6 x 5/16 HAMMERDRIVE SS304
Stainless
Also known as U Drive. Often used for attaching nameplates in castings
Diameter = 6 gauge ( 3.5mm )
Thin sheet metal, non ferrous castings, plastics etc
Recommended Hole size = 3.10mm
Cast Iron, Thick Sheet Metal
Recommended Hole size = 3.3mm