FLAT HEAD COUNTERSUNK SOCKET CAP SCREW (DIN7991/ ISO10642)

FLAT HEAD COUNTERSUNK SOCKET CAP SCREW (DIN7991/ ISO10642)
Socket screws have a hexagonal recess and fastened by a hexagonal wrench or hex driver, requiring a tool to tighten and remove. We also provide tamper resistant with a pin in the recess.

INTERNATIONAL STANDARDS

  • DIN 7991
  • ISO 10642
  • UNI 5933

APPLICATIONS

Limited Use:
Flat head countersunk socket cap screws DIN 7991 are not intended for high strength application. The purpose of producing them with a strength of the property class 10.9 is to increase the wear resistance of the sockets.

Tightening Procedure:
Insert the key into the socket and apply the torque on the nut while holding the key. Should however, the torque be applied on the screw itself it should be reduced accordingly.

MATERIAL

 

Material Available:

  • LOW CARBON STEEL : C1006 - C1045
  • STAINLESS STEEL: SUS304, SUS316, SUS410
  • GRADE 8.8: C1018 - C1022, 10B21
  • MILD STEEL / MID CARBON STEEL: C1035 - C1045
  • ALLOY STEEL: SCM435 - SCM440 (Grade 10.9, Grade 12.9)
  •  │8│GRADE 1008K 1010 
  • 7 8 GRADE 1015(M<16) CH38F (M≥16)
  • 8 10 GRADE CH38F 1039 10B21 10B33
  • 9 12 GRADE 1039 10B21 10B33 10B38 
  • BRASS C2600, C2700, C2680
  • RED BRASS C1100
  • Phosphor Bronze C5191
  • Aluminum Alloy 1050, 5052, 6061
  • Material according to customer’s specifications

SIZE RANGE

STANDARD SIZE RANGE:
  • D = M3 ~ M20
  • L = 6MM ~ 150MM

SURFACE TREATMENT

SURFACE TREATMENT TYPES:

  • PLAIN; NON-PLATED
  • HEAT TREATMENT
  • ZINC PLATED – WHITE ZINC / YELLOW ZINC / BLACK ZINC
  • Zinc trivalent coatings Cr3+ (Meet RoHS standards)
  • Zinc hexavalent zinc plating Cr6+
  • Nickel plating
  • Black Oxide
  • Black / Grey Phosphate
  • Hot Dip Galvanised
  • GEOMET® 500
  • DACROMET®
  • Passivation
  • All electro-plating, electro-coating and surface treatment specifications can meet customer's requirements.