GRINDING KIT, VALVE SEAT, ELECTRIC, NO. 6335 NSN 4910 …
STONES-Seat grind-ing stones are general purpose stones with 9/16"-16 thread steel inserts. Use the same stone for roughing and finishing cast iron, soft and alloy valve seats. (For rapid roughing of Stellite faced valve seats, use special 9/16"-16 thread insert stones). Diameter, angle, catalog number and bushing thread size appear on stone ...