The Importance of Sizing When it Comes to Metal Fasteners

By Patrick Gomes | July 10, 2024

No matter the scale or nature of your project, using the correct size of metal fasteners is crucial to the success of your operation. Improper sizing can cause numerous issues, from compromised structural integrity to reduced durability. 

All it takes is a single fault in your fastener components, and it can lead to disastrous consequences, including damaged machinery, costly repairs, and significant downtime.

In this blog, we’ll explore key considerations for choosing the right-sized components for your project. 


Why sizing matters

The machinery and equipment used in high-stakes industries often involve cutting-edge technology and engineering that requires precision at every stage, right down to the components that make it tick. If component sizing is miscalculated, it can lead to a whole host of issues. Here are three key issues that may occur due to incorrect sizing: 


Structural integrity

A metal fastener can be manufactured using the highest-standard materials available and crafted by expert engineers, but if it is installed in the wrong-sized application, its structural integrity can still be compromised.

For example, if the fastener size is too small, it may not have the strength to maintain its connection to the machinery, leading to potential failures. On the other hand, an oversized fastener might damage the materials and machinery it is applied to. 


Load distribution

Another crucial consideration is the machinery’s stress on the component. Sizing is an essential element of machinery components because of load distribution. Sizing needs to be correct to support the weight evenly across the joint. A component may be damaged due to the strain applied at a single point if it is too small. The part needs to be the right size to be large and durable enough to withstand the stress of the load. 


Compatibility with materials

When choosing the correct size components, consider the materials used to manufacture them and the machinery itself. 

Different materials have varying levels of hardness and density, which means that the size of the metal fastening screws and bolts need to be compatible with the materials used to construct your machinery. 


Choosing the right size 

The machinery used in high-stakes industries can be extremely complex, and making decisions about its components can be daunting, regardless of whether you are an expert in your field. Here are three key factors to consider to ensure you choose the right size components: 


Measuring dimensions

Accurate dimensions measurements, such as diameter, are crucial when choosing the right size components. They determine the strength and materials needed and the types of tools required for the installation.


Considering the length 

The length of the fastener should match the thickness of the materials being joined. Too short, and the fastener won’t hold the materials securely; too long, and it might pierce or dent the material, posing issues with installation and machinery safety risks.


Thread count and pitch 

The thread count and pitch affect how well the fastener grips the material. Fine threads are ideal for hard materials, while coarse threads work better with softer materials. 

When it comes to your machinery components, there’s a lot at stake, which is why, even with the correct specifications, it’s understandable to want to seek expert advice when choosing the right size for your metal fasteners. 

Our experts at Wulfrun are here to help you determine the ideal component size for your requirements. For tailored advice, don’t hesitate to get in touch with your project specifications.


Ensure project success with bespoke components from Wulfrun 

At Wulfrun, we have been industry-leading fastener specialists for over 35 years. Our curated team offers expertise and experience you won’t find anywhere else. 

Trusted by multiple high-stakes industries, from the oil and gas sector to the Ministry of Defence, we are dedicated to manufacturing and delivering the highest-quality fastener products on the market. 

Our clients can rely on us for a comprehensive range of tailored solutions to meet their unique needs. For more information and personalised support, contact a member of our team today. 


Material Grades

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.

Customised washer components from Wulfrun

Choosing the right material grade is crucial for ensuring the durability and performance of your washer components. It’s important to take into account the unique requirements of your application, from environmental exposure to mechanical stress. 

No matter what your industry or the environmental challenges in which you operate, Wulfrun can craft components customised to any available material grade, ensuring you have the reliable, high-quality components. 

If you’re unsure which material grades are suitable for your components, don’t hesitate to contact our team today with your project specifications for tailored advice.

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