Brand: Automotive Racing Products (ARP)
High-quality steel washers from ARP are a perfect match for ARP SAE Bolt 5-Packs.  They are perfect for installing most accessories or even suspension components. The ID has a chamfer on one side to fit just about any bolt head. Despite their strength, these general-purpose washers should never be used on cylinder head bolts, main cap bolts, or connecting rod bolts. 
This size has a 7/16" nominal ID and a 0.705" OD and measures 0.090" thick (slightly smaller OD and slightly thicker than AN960-716 washers).  The black oxide finish looks tough and takes paint well.  Sold individually.  
Note: These washers are not for use on cylinder heads, main bearing caps, or connecting rods!