2-4.5 Hex Jam Nut Zinc (Pack Qty 10) BC-200NJ by Shorpioen

Jam nuts are tightened against the work surface and a finished or heavy hex nut is tightened against the jam nut to keep it from loosening | Low Carbon: Nuts shall be made from a low carbon steel which conforms to the following chemical composition requirements Carbon: 0.47% maximum; Phosphorus: 0.12% maximum; Sulfur: 0.23% maximum. | Grade-5: Nuts shall be made from a medium carbon steel which conforms to the following chemical composition requirements Carbon: 0.55% maximum; Manganese: 0.30% minimum; Phosphorus: 0.05% maximum; Sulfur: 0.15% maximum. | Stainless: Nuts shall be made from one of the following austenitic alloys: 303, 303Se, 304, XM7, all of which have a chromium content of 18% and a nickel content of 8%.