Chrysler V8, Ford 390-428, Buick V6: Includes 20 of 5/16''-18 x 3/4''
Ideal For Tight SpacesSerrations Prevent LooseningFlange Distributes PressureZinc Plated BoltsGrade 5 MaterialEasy Installation
Smaller Than Standard Hex Head is Ideal for Tight Spaces. Integral hex flange head design with under head serrations distribute uniform clamping pressures. Zinc plated grade-5.