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China Square Nut Suppliers - Precision Machined Carbon Steel Class 4, 6, 8, M8, M10, M12, M27 Factory Products
Square Nut Carbon Steel Class 4 6 8 M8 M10 M12 M27 Square Nut
| Standard | DIN, ASME, ASTM, JIS |
| Material | Carbon Steel, Alloy Steel, Stainless Steel |
| Grade | 5 / 8 / 10 |
| Size | M5 – M64 |
| Thread | M, UNC, UNF, BSW |
| Finish | Zinc Plated ( Clear/Blue/Yellow/Black ), Black Oxide, Nickel, Chrome, HDG. |
| MOQ | 1000PCS |
| Delivery Term | FCA, FOB, CNF, CIF, CIP, DDU |
| Payment Term | T/T or L/C |
Product Advantages
Precision Machining
Measure and process using precision machine tools and measuring tools under strictly controlled environmental conditions.
High-quality Carbon Steel (35#/45#)
With long life, low heat generation, high hardness, high rigidity, low noise, high wear resistance and other characteristics.
Cost-effective
The use of high-quality carbon steel steel, after precision processing and forming, greatly improves the user experience.
Surface Treatment
ZINC
Electro-galvanizing is a traditional metal coating treatment technology that provides basic corrosion resistance to metal surfaces. The main advantages are good solderability and suitable contact resistance. Due to its good lubrication properties, cadmium plating is commonly used in aviation, aerospace, marine, and radio and electronic products. The plating layer protects the steel substrate from both mechanical and chemical protection, so its corrosion resistance is much better than zinc plating.
Parameter of Product
DIN 557 STANDARD
Frequently Asked Questions
What standards do these square nuts comply with?
Our square nuts are manufactured in accordance with international standards including DIN (such as DIN 557), ASME, ASTM, and JIS.
What materials and grades are available?
We offer these square nuts in Carbon Steel (such as 35# and 45#), Alloy Steel, and Stainless Steel. Available grades include Grade 5, Grade 8, and Grade 10 (Class 4, 6, 8).
What sizes and thread types do you supply?
We provide a wide range of sizes from M5 up to M64. Available thread types include M, UNC, UNF, and BSW.
What surface treatment options are available?
We offer multiple finish options, including Zinc Plated (Clear, Blue, Yellow, or Black), Black Oxide, Nickel plating, Chrome plating, and Hot Dip Galvanizing (HDG) to meet different corrosion resistance needs.
What is the MOQ and what are your delivery terms?
Our Minimum Order Quantity (MOQ) is 1000 pieces. We support various delivery terms including FCA, FOB, CNF, CIF, CIP, and DDU.

















