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Dacromet-Coated Hexagon Flange Bolts: High-Torque, Anti-Loose Fasteners for Harsh Marine/Industrial Environments
●Material: Carbon Steel and Stainless Steel
●Surface Treatment: Galvanized, Nickel Plated, Black Oxide, Hot Dip Galvanizing, Dacromet
●Metric Strength Grades: 4.8, 8.8, 10.9, 12.9
●Metric Thread Diameter: M3 ~ M24
●Metric Thread Length: 4 ~ 100
Description
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Dacromet Hexagon Flange Bolts: Feature hexagon head with integrated flange (eliminating extra washers), paired with Dacromet zinc coating for >500h salt spray corrosion resistance, no hydrogen embrittlement, and strong wear resistance. Ideal for automotive, marine, and industrial harsh environments, ensuring stable, anti-loose fastening.
Common Models: M8, M10, M12, M14
| Thread size d |
M5 | M6 | M8 | M10 | M12 | (M14) | M16 | ||
| P | Thread pitch | 0.8 | 1 | 1.25 | 15 | 1.75 | 2 | 2 | |
| b | Reference | Ls125 | 16 | 18 | 22 | 26 | 30 | 34 | 38 |
| 125<L≤200 | / | / | 28 | 32 | 36 | 40 | 44 | ||
| L>200 | / | / | / | / | / | / | 57 | ||
| c | min. | 1 | 1.1 | 12 | 15 | 1.8 | 2.1 | 2.4 | |
| da | Type F max. | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | |
| Type U max. | 6.2 | 7.5 | 10 | 12.5 | 15.2 | 17.7 | 20.5 | ||
| dc | max. | 11.4 | 13.6 | 17 | 20.8 | 24.7 | 28.6 | 32.8 | |
| ds | max. | 5 | 6 | 8 | 10 | 12 | 14 | 16 | |
| min. | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | ||
| du | max. | 5.5 | 6.6 | 8.8 | 10.8 | 12.8 | 14.8 | 17.2 | |
| dy | min. | 9.4 | 11.6 | 14.9 | 18.7 | 22.5 | 26.4 | 30.6 | |
| e | min. | 7.59 | 8.71 | 10.95 | 14.26 | 16.5 | 19.86 | 23.15 | |
| k | max. | 5.6 | 6.9 | 8.5 | 9.7 | 12.1 | 12.9 | 15.2 | |
| k1 | min. | 2.3 | 2.9 | 3.8 | 4.3 | 5.4 | 5.6 | 6.8 | |
| f | max. | 1.4 | 1.6 | 2.1 | 2.1 | 2.1 | 2.1 | 3.2 | |
| r1 | max. | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | |
| r2 | max. | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1 | |
| r3 | max. | 0.25 | 0.26 | 0.36 | 0.45 | 0.54 | 0.63 | 0.72 | |
| min. | 0.10 | 0.11 | 0.16 | 0.20 | 0.24 | 0.28 | 0.32 | ||
| r4 | max. | 4 | 4.4 | 5.7 | 5.7 | 5.7 | 5.7 | 8.8 | |
| S | max. | 7 | 8 | 10 | 13 | 15 | 18 | 21 | |
| min. | 6.78 | 7.78 | 9.78 | 12.73 | 14.73 | 17.73 | 20.67 | ||
| V | max. | 0.15 | 0.20 | 0.25 | 0.30 | 0.35 | 0.45 | 0.50 | |
| min. | 0.05 | 0.05 | 0.10 | 0.15 | 0.15 | 0.20 | 0.25 | ||
| Lo | 25 | 30 | 35 | 40 | 45 | 50 | 55 | ||
Company Information
Hebei Fujinrui Metal Products Co., Ltd. is an enterprise integrating fastener product production and metal surface treatment. It has multiple machining workshops and surface treatment workshops, with a workforce of more than 300 pcs employees, boasting a mature production scale and strong technical strength.
The company's can produce national standard self-drilling screws, national standard external hexagon bolts, socket head cap screws, nuts, flange bolts and nuts, national standard flat washers and spring washers, etc.and there are always bolts and self-drilling screws in stock, In addition, it undertakes external metal surface processing, adopting processes such as Dacromet, Geomet, Luxiubao, Magni, Ruspert, etc. The products processed can pass the neutral salt spray test for up to 2000 hours at the maximum, featuring excellent quality and enjoying high trust from customers.
We adhere to the corporate culture of "Quality First, Customer Supreme", always insisting on technological innovation and process optimization, and are committed to providing customers with high-quality fastener products. The company's products are sold both at home and abroad and have won widespread market recognition.
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