FLAT WASHER (DIN 125)

FLAT WASHER (DIN 125)
A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut.

Other uses are as a spacer, spring (Belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer). Washers often have an outer diameter (OD) about twice their inner diameter (ID), but this can vary quite widely.

INTERNATIONAL STANDARDS

  • DIN 125A
  • ISO 7089
  • ISO 7090
  • ANSI B18.22.1
  • JIS B1256
  • JIS B 1256N  - 1978

APPLICATIONS

A flat washer, annulus or ring, often of metal, used to spread the load of a screwed fastening. Additionally, a plain washer may be used when the hole is a larger diameter than the fixing nut.

A washer with a slight conical shape, which provides an axial force when deformed. The surface may be serrated, which will have improved locking capabilities

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:
  • INNER DIAMETER = 3.6mm - 40mm (1/8" - 1-1/2")
  • OUTER DIAMETER = 9.5mm - 82.5mm
  • THICKNESS = 0.8mm - 3.5mm

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