12 Sets of 8-Grade Hardness Bolt Kits, 12 12-5/8 "x 2" Bolts, 12 12-5/8 "Nuts (with self-Locking Buckles), and 24 Flat washers.

12 American grade 8 bolts, size 5/8 inches x 2 inches, tensile strength 1034 MPa, yield strength 896MPa, heat treatment (hardness range): HRC 29-35 | 12 American grade 8 screws and nuts, size 5/8 inch x 2 inches, tensile strength 1034 MPa, yield strength 896MPa, heat treatment (hardness range): HRC 29-35. | The nut has self-locking, which can effectively prevent loosening. Don't worry about it coming off after being locked. | The bolt kit is made of high-strength alloy steel material, which is wear-resistant and durable, greatly extending its service life. There is no need to worry about long-term wear and tear leading to a short service life. | Standard size, can replace most bolts in the market, attached with size specifications, can be purchased according to reference.