/ Precision Measuring Tools / Precision Hand Tools / Precision Shop Tools / Surface Gages / 257A * Not actual product image 51240 257A Full-sized Surface Gage 51240 Other similar products 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. 9" Spindle. Features Specifications Parts Contact Starrett Features Finest full-size surface gage Stable steel base is fully hardened, ground and nicely finished Four frictionally held gage pins that add versatility for referencing the tool Specifications Spindle Length (in): 9" Spindle Length (mm): 225mm Base Size (in): 2-7/8 x 2-3/8" Base Size (mm): 72 x 60mm Parts Member of Kit Item #DescriptionPart No.QtyInformation 1BASE #257-918013-01 2SLEEVE, SPINDLE COMP07800-A1 3•BOLT, SPINDLE #57-907800-01 4•WSHR,.188X.682X.18701847-01 5•WSHR,.157X.432X.06201882-01 6•SPRING, .178X.248X.500X.035X401859-01 7•NUT, .157-4001873-01 8SCRIBERPT165891 9SPINDLE, #57APT991221 10•SPINDLE, 9"01834-01 11•SCREW, .140-40 SLOT X .281 LONG01883-01 12PIN, BASE GUIDEPT018774 13ROCKER18009-01 14SPRING, .205X.291X.875X.043X701869-02 15SCREW, .157-40 THUMB X .750 LONG08254-01 16ROC FULCRUM, .312-4018011-01 17WSHR,.188X.437X.03118012-01 18SNUG ASSEMBLYPT187181 19•SLEEVE, SCRIBER18722-01 20•SNUG,SCRIBER18720-01 21•BOLT, SCRIBER #5718721-01 22•NUT, .187-3201854-01 23•WSHR,.187X.471X.05018723-01 24•SPRING, .259X.315X.313X.028X301875-01