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| Customization: | Available |
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| Material: | Stainless Steel |
| Type: | Square Head |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Stainless Steel Square Nut | |
| Material: | Carbon Steel, Stainless Steel, Brass etc. |
| Standards: | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS, ETC |
| Size: | M5-M20 or non-standard asa request & design |
| Finish: | Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc. |
| Grade: | A2-70, A4-70, A4-80, 4.8, 8.8, 10.9, 12.9 |
| Thread Size d |
M5 | M6 | M8 | M10 SW16 |
M10 | M12 SW18 |
M12 | M16 | |
| P | Pitch | 0.8 | 1 | 1.25 | 1.5 | 1.5 | 1.75 | 1.75 | 2 |
| dw | min | 6.7 | 8.7 | 11.5 | 14.5 | 15.5 | 16.5 | 17.2 | 22 |
| e | max | 11.3 | 14.1 | 18.4 | 22.6 | 24 | 25.4 | 26.9 | 33.9 |
| min | 9.93 | 12.53 | 16.34 | 20.24 | 21.54 | 22.84 | 24.02 | 30.11 | |
| m | max=nominal size | 4 | 5 | 6.5 | 8 | 8 | 10 | 10 | l3 |
| min | 3.52 | 4.52 | 5.92 | 7.42 | 7.42 | 9.42 | 9.42 | 12.3 | |
| m1 | min | 2.5 | 3.2 | 4.1 | 5.2 | 5.2 | 6.6 | 6.6 | 8.6 |
| s | max=nominal size | 8 | 10 | 13 | 16 | 17 | 18 | 19 | 24 |
| min | 7.64 | 9.64 | 12.57 | 15.57 | 16.57 | 17.57 | 18.48 | 23.16 | |
| per 1000 units ≈ kg | 1.31 | 2.77 | 5.5 | 10.7 | 13 | 16.3 | 19.1 | 38.2 | |








| Q1: What thread standards do you follow? |
| A1: Our screws comply with DIN, ISO, ANSI, and JIS standards, and can also be customized according to customer drawings. |
| Q2: What types of nuts do you manufacture? |
| A2: We supply a full range of nuts including hex nuts, flange nuts, lock nuts, nylon-insert nuts, square nuts, cap nuts, weld nuts, T-nuts, wing nuts, and non-standard custom nuts. |
| Q3: Do you provide samples before mass production? |
| A3: Yes, we offer free or low-cost samples for quality and dimension confirmation prior to order. |
| Q4: How do you control product quality? |
| A4: Every batch is tested for torque, hardness, thread precision, and salt spray corrosion resistance, following ISO 9001 quality system standards. |
| Q5: Do you offer OEM or customized production? |
| A5: Yes. We can produce screws according to samples, technical drawings, or specific drive/head combinations, and offer custom packaging and labeling. |
| Q6: What is the difference between A2 and A4 stainless steel bolts? |
| A6: A2 (304) is ideal for standard outdoor and industrial use, while A4 (316) contains molybdenum, offering higher corrosion resistance for marine, chemical, and salt-spray environments. |
| Q7: Do you provide matched nut & bolt or nut & washer kits? |
| A7: Yes. We can supply pre-packed sets or assembly kits customized for distributors or hardware chains. |