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| Customization: | Available |
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| Material: | Carbon Steel |
| Type: | Square Head |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Carbon Steel Square Weld Nut | |
| Material: | Carbon Steel, Stainless Steel, Brass etc. |
| Standards: | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS, ETC |
| Size: | M4-M16 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 |
M4 | M5 | M6 | M8 | M10 | 7/16 | 7/16 | M12 | M14 | M16 | |
| P | Coarse Thread | 0.7 | 0.8 | 1 | 1.25 | 1.5 | / | / | 1.75 | 2 | 2 |
| Fine Thread -1 | / | / | / | 1 | 1 | / | / | 1.25 | 1.5 | 1.5 | |
| Fine Thread -2 | / | / | / | / | 1.25 | - | - | 1.5 | - | - | |
| b | Nominal size | 0.8 | 1 | 1.2 | 1.5 | 1.8 | 1.8 | 2 | 2 | 2.5 | 2.5 |
| max | 0.95 | 1.15 | 1.35 | 1.65 | 2 | 2 | 2.2 | 2.2 | 2.7 | 2.7 | |
| min | 0.65 | 0.85 | 1.05 | 1.35 | 1.6 | 1.6 | 1.8 | 1.8 | 2.3 | 2.3 | |
| d1 | min=nominal size (H13) | 5 | 6 | 7.5 | 10 | 12.5 | 12.5 | 13.5 | 13.5 | 16.8 | 18.8 |
| max | 5.18 | 6.18 | 7.72 | 10.22 | 12.77 | 12.77 | 13.77 | 13.77 | 17.07 | 19.13 | |
| d2 | max | 4.2 | 5.25 | 6.3 | 8.4 | 10.5 | 11.7 | 11.7 | 12.6 | 14.7 | 16.8 |
| d3 | min | 6.4 | 8.2 | 9.1 | 12.8 | 15.6 | 15.6 | 17.4 | 17.4 | 20.4 | 22.4 |
| e | min | 9 | 12 | 13 | 18 | 22 | 22 | 25 | 25 | 28 | 32 |
| h1 | Nominal Size | 0.6 | 0.8 | 0.8 | 1 | 1.2 | 1.2 | 1.4 | 1.4 | 1.4 | 1.6 |
| max | 0.7 | 0.9 | 0.9 | 1.1 | 1.3 | 1.3 | 1.5 | 1.5 | 1.5 | 1.7 | |
| min | 0.5 | 0.7 | 0.7 | 0.9 | 1.1 | 1.1 | 1.3 | 1.3 | 1.3 | 1.5 | |
| h2 | min | 0.4 | 0.6 | 0.7 | 1.1 | 1.25 | 1.25 | 1.75 | 1.75 | 1.75 | 2 |
| max | 1.3 | 1.5 | 1.8 | 2 | 2.2 | 2.2 | 3 | 3 | 3.2 | 4 | |
| m | max=nominal size (h13) | 3.5 | 4.2 | 5 | 6.5 | 8 | 9 | 9 | 9.5 | 11 | 13 |
| min | 3.2 | 3.9 | 4.7 | 6.14 | 7.64 | 8.64 | 8.64 | 9.14 | 10.57 | 12.57 | |
| s | max=nominal size (h13) | 7 | 9 | 10 | 14 | 17 | 17 | 19 | 19 | 22 | 24 |
| min | 6.64 | 8.64 | 9.64 | 13.57 | 16.57 | 16.57 | 18.48 | 18.48 | 21.48 | 23.48 | |
| per 1000 units≈kg | 0.81 | 1.7 | 2.4 | 6.5 | 11.3 | 12.5 | 16.5 | 16.5 | 26.7 | 35.8 | |
| Ensure the load(N) | Coarse Thread | 6800 | 11000 | 15500 | 28300 | 44800 | - | - | 65300 | 89700 | 123000 |
| Fine Thread -1 | - | - | - | 30200 | 50200 | - | - | 72100 | 97500 | 132000 | |
| Fine Thread -2 | - | - | - | - | 47800 | 53600 | 53600 | 68200 | - | - | |
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| 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. |
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