Assort, #1 F/W .156OD,.020Thk Stl Blk Ox, Dimensional Standards RoHS Compliant (With Exemption for Lead), Material Steel, Material Grade/Class Case Hardened, Finish Black Oxide, For Screw Size #1, Outside Diameter 5/32 in, Maximum Thickness 1/64 in, System of Measurement Inch, Minimum Thickness 1/64 in