73B-12 Yankee Spring-Type Calipers, Inside, 12" Size and Capacity, Quick-Spring Nut, Flat Leg 50343

Starrett 73 Series "Yankee" Spring-Type Inside Calipers with Flat Legs and Quick-Spring Nut are made from a high-grade steel and well-finished. The legs are made of flat stock and are very durable. Calipers feature a hardened fulcrum stud, strong and flexible bow string, and centrally located leg adjustment to assure smooth action. Caliper size and capacity is 12". 12" (300mm) with Quick-Spring Nut Caliper size and capacity is 12".

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  • Starrett Yankee Calipers and Dividers are made from a high-grade steel and well-finished
  • The bow spring, although flexible, is exceedingly strong to assure reliability
  • All sizes are available with either spring nut or solid nut
  • The Starrett quick-adjusting automatic-closing spring nut is designed for making fast, positive adjustments
  • Fulcrum stud is hardened and has a smooth bearing surface
  • The legs are made of flat stock and are very durable
  • The threads of the nut firmly engage the screw at the slightest pressure from the leg
  • When the pressure is withdrawn, the nut automatically releases itself, sliding freely over the screw


  • Type: Inside
  • Size and Approximate Capacity (in): 12"
  • Size and Approximate Capacity (mm): 300mm
  • Joint Type: Spring-Type
  • Leg Style: Flat Leg
  • Nut Style: Quick-Spring Nut


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    10LEG, RIGHT INSIDE #73-1200006-BR2
    20STUD, LEFT18714-01
    30CAP, STUD-LEFT18715-01
    40STUD, RIGHT18712-01
    50CAP, STUD-RIGHT18713-01
    60BOW #73-800082-01
    70CAP, SCREW FINISH00034-1/21
    80WSHR,.196X.370X.237, CUP00038-3/41
    90SPRING NUT HEAD S.A.00037-01
    100PIN, .063X.37518716-01
    110ROD, .190-26 SCREW00092-E1
    120FULCRUM STUD #83-800086-01


    Catalog 33 - Section 14 - Calipers, Dividers, and Trammels

    Manufacturing calipers and dividers since about 1890, we continue to build them with the same level of quality today. Even with many more options available today, these tools are still the best choice for many measurement transfer, scribing and other jobs. We also offer trammel heads, divider points and attachments.

    Precision Hand Tools (Catalog 33)

    612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.