The MS20002-12 Washer is a military-standard countersunk aerospace washer designed for flush fastener installations in aircraft structural and mechanical assemblies. It is used with countersunk screws or bolts to provide a smooth surface finish while distributing clamping loads and protecting the underlying structure from wear and deformation.

This washer is commonly applied in aviation environments where aerodynamic smoothness, structural integrity, and clean installation profiles are required. It is supplied in a 100-piece pack for maintenance, repair, and production use.

Its primary features include:
Manufactured to MS20002 aerospace military standards
Countersunk design for flush fastener applications
Used with countersunk screws and bolts
Helps distribute load and reduce surface damage
Suitable for aircraft structural and aerodynamic assemblies
Durable metal construction for aviation environments
Packaged in a 100-piece maintenance set
Compatible with aircraft assembly and overhaul procedures

Washers like the MS20002-12 are widely used in aerospace systems because they help maintain smooth aerodynamic surfaces, improve fastening reliability, and reduce stress concentrations around fastener points in aircraft structures.