1.Hex Coupling Nuts Hot Sale with High Quality and Low Factory Price Description:

A coupling nut also known as extension nut is a threaded fastener for joining two male threads, most commonlythreaded rod.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 fastener 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.

2.Main Features of Hex Coupling Nuts：

1.ISO ROHS 
2.Size:M3-M36 
3.surfacet:zp.hdg,black.oxide 
4.standard:Din,ISO,JIS& ANSI

3. Hex Coupling Nuts Images

4. Hex Coupling Nuts Specification

5.FAQ

We have organized several common questions for our clients，may help you sincerely：

1. Q: Are you a factory or trading company?

A: We are a factory, will offer you best price and guarantee the quality.

2. Q: Can I get some samples?
A: Yes, we are honored to offer you free samples.

3. Q: How does your factory do regarding quality control?
A: We have strict control in testing of raw material, production process and final process. Only qualified products can be sent out.