All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier

M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 Tornillos Stainless Steel Round Long Coupling Nut

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Secure Rod Connection: Stainless steel coupling nuts are designed to join two threaded rods or bars via internal threading on both ends, ensuring a stable and durable connection.
  • Versatile Thread Compatibility: Supports metric thread sizes from M3 to M20, enabling compatibility with a wide range of industrial and household applications.

Key features

  • 1. Corrosion-Resistant Stainless Steel Construction

  • Material Technology

  • 2. Secure Dual-Threaded Design

  • Interactive Design

  • 3. Versatile Metric Thread Compatibility

  • Performance Parameters

  • 4. Harsh-Environment Reliability

  • Scenario Solutions

  • 5. Industry-Standard Quality Assurance

  • Certification Standards

Product details

M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 Tornillos Stainless Steel Round Long Coupling Nut

Stainless steel round long coupling nuts are precision-engineered fasteners designed to securely join threaded rods or bars. Available in metric thread sizes from M3 to M20 and finishes like plain, polished, or natural, these nuts offer corrosion resistance, durability, and adaptability for industrial, automotive, and construction applications.

Technical specifications

FeatureSpecificationBenefit
MaterialStainless Steel / SteelStainless Steel: triple corrosion resistance vs. standard steel; Steel: cost-effective for non-corrosive environments
FinishPlain, Polished, NaturalPolished finish reduces friction and enhances aesthetics; Natural provides a raw, unprocessed surface
Thread SizeM3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20 (Metric)Universal compatibility with standard tools and global applications
Head TypeRoundSecure, low-profile connection without protrusions
Surface TreatmentPolished, PlainPolished surfaces improve longevity in abrasive environments

Customization guide

Adjust thread sizes (M3–M20) or finishes (plain/polished) to meet specific project requirements. For specialized applications, request custom thread pitches or coatings.

Get inspired

With stainless steel’s corrosion resistance, you can ensure long-term durability in marine or industrial settings. The polished finish enables seamless integration into high-end equipment, while the round head design provides stability in tight spaces.

Choose your model

ParameterBase Model (Steel)Advanced Model (Stainless Steel)Pro Model (Stainless Steel + Polished)
MaterialSteelStainless SteelStainless Steel
FinishPlainPlainPolished
Thread RangeM3–M10M3–M16M3–M20
Corrosion ResistanceStandard+50% vs. Base+100% vs. Base
Friction ResistanceModerateImprovedSuperior (+20% smoother than plain)

Supplier's note

  1. Three Breakthroughs:

    • Material Innovation: Stainless Steel versions offer triple the corrosion resistance of steel, enabling safe use in harsh environments.
    • Thread Range Expansion: The Pro Model’s M3–M20 coverage accommodates projects from delicate electronics to heavy machinery.
    • Polished Finish: Reduces friction by 20% compared to plain finishes, extending lifespan in abrasive applications.
  2. Optimal Version Selection:

    • Base Model: Ideal for indoor, non-corrosive environments (e.g., furniture assembly).
    • Advanced Model: Preferred for outdoor or mildly corrosive settings (e.g., automotive brackets).
    • Pro Model: Best for high-stakes applications like offshore equipment or medical devices, where both corrosion resistance and precision are critical.

With the Pro version’s polished stainless steel, you can achieve seamless integration in premium machinery while ensuring zero rust in saltwater exposure. Pair its M20 thread size with heavy-duty rods for structural stability in construction projects.

Frequently asked questions

  • Which stainless steel coupling nut size suits small plumbing projects?

  • How to clean and maintain M8 stainless steel coupling nuts?

  • Stainless Steel vs Regular Steel Coupling Nuts: Which is better for outdoor use?

  • Can M10 stainless steel coupling nuts be customized with different finishes?

  • Are M16 stainless steel coupling nuts ASTM compliant?

  • What thread standards do M3 to M20 stainless steel coupling nuts follow?

  • Which coupling nuts are best for heavy-duty construction joints?

  • Why choose round-head stainless steel coupling nuts for threaded rod connections?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Industry Standard Coupling Nuts (Carbon Steel)General construction, light machineryMaterial: Carbon Steel (ASTM A307)Cost-effective, widely available, compatible with basic toolsProne to rust in corrosive environments (e.g., coastal areas)
Our Base Model (Stainless Steel, Plain Finish)Moderate environments (indoor machinery, HVAC)Material: AISI 304 (Corrosion resistance per ASTM A240), Thread Size: M8-M16▲ Corrosion resistance vs carbon steel, durable, cost-efficient for stainless steelPlain finish may require lubrication for threading (ISO 898-1)
Our Advanced Model (Stainless Steel, Polished Finish)Harsh environments (marine, chemical plants)Material: AISI 316 (ASTM A193 compliant), Thread Size: M10-M20, Finish: Polished▲ Superior corrosion resistance (resists saltwater/chemicals per ISO 9227), smooth surface reduces frictionHigher cost, requires specialized tools for precision assembly
Hex NutsGeneral assembly (cars, furniture)Material: Carbon Steel (Black Oxide finish), Thread Size: M3-M12Easy to tighten with standard wrenches, compact designNot designed for joining two threaded rods (requires bolts/screws)
Lock Nuts (Nylock Insert)Vibratory environments (automotive, machinery)Material: Stainless Steel (AISI 304), Thread Size: M6-M14, Anti-loosening feature▲ Prevents loosening under vibration (per DIN 985), reliable in dynamic systemsSingle-use (cannot be reused after initial tightening)
Threaded RodsStructural support (facades, frameworks)Material: Stainless Steel (AISI 316), Thread Size: M16-M20, Customizable length▲ Versatile for custom lengths (ISO 724), cost-effective for bulk projectsRequires additional fasteners (nuts/bolts) for secure connections

Related searches

The Product Description is generated by third-party, and Alibaba.com is not liable for any risks related to inaccuracies or the infringement of third-party rights.

The information in this Product Description may differ from the details on the product listing page on Alibaba.com. Additionally, the contents may not be updated in real-time with the product listing page on Alibaba.com, and there may be delays in reflecting the most updated information. The description on product listing page takes precedence. You shall not rely on this Product Description in making transaction decisions.

The comparison data is based on manufacturer information and industry standards. Actual results may vary depending on individual use cases. It is advisable to verify details with the supplier for the most accurate information.