Category Archives: Duplex

Anchor Bolt, Duplex, SuperDuplex Fasteners

Shield Anchor Bolts

Hague Fasteners have recently seen a dramatic increase in the demand for Drop in Shield Anchor Bolts of a non-proprietary brand but in superior materials than the standard mass produced conventional proprietary types such as the Hilti Shield Anchor Bolt, Rawlplug Drop In Anchor Bolts, Hawk Shield Anchor Bolts & Fischer Anchor Shields.

Shield Anchor Bolts
Custom Made Super Duplex Shield Anchor Bolt Assembly

Shield Anchor Bolts

Hague Fasteners can solve your concrete fixing issues where superior corrosive properties are required or where a superalloy complete fixing is needed.

More often now the demand is for a Super Duplex Concrete Fixing or 316Ti Anchor bolts and Hague are on hand to manufacture your custom batch requirements on a project by project basis.
Our expertise in special fasteners enable you to order 2pcs, 5pcs, 25pcs or whatever you need. There is no “minimum box quantity” as all our fastener & fixings are made to order with a delivery time tailored to suit your demands.

254SMO, Custom Fasteners, Duplex, Special Fasteners, Subsea

UNS S31254 Fasteners

The high integrity bolts and special fasteners that Hague Fasteners manufacture are often installed into highly aggressive environments.

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Anti-corrosion materials are therefore commonly specified where reliance on a surface coating is simply impractical.

The 6% Mo Duplex Stainless Steel materials are among the best stainless steels for use in water and seawater giving excellent service in some very aggressive environments.

This various special fasteners including Hex Bolts, Eng Studs, Studbolts, Hex Nuts and Socket Capscrews Hague manufacture in 6Mo (254Smo) stainless are often specified due to the following characteristics:

• Comparable pitting and crevice corrosion resistance (PREN > 40, akin to SuperDuplex Fasteners.
• Excellent resistance to strong acids.
• Excellent stress corrosion cracking resistance.
• Higher yield strength than standard stainless steels available in Class 70 and Class 80 Cold Worked strength grades.
• Good impact toughness at sub-zero temperatures (even tougher than SuperDuplex grades).
• A cost effective alternative to some of the more expensive nickel base superalloys.

Hague Fasteners are manufacturing all types of UNS S31254 Special Fasteners and supplying global industry sectors such as:

Pulp and paper, Water Desalination Facilities, chemical processing plant, chemical tanker transportation, heat exchangers & Tubing Condensers, metal refining, flue gas desulphurisation (FGD), structural subsea fastener components, offshore oil and gas equipment, submarines & aggressive food processing manufacturing lines.

Whatever your application, whatever your design, you can trust Hague to manufacture and deliver Special Fasteners on time.

Alternative Specifications include:-
254SMO, 6Mo, 6% Mo, 1.4529, 1.4547, N08926, UNS S31254, Duplex

Duplex, Materials, Special Fasteners

Duplex Stainless Threaded Fasteners

2205 Duplex is often the grade specified for Anti-Corrosive Fasteners used in Subsea & Offshore applications where 316/316L simply does not give adequate corrosion resistance.

duplex stainless threaded fasteners

This 22Cr5Ni3Mo Duplex Steel demonstrates the following critical characteristics:

• Twice the strength of standard austenitic grades
• Excellent pitting and crevice corrosion resistance
• Excellent resistance to stress corrosion cracking
• Good weldability
• Moderate impact toughness at temperatures as low as -80°C

Hague Fasteners are supplying Special Manufactured Duplex Stainless Threaded Fasteners into global chemical and oil & gas marine facilities where their special bolting operate in very aggressive conditions.

Further, custom fasteners in Duplex Stainless are manufactured for Food Processing machinery and Chemical Production Plants where the Duplex stainless steels Resistance to stress corrosion cracking is particularly important at higher temperatures.

Duplex Fasteners

Global applications Hague Fasteners supply Duplex UNS S31803 bolting to include:

Offshore oil and gas, chemical processing, desalination plant, pulp and paper, designed architecture in coastal locations, brewing, food processing, bridges, tensioning systems, nuclear reprocessing, tunnel infrastructure, chemical tanker ships.

Contact Hague Fasteners where massive experience in manufacturing precision engineered components in 2205 Duplex (1.4462) gives peace of mind wherever there is an aggressive environment.

254SMO, Duplex, Engineer studs, exotic materials, Hastelloy, Hex Nuts, Incoloy, Inconel, Monel, sales brochure, studbolt, Studbolts, Super Duplex, tie bar, Titanium, waisted studbolts, Washers, wheelstuds

Hague Fasteners Product Showcase: Studbolts

Standard studbolts are now widely available off the shelf in the more obvious ASTM grades such as B7, B7M, L7, L7M, B8 or B8M, but we continue to provide a unique manufacturing service of studbolts and ancillary products such as washers in the more exotic materials.



Recent projects have seen studbolts and threaded rod, complete with heavy hex nuts, to BS4882 or ANSI B16.5 and ANSI B18.2.2 or BS1769 respectively, being manufactured by us in the Duplex grade 254SMO (Also known under the specifications UNS S31254, 1.4547, X1 CrNiMoCuN 20-18-7 and F44).

Over the years we have produced studbolts and heavy hex nuts in a wide range of these Duplex and Super Duplex grades as well as in grades of Incoloy, Inconel, Hastelloy, Monel, Titanium and many other nickel-based critical alloys.



As we are not stockists of petrochemical grade studbolts and hex nuts we will not be able to compete with importers who buy their product in bulk quantities, but we are very competitive with any item that they do not have on their shelves or in their stock, particularly in these critical alloys and with rolled or screw-cut threads.

We can produce any type of studbolt:  threaded rod (DIN975 & DIN976), tie bar, waisted studbolts (DIN2510), engineer studs (DIN938) slotted studbolts & wheelstuds or to your specific drawings or sample pieces.  Please contact us for more details or view our sales brochure.