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NF E25-107 Standard Dimensions for Hexalobular socket countersunk flat head screws

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This norm has been cancelled

Screws With Six Lobes Recessed Countersunk Head - Symbol FX

This document defines the characteristics of countersunk head machine screws with internal six lobes, with integral load capacity, of grade A, and of diameters M3 to M10.

Dimensional Drawing and Technical Diagrams

1128_hABzvf_nf-e25-107.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source NF E 25-107

Publication date: 09/2007

d thread size P b dk max=nom k max t min t max A

Socket Nr.

M 3 0.5 25

7.40

2.20 0.92 1.18

2.8

T10
M 4 0.7 38 10.02 3.01 1.30 1.69 3.95 T20
M 5 0.8 38 12 3.50 1.50 1.89 4.5 T25
M 6 1 38 14.44 4.22 1.83 2.22 5.6 T30
M 8 1.25 38 19.38 5.69 2.60 2.99 7.93 T45
M 10 1.5 38 23 6.50 2.91 3.30 8.95 T50

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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