Fowler Certified Space-Blox 36 blocks     53-680-050-0

Certificate of Calibration traceable to N.I.S.T.

• Manufactured to meet Federal Specification ASME B89. 1.9 - 2002 tolerances on length for inch gage blocks.

• Tolerances to .00005"

• Ground, hardened and tapped

• 4 connection screws included

• Includes shop hardened fitted case