A Guide to Special Ancillary Products

By Patrick Gomes | April 10, 2024

In high-stakes industries, it’s essential to be able to rely on your special bolting and CNC-machined components for uncompromising performance, especially during unique applications in demanding environments.  

At Wulfrun, our special ancillary products are manufactured to optimise performance and reduce the risk of time-consuming repairs and costly downtime. In this blog, our experts introduce you to the wide range of special ancillary products we have available.


What special ancillary products are available from Wulfrun?

We can customise all of our special ancillary products to meet your specific requirements or to industry-standard options. You can select from a range of material grades and sizes, from M3 up to M120. Our diverse range of premium quality products include:


Headed products

  • Bolts
  • Screws
  • Plugs
  • Special bolts and screws


  • Industry-standard nuts
  • Industry-special nuts


  • Fully threaded studs
  • Double-ended/Engineering studs


  • Industry-standard washers
  • Lock washers


Material grades available from Wulfrun

Standard off-the-shelf solutions often fall short when it comes to withstanding extreme conditions, corrosive environments, high pressures, or intense temperatures, which is why the customisation of material grades is crucial for high-criticality components. 

Whether it’s corrosion-resistant alloys for offshore drilling rigs, high-strength steels for subsea pipelines, or heat-resistant superalloys for nuclear reactors, we can craft products using the ideal material for your specific requirements.

Our products are made to order and can be created out of an extensive range of material grades, including:

  • Stainless steel
  • Carbon and alloy steels 
  • Petrochemical materials 
  • Power generation 
  • Nickel alloy and duplex sheets
  • Non-ferrous 
  • Aircraft grades

We also offer tailored solutions such as plating and heat treatments to further enhance performance, durability, and longevity.

For more information about the specific material grades we have on offer, you can find out more here. 

See full list of material grades


Our accreditations

At Wulfrun, we fully understand the importance of reliability, performance, and safety for our clients’ peace of mind. That’s why we adhere to rigorous industry standards such as ASTM, ANSI, BS, ISO, UNI, AFNOR, and DIN to ensure that every component we manufacture is of the highest quality. Our strict regulatory compliance ensures that our products perform flawlessly, even in the most demanding applications.


Guaranteed quality and performance with special ancillary products from Wulfrun

Discover the ultimate combination of reliability and performance in special ancillary products with Wulfrun. In high-stakes industries where failure is not an option, you can trust our specialised bolting and CNC machined components, designed for unparalleled performance in demanding environments. From bolts to nuts, studs to washers, each component is meticulously crafted to optimise performance and minimise downtime.

Get in touch with a member of our team with your product specifications for a no-obligation quote. 


As mentioned, we offer a wide range of materials for customised components. You can find more detailed information on the various material grades available, as well as their unique properties and recommended applications here.

The Material Grades We Work With

Wulfrun can provide components for the following stainless steel material grades: 304 / 304L, 310, 316 / 316L, 321, 347, 410, 421, 422, 431, 904L, ISO 3506-1 / 2 – A4 (50 / 70 / 80 / 100), ISO 3506-1 / 2 – A2 (50 / 70 / 80 / 100).

Wulfrun can provide components for the following carbon & alloy steel material grades: EN3A (070M20), EN8 (080M20), EN8D (080A42), EN16 (605M36), EN19 (708M40), EN24 (817M40), EN26 (826M40), ISO 898-1 Grade 8.8, ISO 898-1 Grade 10.9, ISO 898-1 Grade 12.9, ISO 898-2 Grade 8, ISO 898-2 Grade 10, ISO 898-2 Grade 12, C35E, C45E, 25CRMO4, 42CRMO4.

Wulfrun can provide components for the following petrochemical material grades: ASTM A193 B6, ASTM A193 B7, ASTM A193 B7M, ASTM A193 B8 (CLASS 1 & CLASS 2), ASTM A193 B8T (CLASS 1 & CLASS 2), ASTM A193 B8C (CLASS 1 & CLASS 2), ASTM A193 B8R, ASTM A193 B16, ASTM A320 L7, ASTM A320 L7M, ASTM A320 L43, ASTM A194 2H, ASTM A194 2HM, ASTM A194 7, ASTM A194 7M, ASTM A194 8, ASTM A194 8A, ASTM A194 8M, ASTM A194 8MA, ASTM A194 8T, ASTM A540 GRADE B21, ASTM A540 GRADE B22, ASTM A540 GRADE B23.

Wulfrun can provide components for the following power generation material grades: 1.4913 – X19CRMOVNBN11-1, 1.4923 – X22CRMOV12-1, 1.6582 – 34CRNIMO6, 1.7709 – 21CRMOV5-7, 1.7711 – B16, 1.7729 – DUREHETE 1055 – 20CRMOVTIB4-10.

Wulfrun can provide components for the following nickel alloy and duplex sheet material grades: INCONEL 600, INCONEL 625, INCONEL 718 – API 6A / AMS 5662 / AMS 5663, INCONEL 725, INCONEL X-750, ASTM A453 GRADE 660 (A/B/C/D), HASTELLOY C22, HASTELLOY C276, HASTELLOY X, S32760 ‘A’ / ‘S’ / FG / FLT / NORSOK D59 / NORSOK D60, S31803, S32750, S31254 / 254SMO, MONEL 400, MONEL K500, INCOLOY 800, INCOLOY 800HT, INCOLOY 825, INCOLOY 925, NIMONIC 80A, 17-4 PH, WASPALOY.

Wulfrun can provide components for the following non-ferrous material grades: HIDRURON 130, HIDRURON 191, COPPER NICKEL 70/30, COPPER 90/10, PB101, PB102, PB103, PB104, TITANIUM GRADE 2, TITANIUM GRADE 5, TITANIUM GRADE 7, DEF STAN 02-833, DEF STAN 02-834, C63000, C63200, CZ121 / CA104.

Wulfrun can provide components for the following aircraft material grades: JETHETE X-152.

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