/ Precision Measuring Tools / Precision Hand Tools / Precision Shop Tools / Surface Gages / 257C * Not actual product image 51242 257C Full-sized Surface Gage 51242 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. 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): 12" Spindle Length (mm): 300mm Base Size (in): 3-1/2 x 3-3/16" Base Size (mm): 90 x 80mm Parts Member of Kit Item #DescriptionPart No.QtyInformation 1BASE #257-1218014-01 2SPINDLE, #57CPT991241 3•SPINDLE, 12"01837-01 4•SCREW, .140-40 SLOT X .281 LONG01883-01 5BOLT/SLEEVE, SPINDLE07801-01 6WSHR,.219X.744X.25001848-01 7WSHR,.202X.558X.06201882-1/21 8SPRING, .238X.324X.500X.043X401860-01 9NUT, .200-4001874-01 10SCRIBERPT165901 11ROCKER18010-01 12SPRING, .247X.357X1.00X.055X801870-02 13SCREW, .200-40 THUMB X .875 LONGPT082511 14ROC FULCRUM, .375-4018019-01 15PIN, BASE GUIDEPT018784 16WSHR,.250X.500X.03118018-01 17SNUG ASSEMBLYPT187241 18•SNUG,SCRIBER18726-01 19•BOLT, SCRIBER #5718721-01 20•SLEEVE, SCRIBER18722-01 21•WSHR,.187X.471X.05018723-01 22•SPRING, .259X.315X.313X.028X301875-01 23•NUT, .187-3201854-01