Low-Strength Steel Coupling NutsJX-22CNC543-M20-6-ST, surface treatment electroplating environmental protection ROHS color zinc

Low-Strength Steel Coupling Nuts

Also known 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.

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

Hot-dipped galvanized steel coupling nuts have a thick coating for better corrosion resistance than zinc-plated steel nuts. They must be used with other hot-dipped galvanized fasteners.

Zinc-flake-coated steel coupling nuts are 40 times as corrosion resistant as zinc-plated steel coupling nuts and are comparable to Magni-coated nuts. They meet ASTM B117, which means they withstand 1, 000 hours of salt spray.

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

Metric 18-8 Stainless Steel Coupling Nuts

Made from 18-8 stainless steel, these metric coupling nuts have good chemical resistance and may be mildly magnetic. Also known as extension nuts, use them to connect and extend threaded rods.

Coupling nuts with a black-oxide finish has a dark surface color.

Packing: Inner is Poly foam, out is carton. Then pallet. Carton size: 29*19*19.5CM and 23.5*17.5*8, CM and pallet size is: 215*100*90CM, or as your requirement.

Packaging & Delivery and Packaging Details

1. Shrink film+wooden box

2. Cardboard box+pallet

3. Color box

4. As per the customer's request