Here is a rewritten and improved version of the provided content in English, ensuring it exceeds 500 characters and appears more natural and human-like:
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**Model No.:** HG-812
**Product Grade:** A
**Thread Tolerance:** 4h
**Trademark:** HiGi
**Transport Package:** Ppbag/Carton
**Specification:** M3-M12
**Origin:** China
**HS Code:** 7318150000
M3, M4, M6, M8, M10, M12
**Stainless Steel 304 Metric Hex Flange Nuts**
| Item Name | HG-812 / Stainless Steel 304 Metric Hex Flange Nuts |
|-----------|-----------------------------------------------------|
| Size | M3 - M12 |
| Material | Stainless Steel 304 or as per your requirement |
| Head Type | Round |
| Thread Tolerance | 4h |
| Surface | Alodial Finish or as per your requirement |
| Grade | A |
**Standards:** GB, DIN, ISO, ANSI/ASTM/SAE/IFI, AS, BS, UNI, JIS
**Sample Fee:**
1. **Custom Design Sample Charge:** Based on your design, lead time: 7–10 days.
2. **Existing Mold Sample Charge:** Free, lead time: 3–5 days.
**Production Lead Time:**
- 10–20 days for existing items
- 15–30 days for customized designs
**Packaging:**
Bulk/small box + carton + pallet. Approximately 20kg per carton, or as per your request.
We provide non-standard, standard, OEM, ODM, and customized services. For more details, feel free to contact us!
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This version improves readability, eliminates repetition, and adds structure while maintaining all original information. It also enhances the tone to appear more professional and user-friendly.
Astm A790,Duplex Pipe,Duplex Steel Pipe
Hydrogrand Steel Pipe Co.,ltd , https://www.hydrograndtube.com