Hex Head Cap Screws
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Sunmach manufactures high-performance Duplex 2205 Hex Head Cap Screws designed for precision fastening in space constrained and highly corrosive industrial applications. Unlike Standard hex bolts with larger protruding heads, our Hex Head Cap Screws feature a compact, low profile head that allows installation in tight assemblies while delivering the full strength and superior corrosion resistance of Duplex stainless steel. Traditional 316L cap screws often suffer from pitting, crevice corrosion and insufficient strength in seawater or chemical environments, leading to premature joint failure. Sunmach’s Duplex 2205 version solves this with nearly double the yield strength and excellent resistance to stress-corrosion cracking. These cap screws are ideal for chemical reactor mounting, desalination plant equipment, aerospace components, pressure vessel closures and marine machinery where both compact design and long-term reliability are critical. Produced using certified raw materials, advanced hot forging, precision CNC machining and controlled heat treatment, they ensure dimensional accuracy, high tensile strength and outstanding performance in harsh operating conditions for 20–30+ years.
Hex Head Cap Screws
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Hex Head Cap Screws 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 Cap Screws 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 Cap Screws delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Hex Head Cap Screws Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Hex Head Cap Screws are manufactured in various specifications including DIN, ISO, ANSI and IS standard in nominal diameters ranging from 1/4” to 2.5” (M6 to M64). We provide Hex Head Cap Screws in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Hex Head Cap Screws are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Hex Head Cap Screws 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 M64 |
| Imperial : | 1/4" to 2.5" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Bolt | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Hex Head Screw | 931 | 4014 | B18.2.1 | 1364 |
Dimensions - Imperial
Frequently Asked Questions
Common questions about Sunmach Duplex 2205 Hex Head Cap Screws
A: They are ideal for tight-space assemblies such as chemical reactor mounting, desalination equipment, pressure vessel closures, aerospace components and marine machinery where a low profile head is required.
A: Duplex 2205 offers nearly double the yield strength and much better resistance to pitting and stress-corrosion cracking in seawater and chloride environments.
A: They are manufactured according to ISO 4762, DIN 912, ANSI B18.3 and other international specifications.
A: Choose Duplex 2205 for excellent performance and cost balance in Standard offshore and chemical applications. Select Super Duplex 2507 only for extreme deepwater or highly aggressive chloride service.
A: All screws come with complete material traceability and EN 10204 3.1 Mill Test Certificates. We are an ISO 9001:2015 certified manufacturer with over 13 years of high-performance fasteners.