257A Full-sized Surface Gage 51240

Starrett Surface Gages are designed for a wide variety of uses. This is a basic tool for machinists and toolmakers. The main uses are for accurately scribing lines, transferring measurements and for probing surfaces in inspection work. 9" Spindle.

Contact Starrett


  • Finest full-size surface gage
  • Stable steel base is fully hardened, ground and nicely finished
  • Four frictionally held gage pins that add versatility for referencing the tool


  • Spindle Length (in): 9"
  • Spindle Length (mm): 225mm
  • Base Size (in): 2-7/8 x 2-3/8"
  • Base Size (mm): 72 x 60mm


3D CAD Files / Exploded Parts Diagram

    Login to see related product files. Or create an account.

Product Testimonials

    Write a product review

    California Proposition 65 Warning

      WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov