PRODUCT
Material: Stainless steel 316
Grade: A4-70,A4-80
Finish: Plain
Standard: DIN6921
Certification: ISO9001
MOQ:1000PCS
Samples: Free
Place of Origin: Zhejiang China
Product Details
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 |
• Standard: DIN 6921 / ISO 1665 (hex head with integral flange)
• Material: A2-70 (AISI 304) or A4-80 (AISI 316) stainless steel
• Size Range: M5–M20; lengths 10–200 mm
• Thread: Metric coarse 6g default; fine pitch & UNC/UNF on request
• Flange Diameter & Thickness: matched to bolt size for uniform load spread
• Finish: plain passivated; optional mirror or electropolish
• Proof Load: A2-70 ≥ 450 MPa; A4-80 ≥ 600 MPa
• Salt-Spray Resistance: A2 ≥ 500 h; A4 ≥ 1 000 h
• Zero coating build-up—maintains precise fit
• Marine: boat decks, railings, dock hardware (A4-80)
• Food & Beverage: processing equipment, tanks, conveyors
• Construction: façade panels, solar racking, chemical plant structures
• Transportation: bus & train bodywork, trailer assemblies
• Electronics & Medical: clean-room equipment and instrument casings
