... Stocking-System, Low MOQ, Short Lead Time! Closed End Rivet Nuts Reduce hex head inner-hex body close ... & On Time Lead Time !Type available; Open end ,Sealed End, Flat Head,CSK, Reduce Head Knurled Body and ... provides ease of insertion into the work piece.Sealed End: Waterproof.Metric sizes; Thread SIZE Grip T A ... type of rivet nuts we are supplying: Opend end Flat Head Knurled Rivet NutThread P/N Grip T ...