.312" x .437" HSS Step Drill for Rosan Fastener RCDC28-312 MF0050463
Diameter 1 .312" +.002" / -.000"
Diameter 2 .437"
+.002" / -.000"
Length of Flute 4.250" +/-.125"
Overall Length 5.750" +/-.125"
For Thread Size .375-16