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  • Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut
  • Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut
  • Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut
  • Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut
  • Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut
  • Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut
Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut

Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut

  • 10 - 99 Pieces
    $0.10
  • 100 - 999 Pieces
    $0.06
  • 1000 - 9999 Pieces
    $0.03
  • >= 10000 Pieces
    $0.01

Customization:

Customized logo（Min.Order: 5 pieces）
Customized packaging（Min.Order: 5 pieces）
Graphic customization（Min.Order: 5 pieces）
View product details

Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Secure Mounting Solutions: Designed to connect and anchor steel tubes (round/square) via threaded inserts, enabling stable assembly in industrial and mechanical systems.
  • Versatile Thread Compatibility: Supports M2 to M16 thread sizes (metric/imperial), accommodating diverse pipe diameters and hardware requirements.

Key features

  • 1. Corrosion-Resistant Material Technology

    • With corrosion-resistant finishes like anodized aluminum and passivated stainless steel, you can ensure long-lasting durability in harsh industrial environments. ~30% longer lifespan than uncoated metal alternatives*.

  • 2. Customizable Threaded Design for Precision Mounting

    • With adaptable threaded inserts and support for both metric (e.g., M4, M8) and imperial systems, you can achieve precise positioning for diverse mounting needs. Compatible with over 20 thread sizes compared to competitors’ limited ranges*.

  • 3. Broad Compatibility with Industrial Applications

    • With compatibility across M1.6 to M16 thread sizes, you can suit a wide range of steel tube diameters. Ideal for heavy-duty scenarios like machinery assembly or structural reinforcement, outperforming standard nuts in load-bearing capacity*.

  • 4. Secure Mounting Solutions for Commercial Use

    • Designed for industrial stability, the square shape and reinforced ridges ensure secure fastening in continuous-use environments. Reduces slippage and loosening compared to round nuts in vibration-heavy settings*.

  • 5. Compliance with Industrial Safety Standards

    • Constructed from certified materials like stainless steel and zinc-flake-coated steel, these inserts meet stringent industrial safety and durability standards (e.g., ISO, ASTM). Suitable for regulated sectors like construction and manufacturing*.

Product details

Factory Direct M4 M6 M8 Pipe Connector Square Threaded Inserts Nut for Round Square Steel Tubes End Star Nut

The Factory Direct M4/M6/M8 Pipe Connector Square Threaded Inserts are industrial-grade mounting components designed for secure fastening in steel tube applications. Crafted from materials like aluminum, steel, and stainless steel, these square components feature precision-machined threads and customizable surface treatments. Their unique square shape with cutouts reduces weight while maintaining structural integrity, while ridges enhance grip and stability during installation.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialAluminum, Steel, Stainless Steel, Brass, Plastic, NylonLightweight assemblies (aluminum), corrosive environments (stainless steel)
Thread SizeM2.2 to M16 (including M4/M6/M8 as standard variants)Custom-fit for round/square tube connections
Surface TreatmentAnodized, Polished, Black Oxide, Zinc-Flake Coated, Chrome PlatedCorrosion resistance (zinc-flake), aesthetic finishes (chrome)
Design FeaturesSquare profile with ventilation cutouts and structural ridgesWeight reduction in machinery, secure mounting in tight spaces
Measurement SystemImperial & MetricGlobal compatibility for industrial projects

Customization guide

Adjustable parameters include:

  • Material selection (e.g., stainless steel for marine use, nylon for low-friction applications)
  • Thread size customization (from M2.2 to M16)
  • Surface treatment upgrades (e.g., zinc-flake coating for extreme corrosion resistance)

Get inspired

With the square profile and ventilation cutouts, these inserts reduce material waste while maintaining strength. Pair them with threaded bolts to create adjustable mounting solutions for machinery, outdoor structures, or automotive components.

Choose your model

ParameterBase Model (Steel)Advanced Model (Stainless Steel)Pro Model (Zinc-Flake Coated Steel)
Corrosion Resistance500 hours salt spray+100% (1,000 hours)+200% (2,000 hours)*
Load Capacity1,500 N2,000 N2,500 N
Surface FinishBlack OxidePassivatedZinc-Flake Coated

Supplier's note

  1. Triple Corrosion Resistance: The Pro Model’s zinc-flake coating outperforms industry benchmarks by 200%, enabling use in offshore or chemical processing environments.
  2. Universal Thread Compatibility: The 20+ thread sizes (including M4/M6/M8) simplify retrofitting existing systems without redesign.
  3. Lightweight Design: Aluminum variants reduce component weight by 40% compared to steel, ideal for aerospace or robotics applications.

Version Selection Guide:

  • Base Model: Suitable for general industrial use (e.g., workshop machinery).
  • Advanced Model: Preferred for food processing or coastal regions (stainless steel’s hygiene and corrosion benefits).
  • Pro Model: Required for oil rigs or chemical plants where extreme durability and longevity are critical.

*Tested per ASTM B117 salt spray standard.

Frequently asked questions

  • Which Factory Direct M4/M6/M8 Threaded Insert Nut suits round steel tubes for industrial mounting?

  • How do I choose between aluminum and stainless steel threaded inserts for outdoor applications?

  • Can these square threaded inserts be customized for non-standard thread sizes (e.g., M5.5 or M14)?

  • What maintenance is required for threaded inserts with black oxide coating?

  • Are these threaded inserts compliant with industrial safety standards?

  • Which surface treatment is best for high-temperature environments (e.g., machinery)?

  • Can I use these square inserts for vertical pipe mounting?

  • What’s the advantage of nylon threaded inserts over metal for plastic tubes?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Aluminum NutsLightweight machinery, automotive partsAnodized finish (MIL-A-8625 Type II) ▲
(Industry standard: Type II)
Thread size M4-M8 (ISO 261)		Lightweight (▲), corrosion resistance vs steel
Cost-effective for non-heavy loads		Lower load capacity (▲)
Not suited for high-stress environments
Stainless Steel NutsCorrosive environments, marine equipment316-grade stainless (ASTM A182)
Passivated (ASTM A967) ▲▲
(Advanced: Electropolished, ASTM B912)		Superior corrosion resistance (▲▲)
High durability in harsh conditions		Higher cost (▲)
Magnetic susceptibility in some grades
Steel NutsGeneral industrial applicationsGalvanized finish (ASTM A153) ▲
(Industry standard)
Thread size M4-M8 (ISO 261)		High strength (▲)
Cost-effective for standard use		Prone to rust without coating (▲)
Heavier than aluminum
Plastic NutsElectronics, low-load applicationsNylon 6/6 (ASTM D638)
UV-resistant (ASTM D4329) ▲
(Advanced: 30% GF nylon)		Non-conductive (▲)
Chemical resistance (▲)
Lightweight (▲)		Lower temperature tolerance (▲)
Weaker mechanical strength (▲)
Brass NutsElectrical grounding, decorative usesBrass 260 (ASTM B13)
Chrome-plated (ASTM B201) ▲
(Advanced: Gold-plated)		Good electrical conductivity (▲)
Aesthetically pleasing (▲)		Higher cost (▲)
Less durable in extreme env (▲)
Nylon NutsAutomotive, vibration-prone areasGlass-filled nylon (30% GF, ASTM D638) ▲
(Industry standard: 20% GF)
Thread tolerance ISO 965-1		Vibration-resistant (▲▲)
Self-lubricating (▲)
Reduces thread wear		Brittle at low temps (▲)
Limited load capacity (▲)

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