... -loose nylok; Used on machinery etc RoHS compliant. Phiilips Countersunk head nylok screw:Item name: nylok screw; Material: stainless steel,iron ... plated,nickel plated,brass plated with nylok;Head Type: pan head,truss head,bind head,flat head,oval head,round head,etc.Standard: JIS,BS,GB,ISO,DIN ...