800 Series MS Flat Washers (Military Standard)

What is an 800 series MS washer?

Military Standard washers in the 800 series are specified by MS drawing number on defense and aerospace assemblies, guaranteeing the dimensions, finish, material, and performance that mission-critical work requires. The 800 series covers a range of flat washer sizes matched to common bolt diameters, and MS numbers frequently relate to AN and NAS parts as standards are superseded over time. Made from 18-8 stainless, these washers add corrosion resistance for military hardware exposed to weather and harsh conditions. Where a drawing calls for an 800 series MS part number, use the certified MS washer rather than a commercial equivalent.

Why choose 800 series MS flat washers

• Military standard: manufactured to 800-series MS specifications.
• Certified conformance: called out by MS part number on drawings.
• Corrosion resistant: 18-8 stainless resists rust and oxidation.
• Repeatable: consistent dimensions for critical assemblies.

Common applications for 800 series MS flat washers

• Military vehicles and equipment
• Aerospace and defense assemblies
• Government and contractor programs
• Any drawing specifying an 800 series MS part number

For related standards, see NAS aerospace flat washers and 900 series AN flat washers, and browse every option on the main flat washers category.

800 Series MS Flat Washers FAQ

What does MS stand for?

Military Standard, one of the primary military and aerospace standard families along with AN (Aeronautical Standard) and NAS (National Aerospace Standard).

What is the 800 series?

The 800 series is the range of MS part numbers covering these flat washer sizes, matched to common bolt diameters and called out by number on drawings.

Are MS washers interchangeable with AN and NAS?

Many MS numbers relate to AN and NAS parts as standards are superseded, but always follow the specific part number called out on your drawing.