uxcell 1/4 Inch Thread Dia Insert Nutsert Metal Rivet Nut 50pcs Thread Size: 1/4"; Product Name: Rivet Nut; Material: Metal Weight: 189g; Package Content: 50(+/-2%) x Rivet Nut Main Color: Bronze Tone; Height: 15mm/ 0.6" Battery Included: No; Head Diameter: 13 x 7mm/ 0.5" x 0.27"(Outer.D*Inner.D) Head Thickness: 1.4mm/ 0.055"; Outer Knurling Size: 9 x 7mm/ 0.35" x 0.28"(D*L)