PRODUCT
Material: Stainless steel 304
Grade: A2-70,A2-80
Finish: Plain
Standard: DIN6921
Certification: ISO9001
MOQ:1000PCS
Samples: Free
Place of Origin: Zhejiang China
Product Details
• 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
| 304 Chemical Composition(%) | ||||||||
| Grade | C≤ | Mn≤ | Si≤ | S≤ | P≤ | Cr | Ni | N≤ |
| 0.08 | 2 | 0.75 | 0.03 | 0.045 | 18.0-20.0 | 8.0-10.5 | 0.1 | |
| 304 Mechanical property | |||
| σb≥ | σ0.2≥ | δ5 (%)≥ | HB[N(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 |
• 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
• One-piece flange replaces separate washer—reduces parts count and assembly time
• Serrated or smooth flange options available for anti-vibration locking
• High corrosion resistance for long service life in harsh environments
• Clean stainless appearance for visible joints
• 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
