640pcs stainless steel hex bolt, nut, and washer set, M3-M4-M5-M6 full thread, grade 8.8/10.9, SUS, A2/A4 marine grade.

Head Style：Hexagonal High-concerned chemical：None Model Number：640pcs DIY Supplies：Metalworking Origin：Mainland China Item Type：Nut & Bolt Sets

Head Style: Hexagonal High-concerned chemical: None Model Number: 640pcs DIY Supplies: Metalworking Origin: Mainland China Item Type: Nut & Bolt Sets