Here is the rewritten and improved English version of your content, with added details to reach over 500 characters and presented in a more natural, human-like tone:
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1. **Certification:** ISO, ROHS, SGS
2. **Available Standards:** DIN, ANSI, ASTM, JIS, BSW
3. **Strength Grades:** 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, A4-80
4. **Finishing Options:** Yellow Zinc Plated, Blue Zinc Plated, White Zinc Plated, Galvanized, HDG, Chromate, Dacromet
5. **Material Options:** Carbon Steel, Stainless Steel (SS304, SS316), A2, A4
6. **Size Range:** M2 to M100, Length: 5-300mm, MOQ: 500 pcs, Port: Shenzhen or Shanghai
7. **Packing Options:** Plastic Bags + Chipboard Boxes
Production Show
Company Show
Packing Details
Certification
FAQ
**Q: Are you a trading company or manufacturer?**
**A:** We are a direct manufacturer with OEM capabilities available.
**Q: What is your delivery time?**
**A:** Typically 7–10 days if in stock, or 15–20 days if not in stock, depending on order quantity.
**Q: Do you offer samples? Are they free?**
**A:** Yes, we can provide free samples, but shipping costs are not included.
**Q: What are your payment terms?**
**A:** 30% T/T in advance, balance before shipment, or L/C.
If you have any other questions, feel free to contact us via the following channels: [Insert Contact Information]
- Model No.: DIN7991
- Type: Countersunk Head Bolt
- Connection: Standard Bolt
- Standards: DIN, GB, ANSI, JIS
- Certifications: ISO, RoHS, SGS
- Available Materials: Stainless Steel, Carbon Steel
- Brand: JR
- Specifications: M3 to M24
- HS Code: 3917400000
- Material: Carbon Steel
- Groove Type: Hexagon
- Head Style: Countersunk
- Grade: 10.9
- Available Standards: DIN, ISO, JIS, ANSI, BSW
- Size Range: 3-24mm
- Packaging: Plastic Bag + Carton Box + Wooden Pallet
- Origin: China
1. **Certification:** ISO, ROHS, SGS
2. **Available Standards:** DIN, ANSI, ASTM, JIS, BSW
3. **Strength Grades:** 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, A4-80
4. **Finishing Options:** Yellow Zinc Plated, Blue Zinc Plated, White Zinc Plated, Galvanized, HDG, Chromate, Dacromet
5. **Material Options:** Carbon Steel, Stainless Steel (SS304, SS316), A2, A4
6. **Size Range:** M2 to M100, Length: 5-300mm, MOQ: 500 pcs, Port: Shenzhen or Shanghai
7. **Packing Options:** Plastic Bags + Chipboard Boxes
| Product Name | Grade 10.9 Black Oxide Hex Socket Flat Head Screw (DIN7991) |
| Material | Carbon Steel |
| Color | Black |
| Standard | DIN, GB, ISO, JIS, BA, ANSI |
| Grade | Gr4.8, Gr8.8, Gr9.9, Gr10.9, Gr12.9 |
| Finish | Black Oxide |
| Thread Type | Coarse, Fine |
| Application | Construction Industry, Machinery |
Production Show
Company Show
Packing Details
Certification
FAQ
**Q: Are you a trading company or manufacturer?**
**A:** We are a direct manufacturer with OEM capabilities available.
**Q: What is your delivery time?**
**A:** Typically 7–10 days if in stock, or 15–20 days if not in stock, depending on order quantity.
**Q: Do you offer samples? Are they free?**
**A:** Yes, we can provide free samples, but shipping costs are not included.
**Q: What are your payment terms?**
**A:** 30% T/T in advance, balance before shipment, or L/C.
If you have any other questions, feel free to contact us via the following channels: [Insert Contact Information]
Metal Plate Rolling Machine,Roller Plate,Roller Machine,Hydraulic Metal Plate Rolling Machine
HT-Metalforming Equipment Manufacturing Co.,Ltd , https://www.htmetalforming.com