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12.9 Grade Carbon Steel Metric Coarse Thread Round Head High Strength Bolt and Screw M2-M20 Black Oxide Finish M18 M7
Carbon steel
Black oxide
12.9
M2-M20
From
US$0.01
/ piece
Tier prices are for reference. Final price depends on specification, quantity and destination.
Retail orders: from 10 pcs per item
Wholesale MOQ: 100 piece
Tier pricing
| Quantity | Unit price |
|---|---|
| 100-999 piece | US$0.05 |
| 1000-1999 piece | US$0.03 |
| 2000-4999 piece | US$0.02 |
| ≥ 5000 piece | US$0.01 |
Specifications
| Material | Carbon steel |
|---|---|
| Surface | Black oxide |
| Property class | 12.9 |
| Thread | M2-M20 |
| Size range | M2-M20 |
| 测量系统 | Metric |
| Material | Carbon steel |
| Grade | 8.8级 |
| 螺纹类型 | 粗螺纹 |
| 螺丝头类型 | Hex |
| Surface treatment | 镀镍 |
| Place of origin | China |
| Material | Carton Steel |
| Product name | Tapping Screw |
| Application | Industry |
| Head type | Hex Head |
| Packing | Cartons+plastic Bags |
| Delivery time | 7-15 Working Days |
| Keyword | Small Screws |
| Package | Buyer's Requirement |
| Service | OEM ODM Custom Service |
| Advantage | One-stop Customized Service |
| 销售单位 | 单个商品 |
| 单个包装尺寸 | 33X35X32 厘米 |
| 单个产品毛重 | 50.0 公斤 |
Description
12.9 Grade Carbon Steel Metric Coarse Thread Round Head High Strength Bolt and Screw M2-M20 Black Oxide Finish M18 M7
Material: Carbon steel
Surface: Black oxide
测量系统: Metric
Grade: 8.8级
螺纹类型: 粗螺纹
螺丝头类型: Hex
Place of origin: China
Buying guides
2026-11-07
Stainless fastener grades: 304 vs 316
Corrosion resistance, strength and cost, plus selection advice for outdoor and marine environments.
Read article → 2026-11-07How to choose bolt property class: 8.8, 10.9 and 12.9
Load, preload and cost: when to specify 8.8, 10.9 or 12.9 bolts.
Read article →