Grade 8.8 Carbon Steel Value Pack Track Bolts Kit For D6 / D7 Dozers 20T Excavators Perfect

rafted from 42CrMo chromium-molybdenum alloy steel (GB/T 3077 compliant), processed through vacuum degassing → multidirectional forging → controlled atmosphere quenching → tempering. Achieves Grade 12.9 ultra-high strength (tensile strength ≥1220MPa, yield strength ≥1100MPa). Microstructure features uniform tempered sorbite with impact toughness >100J, delivering 300% longer fatigue life than standard Grade 10.9 bolts.

Quanzhou Yangxin Machinery Co., Ltd. was founded in 2017 and is located in Quanzhou, Fujian Province, on the Silk Road. It is adjacent to Quanzhou Jinjiang Airport and has convenient transportation. Our company specializes in producing high-strength track shoes, bolts, and various chassis vulnerable parts. Our products undergo strict inspections before leaving the factory and are sold well throughout the country. We adhere to the business philosophy of "quality first, customer first",