
TM 9-4910-679-14&P TECHNICAL MANUAL OPERATOR'S ...
Use the same stone for roughing and finishing cast iron, soft and alloy valve seats. (For rapid roughing of Stellite faced valve seats, see catalog for special 9/16"-16 thread insert stones) Diameter, angle, catalog number and bushing thread size appear on stone blotter. Refer to Valve Stone and Pilot Handbook, Form 61094, for the proper size