Product Description
1. Standard
Manufactured according to GB/T 5787, Grade B precision. The bolt head is designed with an integrated flange washer, and some flange types feature serrated anti-slip teeth, eliminating the need for additional flat washers and simplifying assembly.
2. Common Specifications

• Thread sizes: M5–M20
• Regular stock sizes: M6, M8, M10, M12, M14, M16
• Mainly available in full-thread configuration

3. Material Options
304 Stainless Steel (A2-70)

• General corrosion resistance
• Suitable for indoor and mildly humid environments

316 Stainless Steel (A4-70)

• Excellent resistance to acids, alkalis, and seawater
• Suitable for chemical, marine, and outdoor environments

Surface Finish

• Natural polished stainless steel finish
• No electroplating required
• Long-lasting corrosion resistance

4. Product Features

• The flange surface provides a larger bearing area and enhances load distribution.
• Improved locking performance helps prevent loosening.
• Serrated flange design offers anti-slip and anti-rotation functions.
• Eliminates the need for separate washers, improving installation efficiency.
• Better sealing and load-bearing performance than standard hex head bolts.

5. Applications
Widely used in:

• Automotive chassis and engines
• New energy equipment
• Home appliance enclosures
• Hydraulic components
• Agricultural machinery
• Sheet metal and thin-wall fastening applications