Different Type Of Head M4 Phillips Flat Head Machine Screw Size Can Be The Same?

Why are the dimensions of the M4 phillips flat head machine screw different? Can the M4 phillips screws of different head types be the same size? Commonly used head types generally include button heads, pan heads, raised countersunk heads, flat countersunk heads, round heads, truss heads, cup heads, and the like. Let’s see if the size of the head can be the same?

The raised countesunk M4 phillips flat head machine screw has an angle of 120° in GB 974-1976, a head diameter of 8.45 mm-8.8 mm, and a head thickness of 1.5 mm. GB/T 819.1-2016 is a phillips flat head machine screw. The head diameter of the M4 is 8.04mm-8.4mm and the head thickness is 2.7mm. GB/T 818-2000 is a pan head phillips machine screw. The head diameter of M4 is 7.64mm-8mm, and the thickness of the head is 2.92mm-3.1mm. GB 973-1976 is a truss head machine screw. The head diameter of M4 is 9.64mm-10mm, and the thickness of the head is 1.8mm-2.2mm.

When the thickness of the head and the diameter are the standards of the M4 Phillips screw of the pan head, can the dimensions of other head shapes be the same?

The angle of the raised countersunk head and the countersunk head screw is 66°. This kind of work on the lathe or the mold, confirm with the mold factory whether it can be made, and whether the material can be pushed so thick. After confirming Ok, you can tell the customer.

Truss head: The head shape made according to this size is not the same as the standard truss head screw. Therefore, in order to make a truss head shape, it is necessary to reduce the thickness of the head.

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