Originally Posted by
1000-oaks
^ Really doubt they're cast when all-threaded rolled rod is readily available, extremely strong, relatively inexpensive, and can be feed through a CNC screw machine in 40' lengths. Casting them would increase the fuckery 10X, and there would be a parting line on the inserts unless they were investment cast, which is generally only done for high-quality golf club heads or other $$$ precision items.
Whoever said that was probably trying to "explain" burrs or marks resulting from a dull cutting tool, machine vibration, etc. Turn sloppy machine work (that doesn't hurt anything, so who cares) into an "intentional feature".
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