Fits Ford 289, 302, 351C, 351W and AMC 290, 343,360, 390, 401

The special self locking oil pan bolts,use a smaller-than-standard hex head is ideal for tight spaces. Because of the hex flange head design, it will not fall back into the socket wrench, allowing for easier installation. Special under head serrations prevent loosening and the wide flange head distributes uniform clamping pressure for an Ultra gasket seal. Bolts are zinc plated, Grade 5.