316 Stainless Flush Mount Countersunk Washer
316ss Flush CSK Washer
316 Stainless Flush Mount Countersink Washer
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316 Stainless Flush Countersunk Washers

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Introducing our one-of-a-kind machined washers that we had made specially for us here at Fair Wind Fasteners. Made of 316 Stainless Steel to look beautiful and prevent corrosion, these 316ss CSK washers are the perfect finishing touch for your woodworking and boatbuilding projects. Say goodbye to the frustration of split stock caused by standard screws, and goodbye to worn our screw holes on panels or hatches that are regularly removed for access. Our washers prevent this issue, and leave a meticulous "finished" look on any project. It's little details like these washers that set a good job apart from a great job.

Not only do these washers prevent splitting, but they also create a smooth, finished look that will leave your project looking pristine. The combination of washer and screw applies force like a pan or round head screw, but is counterbored to a flush position. The screw head and exposed washer rim will be at the same level, resulting in a seamless finish.

These washers are a game-changer for renovations, external trim repairs, and fine furniture. They allow you to pull warped trim or planking into place with long screws without worrying about the countersunk head of your screw splitting the timber. 

When used on access hatches or a cabin sole, the hatch can be unscrewed and then re-fastened without wearing out the surrounding timber.

Flush Fit Stainless Washers

We recommend using a forstner bit or brad-point drill for the counterbore hole to ensure a clean finish with no tear-out, and the recommended bit sizes are below.

Specially manufactured for us here at Fair Wind Fasteners, these 316 stainless flush mount countersunk washers are perfect for adding that finishing touch to your project.

We also have these available in Silicon Bronze!

Works with any standard Flat or Oval head fully threaded stainless screws with 82° countersink heads.


316ss Countersunk Flush Washer Dimensions



#6 #6 5/16" 0.306" (~5/16") 0.154" (5/32") 0.122" (1/8")
#8 #8 3/8" 0.367" (~3/8") 0.187" (3/16") 0.156" (5/32")
#10 #10 7/16" 0.432" (~7/16") 0.216" (7/32") 0.156" (5/32")
#12 #12 15/32" 0.473" (~15/32") 0.244" (31/128") 0.168" (11/64")
#14  #14 or 1/4" 17/32" 0.543" (~17/32") 0.269" (17/64") 0.200" (13/64")

Customer Reviews

Based on 3 reviews
These flush countersink washers are absolutely awesome!!!

These washers are fantastic. I purchased 15 in stainless steel and had a special job where I only needed three, but they worked perfectly for my application. At some point I plan to purchase the larger quantities in all sizes just to have them in hand in my shop. Thank you so much Rob!

Jesse Methner
Stainless counter sunk flush washers

These washers are great. They are good quality and add a nice look over standard finish washers.

Ryan Loiselle
316 Stainless Flush Countersunk Washers

Great product!! Met all expectations. Thanks Rob!!