... Steel hex nutSpecification1. Standard: DIN, ANSI B18.2.1and ISO standard. 2. Material: Carbon steel.3. ... Grade of hex nut: Grade 4.8, Grade6.8, Grade8.8, Grade10.9, Grade12.9. Inch standard ... Dimensions: M3-M485. OEM & Customize non-standard products welcome.6. Surface treatment: Plain, black ... M3-M48; 1/4''-1-1/2''Material:Carbon steel, Q195, 35KNut Grade:Class4.8 ...