PRODUCT
Material: Stainless steel 316
Grade: A4-70,A4-80
Finish: Plain
Standard: DIN6921
MOQ:1000PCS
Samples: Free
Place of Origin: Zhejiang China
Product Details
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Headline: Premium Stainless Steel Serrated Hex Flange Bolts (Anti-Loosening Design)
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Paragraph 1: Our serrated hex flange bolts are manufactured to meet GB5787 / DIN 6921 standards. Crafted from high-grade 18-8 (304) stainless steel, they feature an integrated flange washer that distributes load evenly, while the serrated teeth bite into the mating surface to prevent loosening under vibration.
Hex Flange bolts have a circular edge under the head that acts like a washer to distribute loads. Standard, non-serrated flange bolts are also called frame bolts. Flange bolts are used in automobiles to secure outer casings protecting engines and transmissions. In plumbing, they secure pipe ends to ensure strong hold, regardless of materials in the ducts. Serrated flange bolts have teeth that grip surfaces for a tight hold. In electronics, flange bolts hold components together tightly to prevent particles from getting into devices. In hard-to-reach areas, flange bolts help install decks and overhead attachments more easily than regular bolts and washers. Long flange bolts are used to construct oil rigs, energy plants, and ships.
| 316 Chemical Composition(%) | ||||||||||
| Grade | C≤ | Mn≤ | Si≤ | S≤ | P≤ | Cr | Ni | Cu | MO | N |
| 0.017 | 0.98 | 0.25 | 0.0016 | 0.0414 | 16.23 | 10.08 | 0.32 | 2.06 | 0.037 | |
| 316 Mechanical property | |||
| σb≥ | σ0.2≥ | δ5 (%)≥ | Hardness(HB)(kgf/mm2)] |
| 520(Mpa) | 205(Mpa) | 40% | ≤187 HRB≤90 HV ≤200 |
| DIN6921 | ||||||
| Screw Thread d | Pitch P | k | s | |||
| coarse thread | Fine therad-1 | Fine thread-2 | min | max | ||
| M6 | 1 | / | / | 6.6 | 9.78 | 10 |
| M8 | 1.25 | 1 | / | 8.1 | 12.73 | 13 |
| M10 | 1.5 | 1.25 | 1 | 9.2 | 14.73 | 15 |
| M12 | 1.75 | 1.5 | 1.25 | 11.5 | 15.73 | 16 |
| M14 | 2 | 1.5 | / | 12.8 | 17.73 | 18 |
| M16 | 2 | 1.5 | / | 14.4 | 20.67 | 21 |
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Built-in Washer: Eliminates the need for separate washers and protects the workpiece surface.
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Anti-Vibration: The serrated teeth provide high friction and robust holding power for machinery and automotive applications.
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Corrosion Resistance: 304 stainless steel material ensures long service life in harsh environments.
Ideal for securing components on exhaust systems, heavy machinery, and industrial equipment where vibration is a concern.
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Q: What standard is this bolt?
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A: GB5787 / DIN 6921 Metric standard.
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Q: Is it suitable for outdoor use?
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A: Yes, 304 stainless steel provides excellent rust resistance.
