Finding left-hand threaded steel inserts in M4 through M10 with a Class 10 grade and oxidation finish? Shenzhen Xuefang Technology Co., Ltd. lists such plum-shaped nuts under brand YB, covering the metric range with model number M8. Unit price starts at…
At a Glance
- Thread direction: Left hand (as listed)
- Grade: Class 10
- Nut shape: Plum-shaped; body type round
- Finish: Oxidation
- Sizes: M4, M5, M6, M8, M10 (model number M8)
- Applications listed: Heavy industry, water treatment, retail, general industry, automotive, rail transit, car manufacturing
- Packaging: Single item, 15×10×5 cm, 0.1 kg per unit
- Price range: US$ 0.01 – 0.10
Product Description
Shenzhen Xuefang Technology Co., Ltd. offers a line of threaded inserts under the product name "Threaded Inserts Manufacturer - M4 M5 M6 M8 M10 Steel Plum Nuts." The listing identifies these as steel plum nuts with a left-hand thread direction and a Class 10 grade. The finish is specified as oxidation, and the body type is round. The brand is YB, and the model number is M8, covering the metric size range M4 through M10. The origin is listed as China.
A summary of the discrete attributes from the listing follows:
| Parameter | Value |
|---|---|
| Measurement system | Imperial (Inch) |
| Grade | Class 10 |
| Nut shape | Plum-shaped |
| Thread direction | Left hand |
| Finish | Oxidation |
| Application | Heavy Industry, Water Treatment, Retail Industry, General Industry, Automotive Industry, Rail Transit Equipment Manufacturing, Car Manufacturing |
| Body type | Round |
| Place of origin | China |
| Brand name | YB |
| Model number | M8 |
| Nut type | Tube nut, spring clip |
| Selling units | Single item |
| Single package size | 15×10×5 cm |
| Single gross weight | 0.100 kg |
For buyers evaluating this listing, several listed attributes stand out:
- Left-hand thread direction suits applications where reverse tightening is required to prevent loosening under specific rotational loads.
- Class 10 grade indicates a high-strength steel classification, though no proof load or material standard is specified in the listing.
- The plum-shaped nut profile may offer multi-point engagement for installation or removal tooling.
- Oxidation finish provides a basic surface treatment; no salt-spray or corrosion resistance data is provided.
- Pricing starts at US$0.01 per unit, with a maximum listed at US$0.10, which positions this as a high-volume commodity fastener.
Installation & Operation Notes
Because the thread direction is listed as left hand, installation torque must be applied counterclockwise to tighten. Buyers should verify with Shenzhen Xuefang Technology whether the full M4–M10 range is indeed left-hand or if mixed thread directions are available. The absence of a right-hand option in the attribute set is a critical configuration decision for assembly lines using standard right-hand drivers.
The Class 10 grade suggests a heat-treated steel, but the listing does not specify the material standard (e.g., ISO 898, SAE J995) or proof load. Engineers should request a material certificate and mechanical property sheet before specifying these nuts in load-bearing joints. The oxidation finish provides minimal corrosion protection; for outdoor or washdown environments, a supplementary coating or plating may be required.
Packaging as single items in 15×10×5 cm boxes weighing 0.1 kg each indicates small-quantity or sample-friendly fulfillment. For production volumes, buyers should confirm bulk packaging options and unit weight tolerance, as the listed weight appears to be nominal.
The plum shape may require a dedicated driver or socket. No tool compatibility data is provided, so end users should confirm driver engagement with the supplier or plan for custom tooling if standard sockets do not seat correctly on the plum profile.
Applications
The supplier lists the following application areas for these threaded inserts:
- Heavy industry
- Water treatment
- Retail industry
- General industry
- Automotive industry
- Rail transit equipment manufacturing
- Car manufacturing
These application categories suggest use in environments where vibration, mechanical stress, or frequent assembly/disassembly may be present. However, the listing does not provide application-specific test data or compliance marks. Buyers in regulated sectors such as rail transit or automotive should obtain supplier documentation regarding material traceability and any applicable standards before approval.
Company Profile

Shenzhen Xuefang Technology Co., Ltd. is a China-based supplier with a catalog that includes nuts as well as watch bands, smart bracelets, and kids' watches. The threaded insert line is marketed under the YB brand. Beyond the listed product attributes, no additional company certifications, production capacity, or quality system details are provided in the listing.
CTA
To obtain full engineering data, thread specifications for each size, material certificates, bulk pricing, and packaging options, contact Shenzhen Xuefang Technology Co., Ltd. directly through the platform inquiry system. When requesting a quote, specify thread direction, grade, finish, and required quantities for each metric size from M4 through M10.

Disclaimer

All specifications in this memo are reproduced from the supplier's product listing and have not been independently verified. Final engineering approval should be based on supplier-confirmed data, including material standards, dimensional tolerances, and test results for the intended application.
Related product: Threaded Inserts Manufacturer - M4 M5 M6 M8 M10 Steel Plum Nuts