Stainless Steel Flange Bolts for 1990-2005 Miata Valve Covers.  Flange bolts have a larger surface that contacts the valve cover, more like the OEM bolts but stainless and a more attractive bolt.  These use a common 10mm hex socket.  Use these superior, corrosion resistant fasteners to replace all 13 bolts on your 1990-2005 Miata - 1.6 or 1.8 engine.  
 
11 long main valve cover bolts
2 short bolts that hold the hard vacuum line on the front of the cover
Small tube of medium strength Loctite