Heavy Hex Bolts
- Home
- Exotic Metal Fasteners
- Heavy Hex Bolts
Sunmach manufactures high-performance Stainless Steel Heavy Hex Head Bolts and high-capacity Duplex Heavy Hex Head Bolts to mitigate mechanical fatigue, thread deformation, and localized stress corrosion cracking in high-stress structural configurations. Engineered with an expanded, heavy-series geometric head, these premium fasteners optimize load distribution across a larger bearing surface area. We provide versatile material solutions, ranging from cost-effective Stainless Steel Heavy Hex Head Bolts optimized for long-term atmospheric and marine rust defense, to advanced Duplex Heavy Hex Head Bolts manufactured from UNS S32205 alloys that deliver twice the yield strength of conventional steel hardware, ensuring an asset lifespan of up to 50 years.
Heavy Hex Bolts
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Heavy Hex 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 Heavy Hex 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 Heavy Hex Bolts delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Heavy Hex Bolts Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Heavy Hex Bolts are manufactured in various specifications including DIN, ISO, ANSI and IS standard in nominal diameters ranging from 3/8” to 3” (M10 to M76). We provide Heavy Hex Bolts in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Heavy Hex Bolts are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Heavy Hex 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 : | M10 to M76 |
| Imperial : | 3/8" to 3" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Bolt | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Heavy Hex Bolts | 931 | 4014 | B18.2.1 | 1364 |
Dimensions - Imperial
Dimensions - Metric
Frequently Asked Questions
Common questions about Sunmach Heavy Hex Bolts (Exotic Alloys)
Heavy Hex Bolts are designed with an enlarged head profile that is wider than standard fasteners. This increased surface area distributes clamping loads over a broader area and prevents the fastener head from shearing or sinking into mating materials under high preloads.
Duplex Heavy Hex Bolts combine high mechanical strength with outstanding defense against localized pitting and stress corrosion cracking in saltwater. Their balanced dual-phase structure allows marine equipment to remain securely clamped through dynamic wave forces without experiencing sudden stress cracking.
Stainless Steel Heavy Hex Bolts feature enlarged head dimensions that provide a larger wrench engagement area during assembly, preventing tool slippage and socket rounding when tightening connections to the high torque values required for pressure vessels.
Heavy Hex Bolts are specified for applications requiring large clamping preloads, heavy torque, and extreme pressure containment, such as securing high-pressure boiler casings, pipeline flanges, and structural joints exposed to continuous mechanical stresses.
Every premium batch must be dispatched with complete material traceability. This includes EN 10204 3.1 Mill Test Certificates verifying the raw material heat chemistry, physical pulling strength, hardness measurements, and dimensional inspection logs proving complete compliance with customer engineering drawings.