/ Precision Measuring Tools / Precision Hand Tools / Micrometers / Micrometer Accessories / 247MA * Not actual product image 51179 247MA Micrometer Ball Attachment, 5mm Diameter Balls 51179 Other similar products For 2M and 230M Micrometers and 263M Micrometer Heads, 6mm diameter Anvil and Spindle 6mm Diameter Anvils. Features Specifications Contact Starrett Features Easily applied by snapping on to end of either anvil or spindle, thus permitting two attachments to be used together Balls are hardened, measure 5mm in diameter, and move freely in the retainer, insuring positive contact with anvil and spindle Specifications : Diameter: .200" (5mm) Fits Starrett Series: For 2M and 230M Micrometers and 263M Micrometer Heads, 6mm diameter Anvil and Spindle