Description
- For 66-67 Corvette’s w/ AC (Option C60).
- “WB” bolt is 5/16-18 x 3/4″ with no bars (GM Grade 260).
- The “RBW” bolt is 5/16-18 x 5/8″ with an integral flat washer.
- The head on this bolt has 3 circles and 3 bars.
- All 3 bars are horizontal which is GM’s marks for a grade 275 bolt.
- Sale is for 1 of each bolt above (2 bolts total).







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