The DIN6334 Carbon Steel Long Hex Coupling Nut is a high-performance fastener engineered for joining two threaded rods or bolts end-to-end, creating extended, robust assemblies. Designed with an elongated hexagonal shape and precise internal threads, this coupling nut adheres to strict DIN6334 standards, making it a reliable choice for industrial, construction, and mechanical applications. Crafted from premium carbon steel (with options for alloy steel, stainless steel, or brass), it balances strength and versatility, supporting high torque and long-term structural stability. Whether for extending tie rods, securing machinery components, or reinforcing building structures, this hex coupling nut delivers consistent performance in demanding environments.
The hexagonal exterior of the DIN6334 coupling nut provides an expansive contact surface for wrenches and tools, enabling high torque application. This design ensures tight, slip-resistant fastening, critical for load-bearing and high-stress assemblies.
Unlike specialized fasteners, the hex shape of this coupling nut is compatible with standard wrenches, simplifying both installation and maintenance. No custom tools are required, reducing downtime for projects of all scales.
Precision-engineered internal threads (available in M, UNC, and UNF specifications) ensure optimal contact with threaded rods or bolts. This design minimizes loosening over time, enhancing retention strength and preventing assembly failure.
By connecting two threaded components, the long hex coupling nut transforms short rods/bolts into longer, more robust structures. It adds critical stability to frameworks, towers, and machinery, making it indispensable for large-scale construction and industrial projects.
Parameter | Details |
Standard | DIN6334, ASTM A325, A490, A354 Gr. BC, A307 Gr. B |
Diameter | 1/4"-4" × M4-M100 |
Length | ≤800mm (30") |
Material | Carbon Steel, Alloy Steel, Stainless Steel, Brass |
Grade | ASTM A325, A490, A354 Gr. BC, A307 Gr. B |
Thread Type | M, UNC, UNF |
Finish | Plain, Black Oxide, Zinc Plated (Clear/Blue/Yellow/Black), H.D.G, Nickel, Chrome, PTFE, Dacromet |
Supply Ability | 1000 tons per month |
Ideal for large-scale construction projects, the DIN6334 carbon steel coupling nut secures columns, beams, and bracing systems. It extends threaded rods for structural frameworks in metal buildings, bridges, and industrial facilities.
Used in machinery maintenance and assembly, this coupling nut modifies or repairs existing mechanical components. It is a key fastener for tie rod assemblies, conveyor systems, and manufacturing equipment.
Suitable for harsh outdoor environments, it reinforces towers, poles, and pipelines in oil&gas operations and wind energy facilities. Its corrosion-resistant finishes (e.g., zinc plating, H.D.G) ensure durability in extreme conditions.
In the automotive industry, it joins components and extends threaded connections. For home decor, it supports hanging installations, curtain rods, and custom furniture builds.
Inspect the DIN6334 coupling nut and threaded rods for debris, burrs, or damage—clean components to ensure smooth threading.
Confirm compatibility: Match the nut’s diameter and thread pitch (M/UNC/UNF) with the threaded rods/bolts.
Screw the coupling nut clockwise onto the first threaded rod until fully engaged (ensure no cross-threading).
Align the second rod with the nut’s open end and thread it clockwise until both rods meet securely inside the nut.
Use the nut’s sight hole (if present) to confirm both rods are fully engaged and centered.
Apply torque with a properly sized wrench—tighten firmly but avoid over-tightening (prevents thread stripping or rod damage).
Yes, we are a direct manufacturer with our own international sales department—we produce and sell all products in-house.
Absolutely. Share your specific size, material, finish, or non-standard requirements (drawings/photos/samples are welcome).
We conduct inspections after every production process and 100% final inspection per international standards and customer requirements.
We accept T/T, L/C, West Union, and Paypal. For mass production, 30% deposit is required before production, with 70% balance due against document copies.
Flexible MOQ—customized to your project needs (contact us for specific volume requirements).
Available terms: FOB, CIF, CFR, CNF, EXW, DDU, DDP (we confirm details during quotation).
Standard packaging: 25kg max cartons + wooden pallets.
Custom packaging available per customer request.
Monthly supply capacity of 1000 tons ensures timely delivery for large orders.
With over 10 years of experience in the fastener industry, we specialize in DIN/ASME/ASTM/IFI standards, focusing on North&South American and global markets. Our advantages include:
One-stop shopping for fasteners and hardware.
High-quality materials with test reports provided upon request.
Competitive pricing and on-time delivery.
Free samples for quality verification.
Technical support for installation and customization.
