Special Nuts
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In high-stress industrial applications, Standard fasteners are not enough to Withstand extreme temperatures, high pressures, and highly corrosive environments. These demanding conditions require engineered fastening solutions that ensure long-term mechanical integrity and reliability. Sunmach is a leading global manufacturer and supplier of Standard and custom Nickel Alloy Special Nuts, Duplex Nuts, and high-performance Stainless Steel Nuts. As an ISO 9001:2015 certified company, we maintain strict quality control systems backed by 100% material traceability, certified mill test documentation, and consistent batch-level inspection to ensure uncompromised performance in critical applications worldwide. Our advanced manufacturing capabilities utilize Hot Forming Technology to produce nuts in compliance with international Standards such as DIN, ISO, ANSI, and IS. We offer a wide size range from 1/4” to 3” (M6 to M76) with both metric and imperial thread options to support global industrial requirements. Our material portfolio includes high-performance Nickel Alloys such as Hastelloy®, Monel®, and Inconel®, Duplex and Super Duplex grades like S31803, S32205, and S32750, along with premium stainless steels including 304L, 316L, 310, 347H, 904L, 254 SMO, Nitronic® 50/60, and A4-80. These materials are engineered for superior corrosion resistance, thermal stability, and strength, making them ideal for energy, aerospace, marine, chemical processing, and other mission-critical industries with global supply capability and reliable logistics support.
Special Nuts
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Special Nuts engineered for the most 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 & Special Steel Fasteners.
Nickel Alloys Special Nuts are manufactured by us 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, A4-80 Stainless Steel 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 Nickel Alloys Special Nuts delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Special Nuts Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Special Nuts are manufactured in various specifications including DIN, ISO, ANSI and IS standard in nominal diameters ranging from 1/4” to 3” (M6 to M76). We provide Special Nuts in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Special Nuts are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Special Nuts Application Industries
Sunmach serves a diverse range of markets including Chemical Processing, Semiconductor, Power Generation, Aerospace, Oil & Gas, Pharmaceutical, Food & Beverage, Marine, Pulp & Paper, Petrochemical & Refining, Air Pollution Control and Water Treatment.
Sizes
| Metric : | M6 to M76 |
| Imperial : | 1/4" to 3" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Bolt | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Special Nut | 931 | 4014 | B18.2.1 | 1364 |
Frequently Asked Questions
Common questions about Sunmach Premium Nickel Alloy, Duplex, & Stainless Steel Special Nuts
Duplex nuts combine the best properties of austenitic and ferritic stainless steels, providing roughly twice the yield strength of standard stainless steel grades and offering significantly higher resistance to stress corrosion cracking, pitting, and crevice corrosion in chloride-rich environments.
Yes. Alongside our standard inventory matching DIN, ISO, and ANSI specifications, our engineering team uses advanced hot forming technology to manufacture custom special nuts tailored to your exact dimensional blueprints, thread requirements, and material preferences.
As an ISO 9001:2015 certified manufacturer, all Sunmach shipments include complete documentation, including material test reports, compliance certificates, and 100% traceability records back to the raw material heat number.