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| Customization: | Available |
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| Drive Type: | Hand Twist |
| Finish: | Zinc Plated |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| DIN314 Standard Zinc Plated Butterfly Wing Nut | |
| Material: | Carbon Steel, Stainless Steel, Brass etc. |
| Standards: | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS, ETC |
| Size: | M4-M12 or non-standard asa request & design |
| Finish: | Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc. |
| Thread Size d |
M4 | M5 | M6 | M8 | M10 | M12 | |
| P | Pitch | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 |
| n | max | 21 | 26.5 | 32 | 38 | 50 | 66 |
| min | 19 | 24.5 | 29 | 35 | 47 | 63 | |
| H | max | 11 | 13 | 16 | 19 | 24 | 32 |
| min | 9 | 11 | 14 | 17 | 22 | 29 | |
| h | min | 1.1 | 1.5 | 1.5 | 2 | 3.6 | 4.1 |
| d1 | max | 7 | 9 | 11 | 12.5 | 16 | 19 |
| min | 5.5 | 7.5 | 9 | 10.5 | 14 | 17 | |
| dk | max | 9 | 12 | 14 | 16 | 21 | 24 |
| min | 7 | 9 | 11 | 13 | 18 | 21 | |
| k | max | 4.6 | 6 | 7 | 8.5 | 10 | 13 |
| min | 3.2 | 4 | 5 | 6.5 | 8 | 10 | |
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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 stainless steel grades do you supply for bolts? |
| A2: We supply multiple grades including A2-70, A2-80, A4-70, A4-80, 304, 316, and 410SS, suitable for different mechanical strength and corrosion-resistance requirements. |
| 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: Will stainless steel bolts rust over time? |
| A7: Under severe chemical or chloride exposure, A2 may develop slight surface corrosion. A4/316 performs better in harsh environments. We also offer passivation treatment for enhanced protection. |
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