Hex socket flat countersunk head screws fully threaded

BN 21
Overlay

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Hex socket flat countersunk head screws fully threaded

BN 21
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DIN 7991 (Standard withdrawn) ~ISO 10642 ~UNI 5933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
Surface
zinc plated blue

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.

Safety Instructions

Transportation and storage

ISO 4042 Quenched and tempered fasteners ≥ 360 HV and tempered case-hardened fasteners with electroplated coatings: Susceptible to hydrogen embrittlement! Further notice to residual risks can be found on our web page: Notes on use

Variants

CAD