Spring Washers
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Sunmach manufactures high-performance Stainless Steel Spring Washers and Duplex Spring Washers, including conical Belleville and helical designs, engineered to eliminate bolt loosening on heavily vibrating industrial machinery. Unlike standard rigid flat washers that allow fasteners to back out under mechanical stress, these specialized spring washers deform elastically under clamping force to act as a heavy-duty cushion that continuously absorbs vibration energy. Cut to an ultra-precise thickness tolerance to prevent spring rate errors, they apply constant, predictable tension against the bolt head, ensuring the joint remains completely secure even through severe thermal expansion and contraction cycles. To ensure long-term safety in mission-critical aerospace, subsea, and processing environments, Sunmach produces these components using top-tier, virgin metals sourced from trusted global mills. High-strength choices like Super Duplex 2507 provide massive load-bearing spring capabilities and 50-year immunity against saltwater pitting, while Nitronic alloys offer excellent fatigue resistance without threat of thread seizure or galling. Fully compliant with international standards like DIN 2093, every production batch passes severe laboratory tracking including 100,000-cycle vibration torture testing and ships with official Mill Test Certificates (MTC) for total material trace transparency.
Spring Washers
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Spring 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 Spring 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 Spring Washers delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Spring Washers Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Spring 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 Spring Washers in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Spring Washers are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Spring 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 |
|---|---|---|---|---|
| Spring Washer | 931 | 4014 | B18.2.1 | 1364 |
Dimensions - Imperial
Dimensions - Metric
Frequently Asked Questions
Common questions about Sunmach Duplex Spring Washers
They are used to actively maintain clamp load, absorb severe mechanical vibrations, and compensate for thermal expansion and contraction in bolted joints. Unlike flat washers, spring washers provide continuous, active elastic spring tension, making them ideal for high-vibration and thermal-cycling applications such as offshore equipment, steam turbine casings, and petrochemical piping.
Standard 316L stainless steel has lower mechanical yield strength and is highly vulnerable to stress corrosion cracking (SCC) and pitting in chloride-heavy seawater. Duplex 2205 provides double the yield strength and superior fatigue limit resistance, ensuring the spring washer does not permanently deform under high preloads, maintaining its active locking force indefinitely in marine and chemical environments.
Belleville Washers (Conical Disc) are best for high-stress, heavy-load applications and can be stacked to adjust load-deflection curves. Wave Washers are ideal for moderate load applications requiring compact vertical clearance, such as compensating for thermal expansion in electric motors and bearings. Split Lock Washers (Helical Split) are used for light-duty vibration damping and general-purpose fastening.
As a bolt is tightened down, it compresses the curved or conical geometry of the spring washer. This elastic compression applies a continuous upward force against the bolt head or nut. If the assembly experiences vibration or minor thread relaxation, the spring washer extends slightly to fill the gap and re-applies clamping tension, preventing the fastener from rotating loose.
We conduct 100% load-deflection testing to verify that each batch matches specified mechanical tolerances. This is combined with precision stamping, edge deburring to remove stress risers, specialized solution annealing to prevent material embrittlement, and a complete EN 10204 3.1 trace certification package linking the finished components back to premium mill heat numbers.