ASME B18.2.4.2M M16 Hexagon Nuts 

MASME B18.2.4.2M M16 Hexagon Nuts Best Price Carbon Steel Hex nuts AssortmentCarbon Steel Hex nuts ASME  B18.2.4.2M Hexagon Nut Standard: B18.2.4.2M ISO 4033 ISO 8674  Thread Size: M5-M36 Class: ST-8/10/12/ A2-70/A4-80 Material: Stainless Steel / Carbon Steel Surface Treatment: Plain / Zinc Plated / VZD / ZSML / Zinc-Nickel /ZNBHL / ZNSHL / E2J / ZFSHL / ZFSHR / Delta-Tone / HDG / TZN