TY - BOOK ED - Indian Standards Institution TI - Indian standard specification for black square bolts and nuts (diameter range 6 to 39 mm) and black square screws (diameter range 6 to 24mm) PY - 1968/// CY - New Delhi PB - Indian Standards Institution KW -  Black Square Bolts  KW -  Black Square Nuts KW -  Standards  KW - NASA Thesaurus  N1 - IS 2585 : 1968 ER -