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The parameters of Phillips screws include thread diameter, length, head size, slot type, and material, with commonly used standards being GB/T 818-2016 and ISO 4762. 

Screw Types and Slot Types

Phillips screws are mainly divided into two categories according to slot type:

PH (Phillips) series: Commonly used in electronic devices and small machinery, such as PH0 (diameter ≤ 2mm), PH2 (diameter 3-5mm).

PZ (Pozidriv) series: More slip-resistant, often used in furniture and automobiles, such as PZ1 (diameter 2-3mm), PZ3 (diameter 6-8mm).

Size Parameters

The main size parameters of a Phillips screw include:

Thread Diameter: Metric such as M3, M4, or imperial such as #6, #8.

Nominal Length: Generally ranges from 1mm to 60mm, with special custom lengths available.

Head Diameter and Thickness: The head is pan-shaped with a Phillips slot on top; the head diameter is usually slightly larger than the thread diameter, and the thickness is as specified by the standard.

Slot Width and Depth: Designed according to GB944.1 standards or Z-type slot styles to ensure compatibility with screwdrivers.

We stock carbon steel Phillips pan head / flat head screws, diameter M1.6–M5, length 4–50 mm, with surface finishes of zinc plating, nickel plating, or black zinc. Also available in stock: stainless steel 304/316 micro-logo screws. Custom materials accepted upon request.