73B-6 Yankee Spring-Type Calipers, Inside, 6" Size and Capacity, Quick-Spring Nut, Flat Leg 50337

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 6". 6" (150mm) with Quick-Spring Nut Caliper size and capacity is 6".

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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  • When the pressure is withdrawn, the nut automatically releases itself, sliding freely over the screw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): 6"
  • Size and Approximate Capacity (mm): 150mm
  • Joint Type: Spring-Type
  • Leg Style: Flat Leg
  • Nut Style: Quick-Spring Nut


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    1LEG, RIGHT #73-618373-02
    2ROD, 150-36 SCREW00091-01
    3STUD, LEFT18367-01
    4CAP, STUD-LEFT18366-01
    5STUD, RIGHT18364-01
    6CAP, STUD-RIGHT18365-01
    7PIN, .062D X .312L18278-0 1
    8BOW #73-600081-01
    9FULCRUM STUD #83-600136-01
    10CAP, SCREW FINISH00034-0 1
    11WSHR,.152X.306X.200, CUP00038-1/21
    12SPRING NUT HEAD S.A.PT000361


    2D Dimensional Drawing (PDF)



    25.65 kb