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🔧 Seal it right, every time — the copper kit pros trust!
This 300-piece copper sealing ring assortment offers 12 essential metric sizes (M5-M20) crafted from high-quality red copper. Designed for superior temperature resistance, conductivity, and corrosion protection, these flat washers deliver reliable sealing and load distribution across automotive, marine, electrical, and plumbing projects. Neatly organized in a portable case, this kit is a must-have for professionals and DIYers aiming for precision and durability.
| ASIN | B0C61TKSM6 |
| Best Sellers Rank | 9,858 in DIY & Tools ( See Top 100 in DIY & Tools ) 47 in Washers |
| Brand Name | PUTEKCO |
| Colour | Copper |
| Country Of Origin | China |
| Customer Reviews | 4.7 4.7 out of 5 stars (652) |
| Exterior Finish | Copper |
| Fastener Size | M5, M6, M8, M10, M12, M14, M16, M20 |
| Fastener Type | Flat Washer |
| Finish Types | Brushed |
| Item Diameter | 5 Millimetres |
| Item Dimensions | 17 x 9.5 x 2.2 centimetres |
| Item Thickness | 1 Millimetres |
| Manufacturer | taobai |
| Manufacturer Part Number | Tool11 |
| Material Type | Copper |
| Metal | Copper |
| Model Number | Tool11 |
| Number Of Items | 300 |
| Number of Packs | 12 |
| Number of Pieces | 300 |
| Outside Diameter | - Inches |
| Screw Head Style | Flat |
| Set Name | 300 PCS Copper Sealing Rings Assortment Set |
| Size | 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm |
| Thread Size | M5, M6, M8, M10, M12, M14, M16, M20 |
| Unit Count | 300.0 count |
| Washer Compatibility | Metric Bolts |
| Washer Type | Flat |
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