Stainless Steel Countersunk Washer Flush Screw Countersunk Washers M6 M8

Description

A Countersunk Washer is a specialized washer with a conical (beveled) underside designed to sit flush in a countersunk hole. It ensures a smooth, flat surface when used with flat-head screws or bolts, preventing protrusion and improving load distribution.

Common Materials

Surface Treatments

Key Applications

Automotive: Flush-mounted fasteners in body panels or interiors.
Aerospace: Lightweight assemblies requiring smooth surfaces.
Furniture: Conceals screws in wood or metal fixtures.
Electronics: Ensures flat mounting for PCBs or enclosures.

Success Case

Challenge:

A leading aerospace manufacturer faced issues with protruding fasteners on aircraft wing panels, causing aerodynamic drag and fuel inefficiency . Traditional washers didn’t provide a flush fit, leading to increased maintenance costs and performance limitations.

Solution:

The company switched to precision-machined aluminum countersunk washers (Type II anodized for corrosion resistance). These washers:
✔ Eliminated surface protrusions , reducing drag by 12% .
✔ Distributed load evenly, preventing stress cracks in composite panels.
✔ Withstood extreme temperatures (-60°C to +150°C) during flight cycles.

Results:

Fuel savings: $220,000 annually per aircraft due to improved aerodynamics.
Maintenance reduction: 30% fewer fastener replacements over 5 years.
Industry adoption: Certified for use in next-gen commercial and military aircraft.