56A Small Surface Gage 50289

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. 4" Spindle, 2" x 1 1/2" Base.

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  • Clamp only
  • The clamp is a strong forging
  • Weighs only ten ounces (.28kg.) and takes up very little space in a toolbox
  • Only 1-3/8" (35mm) high, including the lower sleeve in the rocker arm
  • Scriber has a 3/32" (2.4mm) diameter and is 3-1/4" (82mm) long


  • Spindle Length (in): 4"
  • Spindle Length (mm): 100 & 175mm
  • Base Size (in): 2" x 1-1/2"
  • Base Size (mm): 50 x 38mm


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    10BASE #5607778-01
    20SPINDLE, #56PT991311
    30•SPINDLE, 4"01807-01
    40•SCREW, .125-40 SLOT X .266 LONG01831-01
    50SPINDLE SLEEVE #56PT990851
    60•BOLT, SPINDLE #5607785-01
    90•SPRING, .161X.203X.250X.021X301818-01
    100•NUT, .150-3601825-01
    120SCRIBER SLEEVE #56PT990321
    140•RING, SNUG FRICTION01827-01
    150•BOLT, SCRIBER #5607787-01
    170•SPRING, .116X.148X.156X.016X301826-01
    180•NUT, .110-5201816-01
    200SPRING, .147X.233X.625X.043X601823-01
    210SCREW, .125-40 THUMB X .563 LONG07779-01
    220SCREW, .200-40 SLOT X .439 LONG07781-01
    230SCREW, .157-40 SET X .123 LONG08733-01
    240PIN, BASE GUIDE07782-02
    250SPRING, GUIDE PIN07783-02


    Catalog 33 - Section 17 - Precision Shop Tools

    This section offers quality tools that do not measure, but are needed frequently in manufacturing. Tools such as work positioning tools, scribers, punches, vises and lubricant are an integral part of any shop or manufacturing industry.

    Precision Hand Tools (Catalog 33)

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