10.9Class hexagon socket countersunk head screw

Supported specifications:M3 to M20 (standard inventory)

Manufacturer: ANSCO M3-8; NSN M3-20; GOSHO M3-16; KKT M3-16, etc.

Hexagon sockets have strict dimensional tolerances, and some manufacturers increase the 't' value beyond the standard to reduce the likelihood of slipping

Material: Structural alloy steel

Hardness: 32-39HRC

Surface treatment: blackening treatment (other surface treatments are available on demand)

Please ask our customer service for  specifications not shown in the following table .