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High-Strength 12.9 Grade Black Flat Head Bolt 25mm Countersunk Hexagon Socket Screw M2M3M4M5M6M8M10M12 with Black Oxide Plating
Stainless steel
Black oxide
12.9
M2
From
US$0.03
/ piece
Tier prices are for reference. Final price depends on specification, quantity and destination.
Retail orders: from 10 pcs per item
Wholesale MOQ: 50 piece
Tier pricing
| Quantity | Unit price |
|---|---|
| 50-999 piece | US$0.07 |
| 1000-4999 piece | US$0.06 |
| 5000-9999 piece | US$0.05 |
| ≥ 10000 piece | US$0.03 |
Specifications
| Material | Stainless steel |
|---|---|
| Surface | Black oxide |
| Property class | 12.9 |
| Thread | M2 |
| Size range | M2 |
| Length range | 25mm |
| Material | Carbon steel |
| Grade | 8.8级 |
| 螺纹类型 | UNC |
| 头部类型 | 圆形 |
| Surface treatment | 黑氧化物 |
| 每个螺栓的螺母 | 0 |
| Place of origin | Hebei, China |
| Brand | JunChuang Fastener |
| Material | Carbon Steel |
| Application | Building |
| Finish | Black Coating |
| 销售单位 | 单个商品 |
| 单个包装尺寸 | 57X54X53 厘米 |
| 单个产品毛重 | 52.0 公斤 |
Description
High-Strength 12.9 Grade Black Flat Head Bolt 25mm Countersunk Hexagon Socket Screw M2M3M4M5M6M8M10M12 with Black Oxide Plating
Material: Stainless steel
Surface: Black oxide
Grade: 8.8级
螺纹类型: UNC
头部类型: 圆形
每个螺栓的螺母: 0
Place of origin: Hebei, China
Brand: JunChuang Fastener
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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 →