When you are building in harsh, real‑world conditions, small components can make or break the integrity of your fixings. The Bremick 316 stainless steel flat washer M10x21x1.2mm is one of those quiet heroes in a bolted joint, making sure your M10 fasteners stay secure, your surfaces are protected, and your connections last in demanding environments. In this guide, we’ll unpack what this washer is, how it performs, and where it fits best so you can specify and use it with confidence.
Along the way, we’ll look at how the Bremick 316 stainless steel flat washer M10x21x1.2mm compares to 304 stainless, zinc‑plated steel, and other alternatives, and why marine‑grade 316 stainless is often the smarter long‑term choice in coastal, industrial, and outdoor applications.
What Is the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm?
At its core, the Bremick 316 stainless steel flat washer M10x21x1.2mm is a plain, round, metric flat washer designed for use with M10 bolts, screws, and studs. It has an inner diameter sized to comfortably clear a 10 mm fastener, a 21 mm outer diameter that spreads the load over a larger area, and a 1.2 mm thickness that adds stiffness without stealing valuable thread engagement.
Because the Bremick 316 stainless steel flat washer M10x21x1.2mm is a Form A washer to DIN 125A / ISO 7089 standards, it delivers a familiar and predictable geometry: flat faces, clean edges, and dimensions that match standard metric hardware. That means you can confidently pair it with your existing M10 bolts and nuts without worrying about compatibility.
This washer is manufactured from austenitic 316 stainless steel, sometimes called A4 stainless in fastener language. The Bremick 316 stainless steel flat washer M10x21x1.2mm uses this alloy to maximise corrosion resistance, especially in chloride‑rich environments such as coastal areas and marine installations. 316 stainless contains chromium, nickel, and a small but critical amount of molybdenum, which helps it resist pitting and crevice attack where lesser materials fail.
In practical terms, a pack of 100 units of the Bremick 316 stainless steel flat washer M10x21x1.2mm gives you a ready stock of durable, corrosion‑resistant washers that will match M10 fasteners in structural assemblies, equipment mounting, and general construction jobs where you cannot afford premature rusting or joint degradation.
Key Technical Specifications of the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm
Before choosing any fastening component, it helps to understand its technical profile. The Bremick 316 stainless steel flat washer M10x21x1.2mm combines simple geometry with high‑performance material properties.
From a dimensional standpoint, the Bremick 316 stainless steel flat washer M10x21x1.2mm is sized specifically around M10 hardware. The inner diameter is approximately 10 mm, providing clearance for an M10 bolt shank while still supporting the underside of the head or nut. The 21 mm outer diameter offers generous bearing surface, ensuring that loads are distributed over a wider area instead of concentrating under the fastener.
The 1.2 mm thickness of the Bremick 316 stainless steel flat washer M10x21x1.2mm is a sweet spot: thick enough to maintain shape under typical tightening torques, but thin enough not to interfere with thread engagement or overall stack height. For applications requiring extra rigidity, Bremick also offers a thicker 2.0 mm version in the same size envelope.
On the materials side, the Bremick 316 stainless steel flat washer M10x21x1.2mm is made from austenitic 316 stainless steel with typical mechanical properties in the range of 515 MPa ultimate tensile strength and around 205 MPa yield strength in the annealed condition. Elongation is generally around 40% or more, and hardness falls in the mid‑to‑high Rockwell B range, providing a good balance of toughness and wear resistance for general fastening duties.
These properties mean the Bremick 316 stainless steel flat washer M10x21x1.2mm is not a highly hardened structural washer like those used in high‑tensile bolted joints, but a robust general‑purpose washer perfect for construction, equipment, and marine assemblies where corrosion resistance and consistent load distribution matter more than extreme hardness.
Why Choose Grade 316 stainless steel for This Flat Washer?
One of the main reasons specifiers seek out the Bremick 316 stainless steel flat washer M10x21x1.2mm is its material grade. Not all stainless steels are created equal, and for many jobs, the difference between 304 and 316 stainless is the difference between a joint that stays sound and one that starts to stain and pit after a few seasons.
Grade 316 stainless steel, which underpins the Bremick 316 stainless steel flat washer M10x21x1.2mm, contains similar chromium and nickel levels to 304, but adds molybdenum. That molybdenum dramatically improves resistance to pitting and crevice corrosion in chloride‑bearing environments such as coastal air, salt spray, and certain industrial atmospheres.
If you use a standard 304 washer where the Bremick 316 stainless steel flat washer M10x21x1.2mm would be more appropriate, you may begin to see tea‑staining, localised rust spots, and surface roughness over time. While 304 is still called “stainless,” it can struggle in warm, salty or chemically aggressive conditions. In contrast, 316 stainless is often referred to as “marine grade” because it stands up far better in these demanding scenarios.
The choice of 316 in the Bremick 316 stainless steel flat washer M10x21x1.2mm also aligns well with modern building and infrastructure requirements, where longer design lives and reduced maintenance are critical. Using 316 stainless washers in exposed locations can help structures meet or exceed expected durability targets, especially when combined with other 316 fasteners and fittings.
Ultimately, if your project is anywhere near the coast, involves regular washdowns, or operates in a chemical‑rich atmosphere, the Bremick 316 stainless steel flat washer M10x21x1.2mm provides a level of corrosion resistance that cheaper alternatives simply cannot match over the long term.
Design Features That Make This Flat Washer Reliable
Although it looks simple, the Bremick 316 stainless steel flat washer M10x21x1.2mm has several design features that directly translate into performance on the job. The flat, circular geometry with its standardised dimensions is intended to support bolts and nuts in a predictable, repeatable way.
First, the broad 21 mm outer diameter of the Bremick 316 stainless steel flat washer M10x21x1.2mm spreads clamping forces from an M10 fastener over a larger surface area. This helps prevent pull‑through and surface crushing, particularly when fastening into softer materials like timber, plastics, aluminium, or thin sheet metal. Without a washer, the underside of a bolt head or nut can dig in and damage the substrate.
Second, the flat bearing surface of the Bremick 316 stainless steel flat washer M10x21x1.2mm provides a smooth, stable interface for tightening. As torque is applied, the nut or bolt head can rotate against the washer rather than against the base material, reducing the risk of galling or tearing on painted, coated, or softer surfaces. The result is a cleaner, more controlled clamping action.
The 1.2 mm thickness of the Bremick 316 stainless steel flat washer M10x21x1.2mm keeps it stiff enough to remain flat under load, but not so thick that it becomes springy or eats up thread. In most general‑purpose bolted joints, this thickness offers plenty of rigidity, particularly when combined with the inherent strength and hardness of 316 stainless.
Because it is a plain flat washer, the Bremick 316 stainless steel flat washer M10x21x1.2mm does not include serrations or locking features. That makes it very versatile: it can be used alone where vibration is low, or combined with spring washers, lock nuts, or chemical threadlockers in high‑vibration environments. Bremick’s own range includes compatible stainless locking hardware that can work alongside these flat washers.
Real‑World Applications for the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm
The versatility of the Bremick 316 stainless steel flat washer M10x21x1.2mm becomes obvious when you look at the environments where it is commonly specified. Because of its marine‑grade material and practical geometry, it fits naturally into a broad spectrum of industries.
In marine and offshore settings, the Bremick 316 stainless steel flat washer M10x21x1.2mm is an easy choice for use on boats, docks, pontoons, handrails, ladders, and marine fixtures that are regularly exposed to saltwater and spray. Here, 316 stainless excels at keeping joints free from rust stains and localised corrosion, preserving both appearance and structural integrity.
In coastal and exposed construction, the Bremick 316 stainless steel flat washer M10x21x1.2mm appears in balcony fixings, façade systems, balustrades, rooftop plant, and other external details where fasteners cannot be allowed to deteriorate prematurely. Pairing 316 washers with 316 bolts and nuts helps structures meet long‑term durability expectations in these aggressive environments.
Industrial facilities are another natural home for the Bremick 316 stainless steel flat washer M10x21x1.2mm. Food processing equipment, chemical plant, and wash‑down systems often combine water, cleaning agents, and elevated temperatures. In these settings, stainless hardware limits contamination and reduces maintenance downtime caused by corroded fasteners.
Even in general outdoor and architectural applications—such as garden structures, outdoor lighting, signage, and electrical enclosures—the Bremick 316 stainless steel flat washer M10x21x1.2mm helps avoid rust streaks and staining running down from fastener points. While inland projects might get by with galvanised washers, those closer to the coast or in humid climates benefit from the added protection of 316 stainless.
Overall, wherever you need reliable M10 fixings that will stay sound in the presence of moisture, chlorides, or regular cleaning, the Bremick 316 stainless steel flat washer M10x21x1.2mm is a logical and cost‑effective component.
How to Install the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm Correctly
Even the best washer can only perform as intended if it is installed properly. Fortunately, using the Bremick 316 stainless steel flat washer M10x21x1.2mm is straightforward, as long as you pay attention to a few key points during assembly.
The first step is selecting the correct size: for an M10 bolt or stud, you should use the Bremick 316 stainless steel flat washer M10x21x1.2mm with its 10 mm clearance hole. This ensures that the washer bears directly beneath the head or nut rather than leaving a gap that could cause uneven loading. Avoid mixing washer sizes just because they “fit over the bolt”; correct sizing makes a difference.
During assembly, place the Bremick 316 stainless steel flat washer M10x21x1.2mm flat against the material surface, then position the nut or bolt head on top of it. As you tighten, ensure the washer stays centred and does not tilt or ride up onto chamfers or edges. A flat, stable washer position helps the joint achieve uniform compression.
When stainless fasteners are involved, it is often wise to apply a suitable lubricant or anti‑seize on the threads before tightening. This recommendation also applies when you are using the Bremick 316 stainless steel flat washer M10x21x1.2mm in all‑stainless assemblies, because stainless‑to‑stainless combinations can be prone to galling if torqued dry.
Use normal torque values for M10 fasteners appropriate to your bolt grade and application. The Bremick 316 stainless steel flat washer M10x21x1.2mm is designed for moderate‑duty fastening, not ultra‑high‑tension structural bolts that require hardened washers. If your joint demands extremely high preload, consider consulting torque charts and using specifically rated structural washers instead.
Finally, after tightening, visually inspect the joint to confirm that the Bremick 316 stainless steel flat washer M10x21x1.2mm is still flat, undamaged, and correctly seated. If a washer is visibly deformed, bent, or gouged during installation, it is better to replace it than to reuse it and risk a compromised joint.
Compatible Fasteners and Accessories to Pair With the Washer
To get the best performance from the Bremick 316 stainless steel flat washer M10x21x1.2mm, it makes sense to use it in combination with compatible fasteners and accessories. This avoids galvanic corrosion issues and ensures the entire joint shares similar mechanical and corrosion‑resistance characteristics.
Ideally, you’ll pair the Bremick 316 stainless steel flat washer M10x21x1.2mm with 316 stainless steel bolts, set screws, and nuts. Using 316 across all components keeps the galvanic potential low and maintains a consistent appearance over time. Bremick’s range includes 316 stainless nuts and bolts in M10 sizes that complement these washers perfectly.
In situations where vibration is present, such as machinery, transport platforms, or mobile plant, the Bremick 316 stainless steel flat washer M10x21x1.2mm can also be combined with stainless spring washers or locking washers. The flat washer provides the bearing surface and load distribution, while the spring or lock component offers resistance to loosening.
You may also choose to pair the Bremick 316 stainless steel flat washer M10x21x1.2mm with structural anchors, channel systems, or bracketry that is hot‑dip galvanised or powder‑coated. While it is possible to mix stainless and galvanised components, be aware of the potential for galvanic corrosion in wet environments. If the stainless area is small relative to the galvanised area and the environment is not highly aggressive, the risk is often manageable, but in marine conditions, going fully stainless is usually safer.
Whether you’re assembling timber connections, fixing metal brackets, or mounting equipment, selecting matching fasteners allows the Bremick 316 stainless steel flat washer M10x21x1.2mm to play its role effectively in a well‑balanced joint.
Comparing the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm with Alternate Models
Bremick offers several washer options around the same size family, so it is useful to see where the Bremick 316 stainless steel flat washer M10x21x1.2mm sits in the range. For many users, the choice comes down to material grade and thickness.
Within the 316 stainless family, the Bremick 316 stainless steel flat washer M10x21x1.2mm has a thicker sibling—an M10 washer with the same 21 mm outer diameter but a 2.0 mm thickness. That alternative delivers a little more rigidity and bearing capacity, which may be appropriate if your joint is subject to higher compressive loads or if you want extra stiffness under oversized bolt heads.
Bremick also supplies a 304 stainless option in the same geometry. Compared to the Bremick 316 stainless steel flat washer M10x21x1.2mm, the 304 version is typically a bit more economical and perfectly adequate in many indoor or mildly exposed environments. However, it does not offer the same chloride resistance as 316, so for marine and coastal projects, the 316 grade is usually the better investment.
Beyond stainless, some applications consider zinc‑plated carbon‑steel washers. These can initially appear economical compared to the Bremick 316 stainless steel flat washer M10x21x1.2mm, especially on large projects. But galvanised or plated finishes will eventually break down, especially in coastal or chemically aggressive environments, leading to rust, staining, and possible loss of section.
Other alternatives include brass, nylon, and high‑tensile alloy‑steel washers. Brass can be useful in decorative or electrical applications; nylon offers electrical insulation and a degree of vibration damping; and hardened alloy‑steel washers are required in certain high‑strength structural connections. Still, none of these balances general strength, corrosion resistance, and versatility quite like the Bremick 316 stainless steel flat washer M10x21x1.2mm for everyday M10 fastening in harsh environments.
Cost, Packaging, and Ordering Considerations
From a procurement perspective, the Bremick 316 stainless steel flat washer M10x21x1.2mm is conveniently supplied in packs of 100. This bulk quantity means you have enough washers on hand for multiple projects or for repeated maintenance tasks, without having to order odd, small numbers each time.
While the upfront unit cost of the Bremick 316 stainless steel flat washer M10x21x1.2mm is higher than standard zinc‑plated or mild‑steel washers, the lifetime cost is often lower. Because 316 stainless is so resistant to corrosion, you are less likely to face premature replacements, problematic staining, or unexpected maintenance shutdowns caused by deteriorating hardware.
The packaging for the Bremick 316 stainless steel flat washer M10x21x1.2mm is typically manufacturer‑branded, making it easy to verify that you’ve received genuine Bremick product and to cross‑check part numbers against drawings or specifications. When ordering, specifying the full part number alongside the descriptive name helps avoid mix‑ups with 304 stainless or galvanised alternatives.
For project buyers and store managers, keeping a dedicated bin of the Bremick 316 stainless steel flat washer M10x21x1.2mm in the workshop or site store means installers can grab the correct washer straight away when dealing with M10 fixings in corrosive or outdoor environments. This improves consistency across the site and supports compliance with project specifications.
Frequently Asked Questions About the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm
Because the Bremick 316 stainless steel flat washer M10x21x1.2mm is such a widely useful item, a few common questions tend to come up from specifiers, installers, and buyers. Here are some of the key ones, along with brief answers.
Is the Bremick 316 stainless steel flat washer M10x21x1.2mm suitable for structural bolting?
The washer offers robust performance for general fastening, but it is not a hardened structural washer. For high‑tensile structural bolted joints that require specific washer grades, follow the relevant standards and select washers rated for those applications.
Can I mix the Bremick 316 stainless steel flat washer M10x21x1.2mm with galvanised bolts?
In some situations you can, but be cautious. In wet or marine environments, dissimilar metals in contact can experience galvanic corrosion. For the best long‑term durability, pair this washer with 316 stainless fasteners.
Will the Bremick 316 stainless steel flat washer M10x21x1.2mm rust over time?
In normal service, 316 stainless offers excellent resistance to rust and staining, especially compared to zinc‑plated or even 304 stainless. No metal is completely immune under all conditions, but this washer is designed specifically for harsh and coastal environments.
Is the Bremick 316 stainless steel flat washer M10x21x1.2mm magnetic?
Like most austenitic stainless steels, 316 is typically only weakly magnetic, if at all. Any slight magnetism that develops usually comes from cold‑working during manufacturing and does not affect corrosion performance.
Why choose the Bremick 316 stainless steel flat washer M10x21x1.2mm over nylon or brass?
Nylon and brass washers have their place, especially where insulation or specific aesthetics are needed. However, they do not match the strength, temperature resistance, and durability of 316 stainless in demanding structural or outdoor roles. For most serious fastening jobs in tough environments, stainless is the more robust option.
By understanding how the Bremick 316 stainless steel flat washer M10x21x1.2mm behaves and where it excels, you can make smarter choices about when to specify it and how to install it.
Related Product Collections to Explore
➜ Washers Collection – Explore a wide range of flat, spring, and specialty washers, including stainless steel options that complement the Bremick 316 stainless steel flat washer M10x21x1.2mm for different fastening tasks.
➜ Nuts & Bolts Collection – Build complete fastening solutions by pairing your Bremick 316 stainless steel flat washer M10x21x1.2mm with compatible M10 bolts, nuts, and cap screws designed for industrial and construction applications.
➜ Bremick Fasteners & Fixings – Browse the full range of Bremick fasteners and fixings, from stainless steel washers to nuts and bolts, so you can keep consistency across your projects and match your washer with genuine Bremick hardware.
Conclusion: Building Better Joints with the Bremick 316 Stainless Steel Flat Washer M10x21x1.2mm
When you step back and look at the whole picture, the Bremick 316 stainless steel flat washer M10x21x1.2mm offers a combination of benefits that is hard to beat for M10 fastening in harsh or exposed environments. Its carefully chosen dimensions deliver efficient load distribution and surface protection, while the marine‑grade 316 stainless material ensures excellent corrosion resistance and reliable mechanical performance over many years of service.
Whether you are assembling marine railings, fixing coastal structures, mounting industrial equipment, or simply looking for a dependable washer that you won’t have to revisit in a hurry, the Bremick 316 stainless steel flat washer M10x21x1.2mm is a smart, future‑proof choice that supports long‑term durability and reduced maintenance.
If you are planning a new project or reviewing an existing specification, it’s worth taking a moment to visit the product page for the Bremick 316 stainless steel flat washer M10x21x1.2mm. There you can confirm the latest technical details, check pack availability, and ensure that the washers you select align perfectly with the conditions your structure or equipment will face over its lifetime.