How many head types of micro screws

type of micro screw

There are thousands of micro screw and small screw in our life, and we can see screws every day in our life but actually we still often encounter such problems in the daily sales of screws:
That is we still can not accurately express the type of screw of what we need, cause it is easy to confuse the screw head type, resulting in the inability to use after purchase and affect the production progress, such as the confusion of the FAPA head type.

When measuring the screw size, because of the different of measuring way and measuring point which causes the wrong screw specification. For example, the measurement method of round head screws is completely different.

Therefore, we have listed some tiny screw types,small screw and micro screw to facilitate the non-professionals as a reference when choosing screws.

FAKA self tapping screw



The measurement method of flat countersunk head tapping screws: screw diameter * total length (including head)


PA self tapping screw



Measuring method of round head self tapping screw: screw diameter * screw length (not including head)

PB self tapping screw



measurement method: screw diameter * screw length (not including head)

FB self tapping screw

measurement method: screw diameter * total length (including head)

PT Self tapping screw


Measurement method: screw diameter * screw length (without head)

PWA (washer flanged head self tapping screw)



Measuring method: screw diameter * screw length (not including head)



KM/FM machine screw (flat cks head machine screw)



Measurement method: screw diameter * total length (including head


PM round head machine screw



Measuring method of round head machine screw: diameter * screw length (without head)

TM (truss head machine screw)



Large flat head machine screw measurement method: screw diameter * screw length (not including head)

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