Special Washers
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Sunmach is an ISO 9001:2015 certified premier global manufacturer specializing in high-tolerance industrial fasteners, including high-strength Duplex Washers and industrial-grade Stainless Steel Washers. Precision-engineered via advanced stamping, hot forming, and edge-deburring, these components are critical for distributing clamping force, preventing surface damage, and ensuring joint integrity under extreme mechanical stress. Manufactured to strict international Standards (DIN, ISO, ANSI/ASME), they are available in nominal sizes from 1/4” to 4” (imperial) and M6 to M100 (metric). Crucially, Sunmach emphasizes matching the metallurgy of your entire fastener system, utilizing a Standard carbon steel washer with high-performance bolts can trigger galvanic corrosion, whereas upgrading to specialized options like Duplex Washers prevents localized chloride attack and pitting in stagnant saltwater conditions. To support demanding global infrastructure projects and strict refinery shutdown timelines, Sunmach ensures absolute supply chain transparency with 100% material traceability from the raw heat number to the finished product. Every batch of Stainless Steel Washers and Duplex Plain Washers is shipped with comprehensive EN 10204 3.1 Mill Test Certificates (MTC) verifying exact chemical composition, hardness tests, and dimensional audits. Backed by a strategic international logistics network, these high-performance washers provide critical load distribution across high-stress global sectors ranging from marine splash zones and subsea flowlines to petrochemical refining, aerospace propulsion frameworks, and industrial water treatment networks.
Special Washers
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Special Washers 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 Washers 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 Washers delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Special Washers Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Special Washers 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 Washers in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Special Washers are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Special Washers 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 Washer | 931 | 4014 | B18.2.1 | 1364 |
Frequently Asked Questions
Common questions about Sunmach Premium Nickel Alloy, Duplex, & Stainless Steel Washers
Using mismatched materials can trigger rapid galvanic corrosion. Specifying Stainless Steel Washers that match your bolts ensures electrochemical compatibility, preventing joint degradation and protecting component surfaces under continuous exposure to moisture and industrial washdowns.
You should specify Duplex Washers for heavy-duty assemblies subjected to severe mechanical stress, cyclic loading, or stagnant saltwater. Their unique dual-phase metallurgy delivers high yield strength and exceptional resistance to localized chloride attack and pitting.
Sunmach manufactures high-tolerance Stainless Steel Washers and duplex variants using advanced stamping and hot-forming techniques, produced to strict DIN, ISO, and ANSI/ASME standards in nominal sizes from 1/4 inch to 4 inches (imperial) and M6 to M100 (metric).
Every batch is backed by 100% material traceability and dispatched with comprehensive EN 10204 3.1 Mill Test Certificates (MTC) verifying precise chemical composition, hardness tests, and dimensional audits.