Ever found yourself overwhelmed by the sheer number of coupling nut manufacturers in the USA? With so many choices, selecting the right supplier can feel like finding a needle in a haystack. The quality and reliability of your fasteners make a huge difference—whether you’re handling major construction projects or precision assemblies. Choosing a top-tier factory not only ensures consistent quality but also saves time, money, and avoids costly setbacks.

Ready to discover the leading coupling nut manufacturers and factories that stand out from the crowd? Read on to make your next sourcing decision a breeze!

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Coupling Nut Supply

Product Details:
Coupling Nut Supply manufactures standard rod coupling nuts, specialty fasteners, reducer coupling nuts, and custom machined products, specializing in custom sizes for construction and other applications.

Technical Parameters:
– Custom sizes from #4-40 up to 12 inches in diameter, and up to 14 inches in
– Standard and specialty fasteners available
– Precision machining with streamlined production process

Application Scenarios:
– Construction industry fastening applications
– Specialty applications requiring custom or non-standard fastener sizes
– Situations demanding quick or same-day shipment for stocked items

Pros:
– Wide range of custom and standard sizes available
– Fast turnaround: custom specials in one week or less, same-day shipping for
– Multiple stocking warehouses for efficient distribution
– Precision machining ensures consistent and high-quality products

Cons:
– Custom products may depend on material availability
– Limited technical specifications detailed on the website

21 Coupling Nut Manufacturers in 2025 – Metoree

Coupling Nuts, Hex or Heavy Hex – Haydon Bolts

Product Details:
The company offers coupling nuts, which are internally threaded fasteners used to join two pieces of threaded rod or other male-threaded fasteners. Coupling nuts are available in various diameters and finishes, and are used to extend the length of threaded rods or join rods together.

Technical Parameters:
– Available diameters: 1/4” – 4” (including most diameters in between)
– Lengths: standard hex coupling nuts and extra-long (heavy pattern) coupling
– Threads: national coarse (UNC), national fine (UNF), and 8TPI available; right
– Finishes: plain, hot-dip galvanized, and zinc-plated

Application Scenarios:
– Connecting or extending threaded rods in construction projects
– Used in structural steel connections
– Industrial machinery assembly requiring long threaded connections

Pros:
– Wide variety of sizes, thread pitches, and finishes offered
– Can be supplied as domestic or imported per customer specifications
– Ability to provide both right-hand and left-hand threads

Cons:
– Non-stocked (custom) sizes and finishes may require longer lead times
– Limited availability of extra-long coupling nuts in larger diameters

Manufacturer of OEM Specialty Nuts & Parts | Wyandotte Industries, Inc.

Product Details:
Wyandotte Industries manufactures OEM specialty nuts, locknuts, nylon insert locknuts, screw machine products, and CNC machined parts such as bushings, collars, fittings, inserts, spacers, threaded spacers, knurled parts, machined washers, pins, and vents. They produce custom items to print, including slotted nuts, castle nuts, coupling nuts, jam nuts, panel nuts, and all metal or nylon insert locknuts in various steel grades.

Technical Parameters:
– Produces nylon insert locknuts in low carbon, medium carbon, and heat treatable
– Specializes in bushings, collars, fittings, inserts, spacers, threaded spacers,
– CNC machining capabilities include both CNC turning and milling
– Custom per print manufacturing for special threads and dimensions

Application Scenarios:
– Hydraulic cylinder industry (custom carbon nylon insert steel lock nut)
– Agriculture industry (custom steel spacers)
– Automotive industry (custom carbon steel castle nut)
– Trucking industry (custom carbon steel shear nut)

Pros:
– Extensive range of special fasteners and precision machined components
– Custom manufacturing capabilities to meet customer prints and specifications
– IATF 16949, AS9100 Rev D, ISO 9001:2015, and NADCAP Non-Destructive Testing
– Supplies multiple industries (hydraulic, agriculture, automotive, trucking),

Cons:
– No specific mention of maximum size, tolerance, or volume capabilities
– Lack of detailed technical specifications (dimensions, finishes) directly on

Coupling Nuts Suppliers – Thomasnet

Product Details:
Coupling nuts available from manufacturers and suppliers in the USA and Canada. Related categories include metal nuts, steel nuts, metric nuts, special nuts, aluminum nuts, and square nuts. Products are supplied by a diverse range of company types, including distributors, custom manufacturers, manufacturers, finishing service companies, turnkey system integrators, and more.

Technical Parameters:
– Products offered with various quality certifications, e.g., AS9100, ISO 9001,
– Available with origin declaration and compliance (Berry Amendment, Buy American
– Diverse supplier ownership (Minority Owned, Woman Owned, Veteran Owned, Small
– Supplier services include instant quote, product catalogs, CAD models, and

Application Scenarios:
– Used in industries complying with strict quality and origin declarations
– Suitable for supply chains requiring certified, domestically produced components
– Utilized by manufacturers, OEMs, and system integrators in North America

Pros:
– Wide supplier choice with over 300 coupling nut sources in USA and Canada
– Extensive quality certification and compliance options
– Diverse supplier base for meeting specific ownership or sourcing needs
– Ability to filter suppliers by location, company type, certification, and

Cons:
– Product-specific technical specifications (material, size, finish) are not
– Requires registration to access full supplier and product details

Custom Fasteners Manufacturer | National Bolt and Nut Corp.

Product Details:
National Bolt & Nut Corporation manufactures high-quality, custom fasteners including bolts, nuts, washers, screws, and screw machine products. They offer both standard and metric sizes, custom non-standard sizing, a variety of materials and finishes, and provide 24-hour emergency turnaround for many products.

Technical Parameters:
– Fastener types: anchor, bent, carriage, elevator, lag, flange, plow, socket, 12
– Materials available: steel, stainless steel, brass, nylon, Monel, Hastelloy,
– Finishes: zinc, galvanized, black oxide, hot dipped galvanized.
– Production processes: milling, drilling, tapping, flattening, turning, slotting

Application Scenarios:
– Construction: structural washers and bolts for steel structures, wood screws
– Mining: custom bolts and fasteners designed for harsh environments and heavy
– Transportation: fasteners for railroad, tractor-trailers, aircraft, and
– Agricultural and Petrochemical industries: fasteners for farming equipment,

Pros:
– ISO certified, nationwide manufacturer with unmatched selection and custom
– Capability to provide custom sizes, materials, and special finishes tailored to
– Rapid 24-hour emergency turnaround and immediate delivery on thousands of
– In-house A2LA-accredited quality control, offering documentation and

Cons:
– No specific pricing details provided on the page.
– Limited information on minimum order quantities and international shipping.
– Custom orders may require additional consultation for highly specialized

Coupling Nuts | BACO Enterprises Inc

Product Details:
Coupling nuts (also called extension nuts) are long, hexagonal threaded fasteners used to join two heavy threaded rods of the same diameter. Variants include standard hex coupling nuts, reducing coupling nuts (with two different thread sizes), rod coupler nuts, and types made from 304 or 316 stainless steel. Available finishes include plain, hot dip galvanized (HDG), stainless steel, and zinc.

Technical Parameters:
– Material options: ASTM A194 GR. 2H, ASTM A563 GR. A, GR.5, type 304, type 316
– Available thread sizes: e.g., 8 UNC (1″), 7 UNC (1 1/4″), 4.5 UNC (2 1/4″), 10
– Finishes: plain, hot dipped galvanized (HDG), stainless steel, zinc
– Manufacturing methods: cold drawn or hot-rolled bar stock

Application Scenarios:
– Connecting two threaded rods in construction applications
– Acting as a critical anchor in structural assemblies
– Used where versatile connecting hardware is needed for mechanical threading

Pros:
– Wide selection of thread sizes, diameters, materials, and finishes
– Products meet recognized standards (ASTM, type 304/316) for quality and
– Fast order fulfillment, with 24-hour shipping available in the Northeast and
– Competitive pricing and in-house testing/inspection for quality assurance

Cons:
– Geographically quick shipping is primarily limited to Northeastern and
– No information provided about pricing, minimum quantities, or lead time for

Galvanized Coupling Nuts Manufacturer – KD Fasteners

Product Details:
Coupling nuts are a type of fastener used to join two male threads, most commonly threaded rods or pipes, to allow for extended length or secure connections. The company offers coupling nuts in various sizes, thread pitches, materials, and finishes for industrial use.

Technical Parameters:
– Available in various thread sizes (metric and inch)
– Different lengths and diameters to accommodate multiple applications
– Offered in materials such as steel, stainless steel, and brass
– Surface finishes include zinc plating, plain, and others

Application Scenarios:
– Joining threaded rods for structural or construction projects
– Extending threaded assemblies in machinery and equipment
– Plumbing and pipe installations
– General fastening in industrial and commercial applications

Pros:
– Versatile solution for joining or extending threaded components
– Offered in multiple sizes and materials to suit diverse needs
– Corrosion-resistant options available with suitable finishes

Cons:
– Strength and durability limited by material and thread quality
– May not be suitable for high-vibration or critical load applications

Coupling Nuts, Rod Coupling Nuts, Extension Nuts Manufacturer USA

Product Details:
Norwood Screw Machine manufactures coupling nuts designed to connect two pieces of threaded rod or other male threaded fasteners, extending their length. They offer standard and custom coupling nuts to meet specific requirements.

Technical Parameters:
– Materials: Multiple metals including steel and stainless steel
– Sizes: Available in various standard and custom sizes
– Thread types: Standard and custom thread configurations offered
– Finishes: Multiple finish options for corrosion resistance

Application Scenarios:
– Joining two sections of threaded rod
– Extending the length of rods in construction assemblies
– Machinery repair where threaded extensions are needed
– Electrical and plumbing installations

Pros:
– Custom manufacturing capabilities for special sizes and threads
– Wide range of material and finish options
– High quality for demanding industrial applications
– Responsive to customer specifications and requirements

Cons:
– May require minimum order quantities for custom products
– Lead times may be longer for customized items

Standard Coupling Nuts | Coupling Nut Supply – cnssales.com

Product Details:
The company offers a variety of nuts including sleeve nuts, coupling nuts, square nuts, cap nuts, heavy hex nuts, and acorn nuts, available in both specialty and standard forms. These nuts are offered in multiple sizes, grades, materials, and finishes.

Technical Parameters:
– Thread sizes range from 10/32 to 5-4 internal thread
– Length ranges from 1″ to 14″
– Available grades: 2, 5, 8
– Materials: stainless steel, steel, brass, aluminum; Finishes: plain, plated,

Application Scenarios:
– Attaching machine thread fasteners
– Coupling two pieces of threaded rods
– Coupling tie rods with limited length adjustment
– Where visual confirmation of thread engagement is required (with sight hole

Pros:
– Wide range of sizes, materials, finishes, and grades
– Specialty and standard options available
– Ability to oversize thread for galvanized applications
– Certified material available on request

Cons:
– Specific limitations regarding load ratings or customization not detailed
– Length adjustment with sleeve nuts is limited

Comparison Table

Company	Product Details	Pros	Cons	Website
Coupling Nut Supply	Coupling Nut Supply manufactures standard rod coupling nuts, specialty	Wide range of custom and standard sizes available Fast turnaround: custom	Custom products may depend on material availability Limited technical	www.cns-sales.com
21 Coupling Nut Manufacturers in 2025 – Metoree				us.metoree.com
Coupling Nuts, Hex or Heavy Hex – Haydon Bolts	The company offers coupling nuts, which are internally threaded fasteners used	Wide variety of sizes, thread pitches, and finishes offered Can be supplied as	Non-stocked (custom) sizes and finishes may require longer lead times Limited	haydonbolts.com
Manufacturer of OEM Specialty Nuts & Parts	Wyandotte Industries, Inc.	Wyandotte Industries manufactures OEM specialty nuts, locknuts, nylon insert	Extensive range of special fasteners and precision machined components Custom	No specific mention of maximum size, tolerance, or volume capabilities Lack of
Coupling Nuts Suppliers – Thomasnet	Coupling nuts available from manufacturers and suppliers in the USA and Canada.	Wide supplier choice with over 300 coupling nut sources in USA and	Product-specific technical specifications (material, size, finish) are not	www.thomasnet.com
Custom Fasteners Manufacturer	National Bolt and Nut Corp.	National Bolt & Nut Corporation manufactures high-quality, custom fasteners	ISO certified, nationwide manufacturer with unmatched selection and custom	No specific pricing details provided on the page. Limited information on
Coupling Nuts	BACO Enterprises Inc	Coupling nuts (also called extension nuts) are long, hexagonal threaded	Wide selection of thread sizes, diameters, materials, and finishes Products	Geographically quick shipping is primarily limited to Northeastern and
Galvanized Coupling Nuts Manufacturer – KD Fasteners	Coupling nuts are a type of fastener used to join two male threads, most	Versatile solution for joining or extending threaded components Offered in	Strength and durability limited by material and thread quality May not be	www.kdfasteners.com
Coupling Nuts, Rod Coupling Nuts, Extension Nuts Manufacturer USA	Norwood Screw Machine manufactures coupling nuts designed to connect two pieces	Custom manufacturing capabilities for special sizes and threads Wide range of	May require minimum order quantities for custom products Lead times may be	norwoodscrewmachine.com
Standard Coupling Nuts	Coupling Nut Supply – cnssales.com	The company offers a variety of nuts including sleeve nuts, coupling nuts,	Wide range of sizes, materials, finishes, and grades Specialty and standard	Specific limitations regarding load ratings or customization not detailed Length

Frequently Asked Questions (FAQs)

How can I find reputable coupling nut manufacturers in the USA?
Start by searching online industry directories, such as ThomasNet or MFG. Trade shows and exhibitions related to fasteners or industrial components are also great places to connect with manufacturers. Review company websites, customer testimonials, and ask for references to ensure their credibility.

What certifications should a reliable coupling nut manufacturer have?
Look for ISO 9001 or similar quality management certifications, which indicate that a manufacturer meets international quality standards. Also, consider if they meet any industry-specific certifications relevant to your application, such as ASTM or SAE compliance.

Can I request custom sizes or materials from manufacturers?
Yes, many USA-based coupling nut manufacturers offer custom fabrication services. You can typically request specific dimensions, threading options, or materials such as stainless steel or brass, depending on your project’s requirements. It’s best to discuss your needs upfront with potential suppliers.

What kind of minimum order quantities (MOQs) should I expect?
MOQs can vary significantly between manufacturers. Some specialize in high-volume production and may require larger orders, while others may accommodate smaller runs or prototypes. Always clarify MOQs early in your discussions to ensure they align with your needs.

How do I evaluate the quality of a coupling nut manufacturer’s products?
Ask for samples to inspect material quality and craftsmanship. Check if the manufacturer uses high-grade raw materials and modern machinery. Request test reports, certifications, and learn about their quality control processes to gain confidence in their products.