Allied Titanium 0016953, (Pack of 25) #4-40 X 5/8 UNC Socket Head Machine Screw, Grade 2 (CP) #4-40 X 5/8 UNC Socket Head Allied Titanium Machine Screw TRUE TITANIUM(TM) - Stronger, Lighter and Corrosion Free Titanium is good for use in or near saltwater General Tolerance: +0/-0.002 inch Meets ASME B18.3; Grade 2 (CP) Titanium with Polished Finish