Detail & Specs
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Metric Countersunk Cup Finish Washer, Black Stainless Steel
Full Body Solid Turned Form
Countersunk finish washers have a 90 degree seat. Once installed, these washers sit proud of the work surface, creating a professional, smooth finish that discourages snagging or catching.
These washers are meant to be used with screws and bolts that have a countersunk 90 degree head: socket flat, Phillips flat, slotted flat, etc.
Can be used with machine thread, sheet metal thread and wood thread screws. Also known as countersunk washer, machined cupped finishing washer, rosette washer
Material: Stainless Steel
Suitable for damp locations
Corrosion resistant
Finish: Black Oxide
Attractive matte black finish
Abrasion resistant, does not peel, chip or rub off
Reduces friction, prevents galling
Does not change the strength of the stainless steel
Practically no dimensional change to base fastener
The black oxide coating per MIL-DTL-13924, Class 4 on 300 series corrosion resistant steel will show no signs of corrosion after 96 hours of exposure in a 5% salt spray (fog) test in accordance with ASTM B117.
Specification
AFNOR NFE 27-619 French National Standard
Stainless steel washers are commonly used in damp environments. They are popular across a wide range of industries: automotive, agriculture, architectural, sanitation, food processing, clean energy, etc.