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screw identifiers in PET
how are the screw identifications in the PET to be interpreted? for example, here's one that I lost:
Illustration 201-03
part no. N 043 864 1
Screw
BM 3 X 6
what does the "BM" mean? I assume "3 x 6" is millimeters of the head and shaft. I have not found this style of identifier in the usual places (Fastenal, Bolt Depot, etc.), so I am lost when trying to find it in the local hardware fastener drawers.
another screw I have from the same illustration,
N 013 957 5
Tapping screws
B 3,5 X 9,5
this one has a measured thread pitch of 1.25
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87 944 NA
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