Stainless Countersunk Finishing Washer, #5/16

Finish your installation with a stainless countersunk finishing washer designed for a clean, flush look. This #5/16-size washer is made from 18-8 stainless steel for corrosion resistance in marine environments.

Key Features

• Countersunk finishing washer for a flush, finished appearance
• #5/16 size for the intended fastener application
• 18-8 stainless steel construction for corrosion resistance

Intended Use

• Marine and boat hardware installations requiring countersunk finishing washers
• General fastener mounting where a #5/16 countersunk washer is needed

Product Details

• Product Type: Bulk Fasteners
• Finish/Style: Countersunk finishing washer
• Size: #5/16
• Material: 18-8 stainless steel
• Stainless countersunk finishing washer SKU: 50-00957
• Variant Barcode Note: Barcode is present on the variant data but is not displayed on the customer-facing page
• Weight: 227 grams (variant weight)
• Variant Quantity/Packaging Detail: Catalog sources list Item #00957 as packed 50 per bag and 10 per case (confirm packaging preference against the exact fulfillment unit you require).

Parts Desk Insights

Best Use Case: Use on projects where you want the washer head to sit neatly in a countersunk surface for a more finished look.

Common Issues: Common fitment concerns are typically related to using the wrong countersink geometry (the fastener head/seat should match) and ensuring the washer size matches the fastener size (#5/16 here).

Related Products & Accessories

• Fasteners & Mounting – Browse related fasteners and mounting hardware to pair with this washer.