Ningbo Zhongli Bolts Manufacturing Co., Ltd yashinzwe mu 2003, ni uruganda rukora uruganda rukora imashini zifite imbaraga nyinshi mu buryo butandukanye ku buryo butandukanye, rufite ubuso bungana na metero kare 10,000, umurwa mukuru w’amafaranga 1500.000, hamwe na umusaruro wumwaka wa toni 8000 kumwaka. Isosiyete yashizeho amashami menshi yo kugurisha mu ntara zitandukanye mu Bushinwa. Hagati aho, ibicuruzwa by'isosiyete byoherezwa mu Burayi, Amerika, Uburasirazuba bwo hagati, Afurika, Aziya y'Amajyepfo y'Uburasirazuba ndetse no mu tundi turere. Isosiyete ifite ubushobozi bukomeye bwa tekiniki, ibikoresho byuzuye byo kwipimisha hamwe nuburyo butandukanye bwimashini zikoresha imashini zikonje kandi zishyushye, kugirango tuguhe ibicuruzwa byizewe kandi byujuje ubuziranenge. 1, A490, umutwe wa hex DIN931, DIN933, EN14399, DIN6914