excavator bucket,rock bucket,heavy duty buckets,mining bucket,screening bucket,crusher bucket,general purpose buckets Jiangsu Origin Machinery Co., Ltd , https://www.originmachinery.com
**High Strength TC Bolt (Tension Control Bolt)**
A high-strength tension control bolt, also known as a TC bolt, is designed for precise and consistent tightening in structural and mechanical applications. These bolts are manufactured using cold forming, cold forging, or hot forging methods, ensuring superior strength and durability.
Available in sizes ranging from M12 to M52 (1/2" to 2") with lengths from 40mm to 500mm (1-1/4" to 20"), these bolts are ideal for heavy-duty construction and industrial use. The torque control design ensures accurate installation, reducing the risk of under-tightening or over-tightening.
Compliant with JSS II09 standards, the bolts come in grades 8.8S, 10.9S, and 12.9S, offering varying levels of tensile strength, ranging from 830–1030 MPa to 1040–1240 MPa. The torque coefficient is maintained between 0.110 and 0.150, ensuring reliable performance under different conditions.
Surface treatments include black, phosphating and saponification, hot-dip galvanizing, and dacromet, providing corrosion resistance and long-term protection. The size tolerance is ±2.5%, and weight tolerance ranges from -2.5% to +2.5%.
Packaging options include carton boxes with wooden pallets, tin containers with wooden pallets, or custom packaging as per customer requirements.
**Material Composition:**
| Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Chromium (Cr) |
|------------|--------------|----------------|----------------|------------|----------------|
| 0.28–0.50 | 0.13–0.37 | ≥0.57 | ≤0.045 | ≤0.045 | — |
Ningbo S&D Metalwork Co., Ltd. is a leading manufacturer based in China, specializing in threaded rods, bolts, and nuts that meet international standards such as ASTM, ANSI, ISO, and DIN. Custom designs are also welcome.
**Featured Products:**
1. **Threaded Rods & Stud Bolts**
- A193-B7/B7M, ASTM A320-L7/L7M
- SAE J429 Gr. 2/Gr. 5/Gr. 8
- DIN975, DIN976, CL4.8/6.8/8.8/10.9
2. **Bolts**
- Structural Bolts: ASTM A325/A325M, A490, DIN6914
- Hex Bolts: DIN931/DIN933
3. **Nuts**
- Structural Nuts: ASTM A563M, DIN 6915
- Heavy Hex Nuts: ASTM A194 Gr. 2H
- Hex Nuts: DIN934 CL5/6/8/10
**Materials Available:** Carbon Steel, Alloy Steel, SS304/SS316, Brass, etc.
**Surface Treatments:** Plain, Black Finish, ZP, ZY, HDG, etc.
We look forward to working with you and becoming your trusted supplier in China. Let’s build a strong and lasting business relationship together!
Origin Machinery supply technical solutions for mining heavy excavator attachments and rock excavation covers rock drilling, quarrying and breaking and demolition.