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HEBEI DUOJIA METAL PRODUCTS CO.,LTD. (HEBEI MIJIA) 

About Company
 
 
Model / Specification
M3×20, M4×25
Country of Origin
CHINA
Surface Treatment
Black Oxide
Material
Carbon Steel
Alias
Hex Socket Round Head Screw
 
Patent
None
Head Marking
Capacity
80000 PCS/Month
Minimum Order Quantity
1000 PCS
Detailed Description
Button Head Socket Cap Screw:These are button head socket cap screws, mechanical fasteners. Used in electronics, machinery, furniture assembly. Feature socket drive for tightening, button head for aesthetic installation. Black finish (likely black oxide) for rust resistance/aesthetic needs.

Instructions for Use:
Tool Selection: Use a matching hex socket wrench corresponding to the screw’s internal drive size.
Pre - installation Check: Ensure the screw threads match the tapped hole or nut, and check for any damage to the screw (e.g., thread deformation, head damage).
Installation:
Align the screw with the mounting hole.
Insert the hex socket wrench into the screw’s drive. Rotate clockwise to tighten gradually. Apply even force to avoid stripping the drive or damaging threads.
Stop tightening when the screw head sits flush with (or as required by) the surface, ensuring stable fastening without over - tension.
Maintenance: Periodically inspect for loosening. If disassembly is needed, use the correct hex socket wrench to rotate counterclockwise for removal.
 
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