Hex socket flat countersunk head screws fully threaded

BN 1422
Overlay

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Hex socket flat countersunk head screws fully threaded

BN 1422
Standard
DIN 7991 (Standard withdrawn) ~ISO 10642 ~UNI 5933
Headform
Countersunk head 90°
Drive
Hexagon socket
Thread
fully threaded
Material
Steel
Property class
010.9 / 10.9 (The head marking is determining)
Surface
Zinc flake coated ISO 10683/flZnL/nc/480h/C (µ=0.12-0.18)

Description

Additional information

Fasteners to the given specification have a reduced loadability due to the head geometry according to ISO 898-1.

The general change-over from DIN 7991 to ISO 10642 in the practice requires a verification of the application.

Assembly

The designation system according to ISO 10683 defines the expected corrosion protection and the friction coefficient range. Further performance specifications of a coating brand used are not specified. Additional thread coating may limit the ability to install zinc flake coated screws < M5 by hand.

Variants

CAD