ARP 434-3202 Water Pump & Thermostat Housing Bolt Kit for Chevrolet LS Gen III/IV. ARP Stainless. 12pt ymm_21 but only if the threads

but only if the threads are rolled after heat-treatment

Specifications Socket Size(s) 3/4 12pt High Performance 180

Special ARP Pro Series NASCAR type stud kits have one of the studs drilled to facilitate sealing the carburetor in the engine by race officials

this set utilizes special insulation to prevent any excess heat from affecting other parts

ARP 434-3202 Water Pump & Thermostat Housing Bolt Kit for Chevrolet LS Gen III/IV. ARP Stainless. 12pt ymm_21 but only if the threadsAvailable in a variety of sizes to suit your needs, all ARP 12 point nuts are constructed from 8740 chrome moly steel or ARP 300 Series stainless steel material, and meet ARPs highest standards of quality. Rated at 180, 000 psi tensile strength, ARP 12 point nuts are manufactured in thick wall versions for optimum strength and rigidity and thin wall versions for applications with limited space requirements. All 8740 chrome moly steel nuts are black