73B-4 Yankee Spring-Type Calipers, Inside 4" Size and Capacity, Quick-Spring Nut, Flat Leg 50335

Starrett 73 Series "Yankee" Spring-Type Inside Calipers with Flat Legs and Solid 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 4". 4" (100mm) with Quick-Spring Nut Caliper size and capacity is 4".

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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  • When the pressure is withdrawn, the nut automatically releases itself, sliding freely over the screw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): 4"
  • Size and Approximate Capacity (mm): 100mm
  • Joint Type: Spring-Type
  • Leg Style: Flat Leg
  • Nut Style: Quick-Spring Nut


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    1SCREW, INSIDE CALIPER, 125-40 x 2.315 LONG18379-0 1
    2STUD, LEFT18382-01
    3CAP, STUD-LEFT18397-01
    4STUD, RIGHT18380-01
    5CAP, STUD-RIGHT18381-01
    6BOW #73-400079-01
    7FULCRUM STUD #8300135-01
    8CAP, SCREW FINISH00033-0 1
    9WSHR,.125X.245X.162, CUP00038-01
    10SPRING NUT HEAD S.A.00035-01
    11LEG, RIGHT #73-418791-02
    12PIN, .047D X .250L18277-01