Eekanna nja, iyẹn, eekanna simenti.
Eekanna eekanna, ti a mọ nigbagbogbo bi eekanna irin, jẹ iru eekanna, lilo iṣelọpọ irin carbon, ohun elo ni irin 45 tabi irin 60, lẹhin iyaworan, annealing, ṣiṣe eekanna, quenching ati awọn ilana miiran, nitorinaa sojurigindin jẹ lile.Awọn oniwe-iṣẹ ni lati àlàfo ni diẹ ninu awọn lile miiran eekanna ko le àlàfo lori ohun, nitori awọn ohun elo ati ki o lasan eekanna yatọ gidigidi, jẹ pataki kan àlàfo.Lile ti eekanna nja jẹ nla pupọ, nipọn ati kukuru, ati agbara lati punch lagbara pupọ.
Isọri: eekanna eekanna ni ọpọlọpọ awọn eekanna eekanna, grooved, twill, ajija, oparun, ati bẹbẹ lọ, gbogbogbo wọpọ jẹ shank grooved tabi sisun sisun.
Ni ibamu si awọn ti o yatọ classification, nja eekanna le tun ti wa ni pin si: galvanized nja eekanna, dudu nja eekanna, blue nja eekanna, awọ nja eekanna, countersunk nja eekanna, K-word npa eekanna, T-word npa eekanna ati be be lo.