Hex Flagned Nuts
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Sunmach manufactures high-performance Stainless Steel Hex Flanged nuts and Heavy-Duty Duplex Hex Flanged Nuts designed to deliver secure, vibration-resistant fastening in demanding aerospace, marine, and subsea structural installations. Traditional fastening methods require a separate hex nut and loose washer, a configuration prone to shifting and losing clamping tension under continuous mechanical shaking while leaving internal gaps where moisture can trigger hidden Crevice Corrosion. Sunmach's specialized Flanged Nuts resolve these engineering hazards by Hot-Forging the Hex Head and a wide, washer-like collar into a single solid piece of hardware, expanding the bearing footprint by 2 to 3 times to achieve a 50% reduction in localized surface stress while acting as a rigid, integrated anchor that dampens resonance. To ensure long-term, fail-safe operation in aggressive chemical processing plants, desalination networks, and high-pressure subsea environments, Sunmach cold-taps these fasteners to a strict ±0.05 mm thread tolerance that guarantees a perfect thread mesh and eliminates thread stripping. Specialized alloy grades within our line of stainless steel hex flanged nuts (such as Nitronic 60) provide exceptional fatigue resistance and lower thread friction to stop galling during repeated maintenance cycles, while our specialized duplex hex flanged nuts deliver double the structural yield strength and full NACE MR0175 compliance for sour gas environments. Backed by an ISO 9001:2015 certified quality protocol, every production batch passes severe laboratory trials including heavy proof-loading and ASTM G48 chemical corrosion audits and ships with complete EN 10204 3.1 Mill Test Certificates for absolute material trace transparency.
Hex Flagned Nuts
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Hex Flagned 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 Hex Flagned 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 Hex Flagned Nuts delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Hex Flagned Nuts Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Hex Flagned Nuts are manufactured in various specifications including DIN, ISO, ANSI and IS standard in nominal diameters ranging from 1/4” to 3/4” (M6 to M20). We provide Hex Flagned Nuts in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Hex Flagned Nuts are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Hex Flagned 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 M20 |
| Imperial : | 1/4" to 3/4" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Bolt | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Hex Flagned Nut | 931 | 4014 | B18.2.1 | 1364 |
Dimensions - Imperial
Dimensions - Metric
Frequently Asked Questions
Common questions about Sunmach Stainless Steel & Duplex Hex Flanged Nuts
A separate nut and washer can easily shift or rotate independently when a machine vibrates violently, bleeding off clamping tension and allowing the joint to loosen. A one-piece stainless steel hex flanged nut locks down as a single solid unit, removing the risk of washer slippage and eliminating crevice gaps.
Standard nuts place a high-intensity clamping force into a very small circle beneath the hex head, which can scratch, gouge, or dent softer industrial metals. The integrated base of a flanged nut expands the footprint area by 2 to 3 times, lowering surface bearing stress by 50%.
You should specify Nitronic 60 if your fasteners experience continuous, high-frequency shaking and require repeated removal during routine maintenance. Nitronic 60 contains a specialized nitrogen-hardened structure that lowers friction, allowing technicians to tighten and remove the flanged nuts over 100 times without thread damage.
Snapping is prevented during the hot-forging process. Sunmach uses temperature-controlled hot forging to force the internal metal grains to flow naturally and continuously into the flange shape, ensuring the entire piece functions as an unbreakable, high-load unit.