... , ANSI4.Certificate: ISO9001:2008Carbon Steel hex nutSpecification1. Standard: DIN, ANSI B18.2.1and ISO standard. 2. Material: Carbon steel.3. Grade of ... Grade6.8, Grade8.8, Grade10.9, Grade12.9. Inch standard: Grade2, Grade5.4. Dimensions: M3-M485. OEM & Customize non ... -standard products welcome.6. Surface treatment: Plain, black finished, Zinc ...