... : ASTM A194 Gr.2H Heavy Hex Nuts Material: C1035; C1045 Carbon SteelSize: M3-M64Thread: M, UNC, UNF, UNEF, BSW Specification: ASTM A194 Gr.2H/ Gr.2HMStandard ... : DIN, ASME, ASTM, ANSI, IFI, etc.Please send your specific enquiry ... .For more details, please don't hesitate to contact us. ASTM A194 Gr.2H Heavy Hex Nuts