1) Description: DIN934 2) Type: DIN934,ANSI/ASME,BS,AS 3) Nominal size:6-27 1) Description: DIN9342) Type: DIN934,ANSI/ASME,BS,AS3) Nominal size: M4- M224) Surface: black, yellow zinc, white zinc, white blue zinc, and Dakeluo5) Grade of strength: 4, 6, 86) Materials: SWRCH8A, SWRCH35K, Q195LY, 45#