Bolanƙarar bakin ƙarfe suna nufin kusoshin da aka yi da baƙin ƙarfe, gami da ƙarfe SUS201 bolts, bakin ƙarfe SUS304 bolts, bakin ƙarfe SUS316 bolts, da baƙin ƙarfe SUS316L bolts. Matsayi na aiki na bakin karfe bolts, studs da studs sun kasu kashi 10: daga 3.6 zuwa 12.9. Lambar da ke gaban mizanin goma yana wakiltar 1/100 na iyakar ƙarfin ƙarfin ƙarfin abu, kuma lambar bayan tazarar tazarar tana wakiltar ninki 10 na ƙayyadadden yawan amfanin ƙasa da ƙarfin ƙarfin abin hawa na kayan.