Hex socket flat countersunk head screws fully threaded

BN 21
Product image of Hex socket flat countersunk head screws fully threaded
  1. Product image of Hex socket flat countersunk head screws fully threaded
  2. Technical drawing with dimensions of Hex socket flat countersunk head screws fully threaded
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Product image of Hex socket flat countersunk head screws fully threaded
  • Product image of Hex socket flat countersunk head screws fully threaded
  • Technical drawing with dimensions of Hex socket flat countersunk head screws fully threaded

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DIN 7991 (Standard withdrawn) ~ISO 10642 ~UNI 5933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 (The head marking is determining)
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