Specifications include, but are not limited to: LOT ONE: REGULAR CURVED BLADES / HEAT TREATED • Blades shall be heat treated, through hardened, with a Rockwell hardness of 43 to 55 or a Brinell hardness of 408 to 548, and rated EXTREME SERVICE. • Blades shall be either top or center punched as specified in the order. • Blades shall have the following bolt hole spacing: the first two holes on each end of the blade shall be 3” inches apart; the remaining holes shall be 6” inches apart. Example: (3-3-6-6). • Bolt holes shall be square and countersunk.; LOT TWO: REGULAR FLAT BLADES / HEAT TREATED • Blades shall be heat treated, through hardened, with a Rockwell hardness of 43 to 55 or a Brinell hardness of 408 to 548. • Blades shall be either top punched or center punched, as specified in the order. • Blades shall have the following bolt hole spacing: the first two holes on each end of the blade shall be 3” inches apart; the remaining holes shall be 6” inches apart (3-3-6-6). • Bolt holes shall be square and countersunk.
