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Hexagon socket head shoulder screw UNC ASME B18.3 Steel Plain 012.9

  • All dimensions in above table are in inches.
  • Marking of these screws is not mandatory.
  • Due to the unfavourable head geometry these fasteners have reduced loadability.
  • Attention: As the thread tolerance class for these screws is 3A, plating can cause thread fit problems.
Class 012.9
Driving features Hexagon socket
Head shape Cylindrical head
Material Steel
Thread direction Right
Surface treatment Plain
Thread Unified National Coarse
  • Warning: electroplating of these products may cause hydrogen embrittlement.
ASME B18.3
BS 2470

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