There is a newer version of this product available

123-12 Master Vernier Caliper

123, 123M, 123EM Master Vernier Calipers
Master Vernier Slide Caliper, Steel, 0-12"

Caliper, SLC*, without Case 12", .001" Grad Case.

This item is discontinued. Please consider the recommended alternative listed above or contact our special order department at (978) 249-3551 x410 for more information.

Contact Starrett


  • Half as many bar graduations as conventional single-vernier tools
  • Easy to read
  • Machine divided graduations
  • Tight, smoothly fitted slides
  • No glare Starrett satin chrome finish
  • Long 50-division vernier scales
  • Open-face design
  • Screw-type adjusting nut allows for fine measuring adjustments and lock nut holds measurements
  • Fine tool steel construction
  • Hardened, ground and lapped measuring surfaces
  • Divider points on the back side to accurately set dividers and trammels
  • Hardened and stabilized bars


  • Made in America: Yes
  • Range (in): 0-12"
  • Graduations (in): .001"
  • Accuracy (in): +/-.0005" per foot

3D CAD Files / Exploded Parts Diagram

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

Product Testimonials

    Write a product review


      Member of Kit
      Item #DescriptionPart No.QtyInformation
      1BAR #123-12NOT AVAILABLE1
      2JAW, MOVABLE #123-12NOT AVAILABLE (2)1
      4SCREW, .125-40 LOCK X .270 LONGPT130941
      5GIB, SLIDEPT137921
      6SCREW, #5-40 SLOT X .217 LONG24559-04
      7SCREW, .125-40 ADJ. X 1.312 LONGPT130971
      8CARRIER, SLIDE ADJ.13795-01
      9NUT, .125-40PT131001
      10SCREW, .187-50 LOCK X .281 LONGPT131011
      11SHOE, CAR LOCK SCREWPT164951
      14NUT, .125-40PT130981

    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: