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
Made of stainless steel or carbon steel, these bolts are polished to a mirror finish and provide excellent corrosion resistance.The unique head styling not only gives fantastic good looks but also provides a functional element as the washer base spreads the load.These are also machined with rolled threads to give extra strength and a smoother finish.Flange bolts virtually eliminate the need for washers because the area under the bolt head is wider and creates a larger area for even distribution of pressure. We also supply hex flange nuts that work in tandem with our hex flange bolts. We have different grades of hex flange bolts, hex flange nuts, and hex flange screws to fit a wide range of applications. Stainless steel is widely used in the fastener industry,which not only looks great but has other benefits too..
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 |
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 |
• 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
• 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