SQUARE NUT (DIN557 / DIN562)

SQUARE NUT (DIN557 / DIN562)
A square nut is a four-sided nut.

Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). They are also much less likely to become rounded-off after repeated loosening/tightening cycles.

Square nuts are typically mated with square-headed bolts. Square nuts are used along with flat washers in order to avoid damage from its sharp edges and helps to increase the strength of the fastener. Square nuts can have standard, fine or coarse threading with platings of zinc yellow, plain, zinc clear, tin and cadmium, among others.

Common Standards are ASTM A194, ASTM A563, or ASTM F594 standard.

Benefits of Square Nut:
  • Tighten easily by gripping two sides
  • Work well in tight spaces by using needle nosed pliers
  • Work well in blind spots using pliers or a wrench
  • Can be a quick gauge to measure the position of the nut

INTERNATIONAL STANDARDS

  • DIN 557
  • DIN 562
  • BN 3525
  • BN 10769
  • ASTM A194
  • ASTM A563
  • ASTM F594 standard

PRODUCT APPLICATIONS

  • Commonly used in furniture as a blind nut,
  • Square nuts are used in rail channels in order to prevent turning of rail when pressure is applied.
  • They are also used to make perfect foundation in metal channels for hidden fasteners.

MATERIAL

  • 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:
  • M5 - M12
  • 1/8" - 3/8"
  • UNC  3# - 12#
  • Manufacture by stamping press:
    D= M4 - M16 ; L= M4 - M40 ; H= 1.2 - 5.5 MM

SURFACE TREATMENT

  • 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
  • Hot Dip Galvanised
  • GEOMET® 500
  • DACROMET®
  • Passivation
  • All electro-plating, electro-coating and surface treatment specifications can meet customer's requirements.