Amazon.com: Aluminum Flat Head M8 Rivet Nut Rivnut Insert Nutsert 8mm (Pack of 25) : Industrial & Scientific
Flat Reduce Hex Head Reduced Round Plain Close Open End Semi-Hex Knurled Inner-Hex Body Steel SS304 Ss 316 Aluminum M8 M10 Insert Rivnut Rivet Nut Nutsert - China M4 M5 M6, M8