Thermostat Housing Bolt Kit, 12-Point Head S/S fits SB/BB Chev 5/16-24 Thread x 1.000/2.000" UHL

These Premium Grade Bolts Are Engineered To Properly Engage The Manifold Threads And Resist Loosening. They Are Application-specific, And Come In Black Oxide Finished Or Rust-proof Stainless Steel, With Handy 12-point Or Standard Hex Heads. Washers Included.