986FA00004 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" 316 Stainless Steel Coupling, Hex
0988FA00009 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" 6061 Aluminum Coupling, Hex
0989FA00008 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Brass Coupling, Hex
0976FA00003 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0994FA00008 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 9/16" Zinc-Plated Steel Coupling, Hex
0976FA00010 3/8"-16 1 1/8" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Zinc-Plated Steel Coupling, Hex
0991FA00041 3/8"-16 1 1/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00105 3/8"-16 1 1/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00042 3/8"-16 1 1/2" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00074 3/8"-16 1 1/2" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00107 3/8"-16 1 1/2" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0978FA00002 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Left Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0984FA00006 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0976FA00060 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Black-Oxide Steel Coupling, Hex
0989FA00009 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Brass Coupling, Hex
0976FA00072 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Hot-Dipped Galvanized Steel Coupling, Hex
0976FA00083 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Zinc-Flake-Coated Steel Coupling, Hex
0976FA00038 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0979FA00011 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0981FA00004 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0983FA00002 3/8"-16 1 3/4" Fully Threaded UNC Class 2B Right Hand External Hex 11/16" Steel Coupling, Hex
0986FA00023 3/8"-16 1 3/4" Partially Threaded UNC Class 2B Right Hand External Hex 1/2" 316 Stainless Steel Coupling, Hex
0991FA00043 3/8"-16 2" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00075 3/8"-16 2" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00109 3/8"-16 2" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0992FA00010 3/8"-16 4" Partially Threaded UNC Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0993FA00001 3/8"-16 4" Partially Threaded UNC Class 2B Right Hand External Hex 3/4" Zinc-Plated Steel Coupling, Hex
0992FA00011 3/8"-16 6" Partially Threaded UNC Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0991FA00037 3/8"-24 3/4" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00102 3/8"-24 3/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00039 3/8"-24 1" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00104 3/8"-24 1" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0984FA00027 3/8"-24 1 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" 18-8 Stainless Steel Coupling, Hex
0986FA00005 3/8"-24 1 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" 316 Stainless Steel Coupling, Hex
0989FA00021 3/8"-24 1 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" Brass Coupling, Hex
0976FA00004 3/8"-24 1 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0994FA00007 3/8"-24 1 1/8" Fully Threaded UNF Class 2B Right Hand External Hex 9/16" Zinc-Plated Steel Coupling, Hex
0991FA00106 3/8"-24 1 1/4" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0991FA00108 3/8"-24 1 1/2" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0976FA00039 3/8"-24 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 9/16" Zinc-Plated Steel Coupling, Hex
0989FA00022 3/8"-24 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" Brass Coupling, Hex
0979FA00012 3/8"-24 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0981FA00005 3/8"-24 1 3/4" Fully Threaded UNF Class 2B Right Hand External Hex 5/8" Zinc-Plated Steel Coupling, Hex
0991FA00044 3/8"-24 2" Fully Threaded UNF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00110 3/8"-24 2" Fully Threaded UNF Class 2B Right Hand - - Black-Oxide Steel Coupling
0992FA00022 3/8"-24 4" Partially Threaded UNF Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0992FA00023 3/8"-24 6" Partially Threaded UNF Class 2B Right Hand External Hex 5/8" 18-8 Stainless Steel Coupling, Hex
0991FA00040 3/8"-32 1" Fully Threaded UNEF Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0990FA00003 4-40 3/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/4" Nylon 6/6 Plastic Coupling, Hex
0984FA00020 4-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" 18-8 Stainless Steel Coupling, Hex
0986FA00016 4-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" 316 Stainless Steel Coupling, Hex
0988FA00002 4-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" 6061 Aluminum Coupling, Hex
0989FA00001 4-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Brass Coupling, Hex
0976FA00029 4-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Zinc-Plated Steel Coupling, Hex
0992FA00001 4-40 1" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" 18-8 Stainless Steel Coupling, Hex
0984FA00021 5-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" 18-8 Stainless Steel Coupling, Hex
0989FA00017 5-40 7/16" Fully Threaded UNC Class 2B Right Hand External Hex 5/16" Brass Coupling, Hex
0991FA00027 5/16"-18 3/4" Fully Threaded UNC Class 2B Right Hand - - 18-8 Stainless Steel Coupling
0991FA00069 5/16"-18 3/4" Fully Threaded UNC Class 2B Right Hand - - 316 Stainless Steel Coupling
0991FA00093 5/16"-18 3/4" Fully Threaded UNC Class 2B Right Hand - - Black-Oxide Steel Coupling
0989FA00007 5/16"-18 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Brass Coupling, Hex
0976FA00036 5/16"-18 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0981FA00002 5/16"-18 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0976FA00049 5/16"-18 7/8" Fully Threaded UNC Class 2B Right Hand External Hex 9/16" Black-Oxide Steel Coupling, Hex
0994FA00006 5/16"-18 15/16" Fully Threaded UNC Class 2B Right Hand External Hex 1/2" Zinc-Plated Steel Coupling, Hex
0984FA00004 5/16"-18 1" Fully Threaded UNC Class 2B Right Hand External Hex 7/16" 18-8 Stainless Steel Coupling, Hex
🔍 ✕
Cancel