Manufacturer Part Number: FBFLWASH12SODP1|Washer Type|Flat WasherMaterial|Stainless SteelMaterial Grade|Screw Size|Thread Size|1/2"Inside Diameter (Inch)|Inside Diameter (Decimal Inch)|Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|Thickness (Inch)|Thickness (Decimal Inch - 4 Decimals)|Standards|ANSI B18.21.1Finish Coating|Fastener Standard|Military Specification|System Of Measurement|Additional Information|NL-19® Surface Treatment, Made in the USAProduct Service Code|UNSPSC Code|31161807