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Home Nut Coupling Nut DIN6334 Long Hex Coupling Nut
DIN986 Self-Locking Domed Cap Nut
DIN986 Self-Locking Domed Cap Nut
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Round Coupling Nut Connecting Nut
Round Coupling Nut Connecting Nut
DIN6334 Long Hex Coupling Nut
DIN6334 Long Hex Coupling Nut
Steel DIN6334 long hex coupling nuts for mechanical assembly and fastening.
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DIN6334 Long Hex Coupling Nut
DIN6334 Long Hex Coupling Nut
Steel DIN6334 long hex coupling nuts for mechanical assembly and fastening.

DIN6334 Long Hex Coupling Nut

  1. Complies with ISO 8673, DIN 6334, ANSI B18.2.2; bolt extension/docking fasteners
  2. Material: Carbon steel (45#), stainless steel (304/316), alloy steel (42CrMo); strength grades 4.8–12.9
  3. Structure: Long hexagonal body + full-through internal thread (coarse/fine) + end chamfers (for guiding)
  4. Surface treatments: Zinc plating, black oxide, passivation, hot-dip galvanizing
  5. Size M4–M36, length 10–100mm (longer than standard nuts)
Category: Coupling Nut
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  • Description
Description

Core features of Long Hex Coupling Nut

  1. Full-through thread: Connects two bolts to extend length or adjust spacing, achieving integral force transmission
  2. High coaxiality: Long body design ensures alignment of connected bolts, avoiding deflection under load
  3. Hexagonal profile: Fits standard wrenches, easy to tighten and position during assembly
  4. Strong rigidity: Extended body enhances structural stability, suitable for high-precision or heavy-load connections
  5. Wide application: Ideal for machinery, construction, pipelines, and scenarios requiring bolt length extension or docking

Product Parameter (Specification)

StandardDIN,ASTM/ANSI, ISOMaterialCarbon steel, Stainless Steel,Brass,Aluminum
Surface TreatmentZinc Plated, Hop Dip Galvanized(HDG) phosphorization,

Black Oxide,Geomet,Dacroment,Nickel plated,Zinc-Nickel plated

SizeM3-M64
UnitePiece,KGS,TONPackingBulk cartons with pallet, small boxes in cartons with pallet

 

Product Application

DIN6334 long hex coupling nuts are widely used in various machinery, equipment, construction and other fields. In automobile manufacturing, they are used to connect wheels, bodies, engines, and chassis; in the construction field, they are used to connect steel structures and concrete components; in the furniture industry: they are used to fix furniture, doors and windows and other connecting parts; in the fields of railways, aviation and other fields: they are used to fix rails, steel frames and other parts.

 

DIN6334 Long Hex Coupling Nut for Furniture Application Scenario Table

Application FieldSpecific ScenariosStandards & GradesKey Considerations
Industrial EquipmentMechanical shaft couplings, pipe extension joints, conveyor system threaded rod connections, gearbox auxiliary links.DIN 6334; Carbon steel 4.6/8.8 (zinc-plated), Stainless steel A2-70.Long design connects two threaded rods; Double-end thread engagement; Medium-high load-bearing; Anti-loosening.
Construction EngineeringSteel structure auxiliary splicing, scaffolding adjustable pull rods, prefabricated component thread butt joints, guardrail extension fasteners.DIN 6334; Carbon steel 5.6/8.8 (hot-dip galvanized), Stainless steel A4-80.Indoor/outdoor corrosion resistance; Extends component length; Stable for static/dynamic loads.
Light IndustryMetal frame splicing, tool extension rods, storage rack adjustable connectors, sheet metal part butt joints.DIN 6334; Carbon steel 4.6/5.6, Stainless steel A2-70.Cost-effective for mass production; Compatible with standard threaded rods; Easy assembly/disassembly.
DIY & MaintenancePipe repair butt joints, temporary structural connections, handmade project rod extensions, garden tool adjustments.DIN 6334; Carbon steel 4.6 (black oxide), Stainless steel A2-70.User-friendly for non-professionals; Versatile for length adjustment; Durable for daily use

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Round Coupling Nut Connecting Nut

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