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Hexagon socket countersunk head bolt ISO10642/ DIN7991,similar to national standard GB70.3. The shape of the bolt head is concial. Generally, the opening angle is 90.
The inside of the head is hexagonal polygon. ISO10642 hexagon socket countersunk head bolt is basically the same as the substrate surface after installation Flat, which saves space and plays the role of aesthetic decoration, has been widely used.
Performance grade: carbon steel: grade 8.8/10.9/12.9, stainless steel A2-50/A4-70/80.
surface treatment:carbon steel surface treatment is generally boiled black, galvanized, non electrolytic zinc sheet coating, thick galvanized vzd and thick galvanized
Zinc plus sealing (zsml), zinc nickel coating silver (znshl), zinc nickel coating black (zhbh)
Wuxi Zhuocheng Mechanical Components Co., Ltd. is established in 1990, and one group of manufacturing and selling professional fastener
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