DIN6334 coupling Nut Long nuts connecting nut Ellongated Hexagon Coupling Nuts height M6-M36 Zinc/D.H.G YZP BLACK

Specification

A coupling nut, also known as extension nut, is a threaded fastener for joining two male threads, most commonly a threaded rod, but also pipes. The outside of the fastener is usually a hex so a wrench can hold it. Variations include reducing coupling nuts, for joining two different size threads; sight hole coupling nuts, which have a sight hole for observing the amount of engagement; and coupling nuts with left-handed threads. These are used to make up long rod assemblies from shorter lengths of rods. The rods are threaded into the coupling nut for a certain distance. Coupling nut dimensions are described by the Industrial Fasteners Institute in standard IFI-128. It is given a plain finish. It is either cold drawn or hot rolled depending on the bar stock used. Coupling nuts threaded with two different thread sizes and profiles are called reducing coupling nuts.

Coupling nuts can be used to tighten a rod assembly inward or to press a rod assembly outward

Metric DIN 6334 Hexagon Coupling Nuts also known as extension nuts are elongated fully threaded hex nuts that often used to join two externally threaded fasteners usually threaded rods. DIN 6334 metric hex nuts have a height of 3 x the major diameter of the thread.

Metric DIN 6334 Ellongated Hexagon Coupling Nuts height 3 x Dia

Equivalent norms: CSN 021604;

Legend:

l - length of nut
s - size of the hexagon
d - the nominal diameter of the thread

Makings:

Steel: 6, 8, 10
Stainless: A2,A4
Plastic: -
Non Ferrous: -
Thread: 6H

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ tapping ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ tapping ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Product Grade

Class 5 Class 6 Class 8 Class 10

Materials and Chemical compstition

1008

1035

10B21

1045

40CR

35CRMO

42CRMO

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

MECHANICAL PROPERTY

TESTING STANDARD:DIN267- 4 OR ISO898-2

The advantages of QBH

• QBH brand sales to the main quality assurance.
• Years of export trade management, excellent service, word-of-mouth guarantee.
• By working with TUV,escort for quality.
• Customization of non-standard parts can be made according to customer's requirements and drawings.
• For quality customers,we can provide a certain credit period.
  

Product application

Often referred to as extension nuts, use these to connect and extend threaded rods. They're about half the strength of medium-strength steel coupling nuts for use in light duty fastening applications.

DIN 6334 Alias

• French (fr): DIN 6334 Écrous hexagonaux – 3D
• German (de): DIN 6334 Sechskantmuttern, 3d hoch
• Italian (it): DIN 6334 Dadi esagonali di prolunga m 3 x d
• Dutch (nl): DIN 6334 Hexagon Noten – 3D
• Czech (cs): DIN 6334 Prodlužovací matice 3D

Metric Medium-Strength Steel Coupling Nuts—Class 8

Often referred to as extension nuts, use these to connect and extend threaded rods. They're comparable in strength to Class 8.8 bolts.

Zinc-plated steel coupling nuts resist corrosion in wet environments.

Black-oxide steel coupling nuts have a dark surface color and are mildly corrosion resistant in dry environments.

Metric High-Strength Steel Coupling Nuts—Class 10

Often referred to as extension nuts, use these to connect and extend threaded rods. Made from Class 10 steel, they're about 25% stronger than medium-strength steel coupling nuts and comparable in strength to Class 10.9 bolts. A zinc plating provides corrosion resistance in wet environments.

Metric Super-Corrosion-Resistant 304 and 316 Stainless Steel Coupling Nuts

Made from 304 and 316 stainless steel, these coupling have excellent resistance to chemicals and salt water. Also known as extension nuts, use them to connect and extend threaded rods. They may be mildly magnetic.