Definition - A Coupling Nut is a threaded nut used to connect and secure two shafts, rods, or fittings within a coupling assembly. Its purpose is to hold components together firmly and ensure proper alignment for reliable power or fluid transmission. Coupling nuts are commonly used in shaft couplings, pipe connections, machinery, and industrial assemblies.

Sunmach manufactures precision Coupling Nuts from premium Nickel Alloys and Stainless Steel. These custom-engineered nuts are produced as per customer drawings and strict tolerance requirements, making them suitable for critical industrial applications.

We are an ISO 9001:2015 certified company, demonstrating our commitment to rigorous quality standards and consistent product excellence to deliver the best of the Nickel Alloys & Stainless Steel Coupling Nut.

We make these Coupling Nut from a range of high-performance & exotic materials such as : Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205, Super Duplex S32750 to various Stainless Steel grades of SS 304L, SS 316L SS 310, SS 310H, SS 347H, etc followed by Special Stainless Steel Grades such as 904L Stainless Steel, UNS N08904, DIN EN1.4539 Nitronic® 50, Nitronic® 60, UNS S21800, DIN EN, 254 SMO, UNS S31254, DIN EN 1.454, Stainless Steel 410 & Stainless Steel 420 etc.

Sunmach’s extensive manufacturing capabilities and In-Stock Genuine & Authentic Raw Material availability allows us to support demanding industrial requirements with durable, corrosion-resistant, heat resistant & reliable Shafts made from Genuine Nickel Alloys and Stainless Steel Material, delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.