Name: DIN 6334 Hex Coupling Nuts
Availability: InStock
Rating: 4.5 (89 reviews)

DIN 6334 Hex Coupling Nuts

Our DIN 6334 Hex Coupling Nuts are precision-engineered, high-strength fasteners designed to securely join two externally threaded rods or bolts end-to-end. Characterized by their extended length and full, uninterrupted internal threading, these coupling nuts provide a robust and reliable connection point for a wide range of mechanical assembly, construction, and repair applications. Manufactured in strict compliance with DIN 6334 standards, they guarantee consistent dimensions, thread accuracy, and mechanical performance for dependable results in professional and industrial settings.

Description

Product Details

Name	Thick Hex Nuts	Materials	Carbon Steel/Stainless Steel
Standards	DIN6334	Strength level	4 8 10 12 A2-70 A4-70 A4-80
Size	M6-M36	Surface finish	ZP\HDG\BLACK\Dacromet etc.
Length	/	Samples	Available

Product Parameters

Screw Thread		M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36
d		M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36
P	Pitch	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	3.5	4
s		10	13	17	19	22	24	27	30	32	36	41	46	50	55
L		18	24	30	36	42	48	54	60	66	72	81	90	99	108
e		11.05	14.38	18.9	21.1	24.49	26.75	29.56	33.53	35.03	39.98	45.2	50.85	55.37	60.79
per 1000 units ≈ kg		7	18	42	63	95.5	122	140	240	300	412	608	825	1100	1470

Key Features & Benefits

Extended Grip Length: The elongated hexagonal body provides a deep, secure engagement with both mating threads, distributing load over a greater area and significantly increasing connection strength and stability compared to standard nuts or short couplings.

Full Internal Threading: Precision-cut threads run the entire length of the nut, allowing for maximum flexibility in joining threaded rods of various lengths and ensuring a uniform, strong connection.

High-Strength Material: Manufactured from graded steel (typically Grade 8 or equivalent), our coupling nuts offer excellent tensile strength and durability, making them suitable for structural and load-bearing applications.

Versatile Joining Function: The primary solution for linearly extending threaded rods, creating adjustable tie rods, repairing broken studs, or providing a solid threaded junction in frameworks, piping, and machinery.

Easy Installation & Adjustment: The standard hex design allows for easy installation and tightening using common wrenches or sockets. The extended length also facilitates fine adjustments in the overall assembly length.

Corrosion Protection Options: Available with various finishes including Zinc Plated, Hot-Dipped Galvanized, and Geomet® coating to provide resistance against rust and corrosion in different environmental conditions.

Intended Applications

DIN 6334 Coupling Nuts are indispensable in scenarios requiring a strong, elongated threaded connection:

Construction & Steelwork: Extending threaded bar in concrete formwork, post-tensioning systems, and structural tie assemblies.

Machinery & Equipment: Joining lead screws, actuator rods, and creating adjustable linkages in mechanical systems.

Piping & HVAC: Assembling long threaded rods for pipe hangers, seismic bracing, and duct support systems.

Automotive & Repair: Repairing damaged or stripped studs on engines and equipment; creating custom-length fasteners.

General Fabrication: Any project requiring a reliable, high-strength connection between two threaded ends.

Installation Guidelines

1.Ensure Compatibility: Verify that the thread pitch (M) and diameter of both rods/bolts match the coupling nut.

2.Prepare Threads: Clean the threads on both rods to be joined of any dirt, debris, or damage.

3.Screw In: Thread the first rod into one end of the coupling nut until it is firmly engaged. Then, screw the second rod into the opposite end.

4.Tighten: Using two wrenches (one to hold the nut, one to turn the second rod if needed), tighten the assembly until the connection is secure and the desired overall length is achieved. For critical applications, consult torque specifications.

Why Choose Our DIN 6334 Coupling Nuts?

Certified Quality: Our nuts are produced to meet strict international quality standards, with material certifications and traceability available upon request.

Engineering Support: Our technical team can assist with load calculations, material selection, and application-specific recommendations.

Competitive Pricing & Inventory: We offer direct manufacturer pricing and maintain a substantial stock for reliable, timely delivery on both standard and project-based orders.

Customization Options: We can provide custom sizes, special coatings, and unique packaging to meet your exact project specifications.

About Us

SEVEN REASONS WHY SHOULD YOU CHOOSE HAOSHENG FASTENER

1.Focus on Fasteners

Deeply cultivating the fastener industry for 30 years, serving a total of 10000+ customers

2.Scale and Strength

The factory covers an area of 20000 square meters and has an annual output exceeding 60000 tons

3.Honor and Qualifications

We own ISO9001 ISO14001 and ISO45001 three major System Certifications and are High-tech Enterprise in Hebei Province

4.Internationalization

We have exported to 38 countries and regions and our duty for the EU anti-dumping is 39.6%.

5.Free Sample

We accept free samples for your convenience to inspect if our quality meet your needs.

6.Spot Goods

The inventory of hot selling products reaches up to 2000 tons, meeting the needs of different customers.

7.Source factory

We support customization and have a wide range of fastener products. The price is competitive and there are no intermediaries.

Certificate

Production Process

Customers

FAQ

Q1: Are you manufacturer or trading company?

A1: We are professional manufacturer with 30 years experience. We accept OEM, ODM as your needs and assure the competitive price and quality for you.

Q2: Can you offer me sample?

A2: Yes, we can offer you sample to test and check quality.

Q3: How does your factory do regarding quality control?

A3: We have professional QC team to inspect each items from the links of production to package.

Q4: How about your delivery time?

A4: Normally it will take 30-35 days after receiving your deposit.

Q5: What is your terms of payment?

A5: T/T 30% as deposit, and 70% balance before delivery.

Q6: What advantages we have?

A6 1.Strict QC: For each order, strict inspection will be carried out by the QC department before shipping. The bad quality will be avoid within door.

2.Shipping: We have shipping department and forwarder, so we can promise faster delivery and make the goods well protected.

3.Our factory professional production metal box drawer system ,hinge，concealed drawer slides ,ball bearing slides , etc furniture fittings.

Download

Related Products

DIN 6921 / ISO 1665 Hex Flange Bolts

Hexagon flange head screws conforming to DIN 6921 and ISO 1665 standards, featuring either smooth or serrated bearing surfaces, represent highly adaptable and dependable fastening solutions. Engineered for optimal clamping performance and uniform pressure distribution, these fasteners significantly reduce the potential for surface damage to assembled materials.

ISO 4032 Hexagon Nuts

Our ISO 4032 Hexagon Nuts represent the definitive international standard for general-purpose metric fastening. As the most widely recognized and specified hex nut worldwide, they are engineered to deliver reliable, high-strength performance across an unparalleled range of industrial, commercial, and consumer applications. Manufactured in strict compliance with ISO 4032 dimensional standards and ISO 898-2 mechanical property standards, these nuts guarantee consistent quality, perfect thread fit, and assured compatibility with ISO-metric bolts and threaded components. They are the fundamental, trusted choice for designers, engineers, and manufacturers who require uncompromising quality in their assemblies.

DIN 935 Hex Castle Nuts

Our DIN 935 Hex Castle Nuts (also known as Hex Slotted Nuts) are precision-engineered, single-piece fasteners designed for secure, vibration-resistant connections where reliable mechanical locking is essential. Featuring a standard hexagonal body with a cylindrical upper section containing precisely machined slots, these nuts are engineered to work in conjunction with cotter pins or wire to create a permanent, fail-safe lock. Manufactured in strict compliance with DIN 935 standards, they offer consistent quality and reliability for mechanical, automotive, and industrial applications where safety is paramount.

Color Zinc Coated DIN 125 Flat Washers

Our Color Zinc Coated DIN 125 Flat Washers are precision-engineered components designed to provide reliable load distribution, surface protection, and vibration absorption in bolted assemblies. Manufactured in strict accordance with the German DIN 125 standard, these washers feature a distinctive colored zinc finish that combines the dimensional accuracy and strength of a standard flat washer with enhanced corrosion resistance and visual appeal. The vibrant color coating not only protects against rust but also allows for easy identification, quality control, and aesthetic matching in visible applications. Ideal for general engineering, automotive, construction, and assembly applications where both performance and appearance matter.

Wedge Anchors

Our Wedge Anchors represent the industry standard for high-strength, permanent fastening in solid concrete. Designed for critical structural and seismic applications, these anchors provide unparalleled shear and tensile strength by creating a powerful mechanical lock within the base material. Engineered for reliability and performance, they are the preferred choice for construction professionals, engineers, and contractors who demand absolute confidence in their fastening systems.

DIN 934 Hexagon Nuts

Our DIN 934 Hexagon Nuts are the cornerstone of mechanical assembly across European engineering and industrial sectors. As the most recognized and specified standard for metric hex nuts in Europe, this product offers robust, dependable performance for a vast array of applications. Manufactured in strict accordance with the German DIN 934 standard, these nuts guarantee precise dimensional accuracy, consistent mechanical properties, and perfect compatibility with a wide range of metric bolts and threaded rods. They are the default choice for engineers, manufacturers, and maintenance professionals who prioritize proven reliability and interchangeability.

ISO 4035 Hexagon Thin Nuts

Our ISO 4035 Hexagon Thin Nuts are precision-engineered, low-height fasteners designed for applications where space is at a premium and a standard nut profile is unsuitable. As part of the globally recognized ISO metric fastener system, these nuts offer dimensional interchangeability and reliable performance worldwide. With a height significantly less than a standard hex nut, they provide an ideal solution for use as lock nuts (jam nuts), thread protectors, spacers, or in assemblies with strict axial clearance constraints. Manufactured to exact ISO 4035 specifications, they ensure consistent quality, fit, and function in any metric-based design.

DIN 439 Hex Thin Nuts

Our DIN 439 Hex Thin Nuts (also known as Hex Slotted Nuts or Low-Height Nuts) are engineered for applications where space is constrained and a standard nut profile is unsuitable. Manufactured to the exacting specifications of the German DIN 439 standard, these nuts provide a reliable and secure fastening point with a significantly reduced height. Their precise, low-profile design makes them the ideal choice for locking mechanisms, thread protection, and assemblies with limited clearance, without compromising on the strength and wrenchability inherent in the hexagonal form.