Xinxiang Bashan nut Ltd., affiliatedto China Aviation Industry Corporation SIA Group Bashan(state-owned No.540 Factory),has more than 50 years,since the company has been focused on since the construction ofwire thread insert, metal wire, filters and development andproduction of deep-processed products, is the first to participatein the development and production of wire thread insert, filterproducts, large state-owned military enterprises, is the currentdomestic production of wire thread insert, filter productstechnical capabilities of the strongest, most completespecifications, best quality and largest specialized manufacturers,is the military wire thread insert, designated units filter, alsowire thread insert National Military Standard( GJB119.1A~ GJB119.4A-2001 ,GJB5107~ 5110-2002 ),beacon ( ~5516-1996 HB5513 , HB6200~ 6202-1989 ),filter GB, beacon ( GB/ T5330-2003 ,HB1862-93 )and other technical standards of the main draftingunit.