/ Precision Measuring Tools / Precision Hand Tools / Precision Shop Tools / Surface Gages / 257B * Not actual product image 51241 257B Full-sized Surface Gage 51241 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. (2) 9"/12" 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" & 12" Spindle Length (mm): 225 & 300mm 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 12SPINDLE, #57BPT991231 13•SPINDLE, 12"01835-01 14•SCREW, .140-40 SLOT X .281 LONG01883-01 15PIN, BASE GUIDEPT018774 16ROCKER18009-01 17SPRING, .205X.291X.875X.043X701869-02 18SCREW, .157-40 THUMB X .750 LONG08254-01 19ROC FULCRUM, .312-4018011-01 20WSHR,.188X.437X.03118012-01 21SNUG ASSEMBLYPT187181 22•SLEEVE, SCRIBER18722-01 23•SNUG,SCRIBER18720-01 24•BOLT, SCRIBER #5718721-01 25•NUT, .187-3201854-01 26•WSHR,.187X.471X.05018723-01 27•SPRING, .259X.315X.313X.028X301875-01