Hex Nuts

Standard	Grade/Class	Size Range
ISO 898-2 / ISO 4014	8, 10, 12	1/4″ to 4”
ASTM 453	660 A, B, C & D	1/4″ to 4”
ASTM A563	A, B, C, 8S, DH, 10S	1/4″ to 4” (M12 to M36)
ISO 3506-1	A2-50, A2-70, A2-80	M4 to M64
ISO 3506-1	A4-50, A4-70, A4-80	M4 to M64
DIN 934	–	M4 to M64