BALL ATTACHMENT F/.250INBALL ATTACHMENT F/.250IN 51177, MICROMETER BALL ATTACHMENT, .200" DIAMETER THE STARRETT #247 & #247M SERIES MICROMETER BALL ATTACHMENTS CAN BE EASILY APPLIED BY SNAPPING ON TO END OF EITHER ANVIL OR SPINDLE, THUS PERMITTING TWO ATTACHMENTS TO BE USED TOGETHER. BALLS ARE HARDENED, MEASURE .200" AND 5MM IN DIAMETER, AND MOVE FREELY IN THE RETAINER, INSURING POSITIVE CONTACT WITH ANVIL AND SPINDLE. THE DIAMETERS, .200" OR 5MM, OF EACH BALL USED MUST BE SUBTRACTED FROM THE MICROMETER READING. THE IT IS FOR THE SERIES #216, #231, #436.1, #733, #734, #3734, #1212 AND #1230 MICROMETERS, AND .250" DIAMETER ANVILS AND SPINDLES.
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