RIVET NUT-Flat Head, Knurling Body,Open End with extra length We can supply you high-quality product, competitive price and swift delivery! Type: flat head/ thin head/countersunk head circular body/knurled body/full-hex body/half-hex body/open-end/ closed-endSize: Metric thread: M3~M12 Inch Thread: UNC6-32~1/2-13Material: steel, aluminium, stainless steel, brass different special items: