Hex Head Bolts
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Sunmach is a trusted global manufacturer and supplier of premium Duplex 2205 Hex Head Bolts, delivering high strength, corrosion resistant fastening solutions for critical industrial and marine assemblies. With over 13 years of dedicated experience in precision fastener manufacturing, we utilize advanced forging and in house heat treatment processes to produce high integrity Duplex 2205 Hex Head Bolts designed to secure high-pressure piping, chemical reactors and subsea structures. By managing the entire production cycle under strict quality controls, we produce high integrity bolts that actively resist thread stripping, joint relaxation, and localized environmental degradation, providing a reliable and durable connection system under extreme mechanical preloads. These premium fasteners are specifically engineered to perform flawlessly in the world's most demanding process and marine environments. The outstanding structural integrity of our Duplex 2205 Hex Head Bolts makes them the premier choice for securing high-pressure piping flanges, complex chemical reactors, and deepwater subsea structures where asset longevity and safety are paramount. By combining excellent resistance to saltwater pitting with twice the mechanical yield strength of standard stainless steels, our custom forged bolts protect critical joints from sudden fatigue failures and stress corrosion cracking, ensuring secure pressure boundaries and preventing costly operational shutdowns.
Hex Head Bolts
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Hex Head Bolts 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 Head Bolts 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 Head Bolts delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Hex Head Bolts Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Hex Head Bolts 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 Hex Head Bolts in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Hex Head Bolts are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Hex Head Bolts 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 |
|---|---|---|---|---|
| Hex Head Bolt | 931 | 4014 | B18.2.1 | 1364 |
Dimensions - Imperial
Dimensions - Metric
Frequently Asked Questions
Common questions about Sunmach Stainless Steel Hex Head Bolts / Duplex Hex Head Bolts
Duplex Hex Head Bolts provide significantly higher mechanical strength and superior fatigue resistance compared to traditional Stainless Steel Fasteners, allowing engineers to use smaller or fewer bolts while maintaining maximum joint integrity, reducing overall structural weight.
Our premium stainless steel hex head bolts are manufactured using precision thread-rolling rather than thread-cutting, which preserves the continuous metal grain flow along the thread profile, distributing installation preloads uniformly and eliminating localized stress points.
Offshore installations expose fasteners to stagnant, oxygen-depleted marine environments where standard metals suffer from rapid localized crevice corrosion. Heavy-duty duplex hex head bolts provide a balanced dual-phase atomic structure that naturally blocks saltwater pitting and stress corrosion cracking.
Yes. Duplex Hex Head Bolts exhibit an incredibly high fatigue limit that allows them to absorb ongoing physical shocks and cyclic vibrations without experiencing micro-deformations, maintaining vital pre-loaded clamping force without relaxing or backing off.
Every batch undergoes strict quality inspections, including structural composition testing, physical pulling strength audits, and internal scans for hidden subsurface defects. Each shipment is delivered with comprehensive mill test certificates tracing every finished bolt back to its original raw material source.