Mr. Gasket 5000 Chevy Small Block Chrome Hex Bolt Kit Complete Engine Bolt Kits ideal for street rods street machines or any vehicle requiring show quality chrome Kits come complete except where noted with AN type washers which have no exposed shoulders part bolt heads to give a very professional appearance Bolt heads of these quality fasteners are individually polished to a high luster, then chrome plated for lasting beauty 14 ea 3/8 - inch-16 x 1 - inch Intake & water neck bolts 10 ea 1/4 - inch-20 x 1/2 - inch timing cover bolts 1 ea 3/8 - inch-16 x 2-1/4 - inch water neck bolt Fits early and late water necks 10 ea 1/4 - inch flat washers 14 ea 3/8 - inch AN washers Excellent quality and show durability