GB/T 819.1-2016
ActiveCountersunk flat head screws with cross recess—Part 1: Property class 4.8
十字槽沉头螺钉 第1部分：4.8级
Application Summary AI generated
This standard specifies the dimensions, technical requirements, and marking of cross-recessed countersunk flat head screws with property class 4.8, ensuring they achieve a minimum tensile strength of 400 MPa and a yield strength of 320 MPa. It is applied in general mechanical assembly, automotive, and electronic industries where flush-mounted fasteners are required to avoid protrusions, such as in paneling, enclosures, and structural joints. The standard is used by manufacturers and quality inspectors to verify compliance during production and procurement.
Related Standards
GB/T 9074.5-2004
Cross recessed small pan head screw andwasher assemblies with plain washers
GB/T 62.2-2004
Wing nuts--Square wing
GB/T 62.3-2004
Wing nuts--Pressing wing
GB/T 62.1-2004
Wing nuts--Round wing
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and washer assemblies with plain washers
GB/T 3098.20-2004
Mechanical properties of fasteners--Wing nuts with specified proof torque
GB/T 62.4-2004
Wing nuts--Die-casting wing
GB/T 3098.19-2004
Mechanical properties of fasteners--Blind rivets with break pull mandrel
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.