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 nuts can be used to tighten a rod assembly inward or to press a rod assembly outward.
Our company plant produce many types and kinds of cold heading hexagon nuts,
internationalstandards:in Germany ,USA,JAPANESE,ENGLAND etc standards.
diameter Size :from M6,M8, to M24,M30......M48.
kinds :of connection hexagon nuts,castle hexagon nuts,flange nuts,nylon insert,electroplate zinc,
colorful zinc plate and blue zinc plate,carbuzing black cafts,Also can do heat dip galvanzing crafts too.
DIN934,DIN935,DIN6330,DIN6334,DIN985,DIN6926.....
hardness grade:Class from class 4.8 ,class6,class 8.class 10,class 12.9;
6.raw material: 45# and 64CrMO carbon steel;also so stainless steel material screw meantime.
producing crafts: colding head and forged for big size with high hardness grade;
Package : plastic woven bags or cartons ,then poly-wooden pallets.
producing drafts: cold heading and forging two crafts .
meantime can accept drawings and sample customeried produce designing works for nuts;
delivery time : 20 dyas for a container
Product Display:
Product Producing
Specifications:
We have many years export srew experience and export to many countries and districts.Delivery
to many ports:Qingdao,Shanghai,Ningbo,TIanjin ports.
We are a global trading company. Our products sell well in Czech, Lithuania, Georgia, Australia, the Middle East, Africa and other regions, countries, and customers in many countries and regions
have formed a trade partnership. The customers who have worked with us agree with our products very much, and agree with our service very much. We also have a professional R & D team.
Welcome the foreign customers and friends enquiry and cooperate to us.
we'll supply the competitive price and best quality nuts in alrge quantity.
Audited Supplier 
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