Trans-Dapt Performance Products differential cover bolts are chome finished, and include washers. Packaged twelve per package.
 
Part # ProductSize Media
9278 5/16"-18 x 3/4" Hex Head Differential Cover Bolts 5/16"-18 x 3/4"
Photo
$8.13
9279 3/8"-16 x 3/4" Hex Head Differential Cover Bolts 3/8"-16 x 3/4"
Photo
$11.41
 
http://hedman.com/images/ePIM/original/9278.jpg
http://hedman.com/images/ePIM/original/9279.jpg