NFE25511 French Anti-loose Conical Washer
NFE25511 French Anti-loose Conical Washer
Back to products
DIN 127 Spring Lock Washer
DIN 127 Spring Lock Washer
Self-locking washer for secure fastening applications, DIN 25201 standard, made of durable metal.
Self-locking washer for secure fastening applications, DIN 25201 standard, made of durable metal.
Double fold self-locking washer for secure fastening, DIN 25201 standard.
Click to enlarge
Self-locking washer for secure fastening applications, DIN 25201 standard, made of durable metal.
Self-locking washer for secure fastening applications, DIN 25201 standard, made of durable metal.
Double fold self-locking washer for secure fastening, DIN 25201 standard.

DIN 25201 Double fold self-locking washer

  1. Complies with ISO 10664, DIN 25201, ANSI B18.21.1; anti-loosening fastener accessories
  2. Material: Carbon steel, stainless steel (304/316), alloy steel; elastic-grade variants available
  3. Structure: Double-folded annular body (open/closed type) + central through hole + self-locking folded edges
  4. Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation)
  5. Size: Aperture M3–M24, thickness 1.0–4.5mm, folded edge height 0.4–2.5mm
Category:
Description

Core features of DIN 25201 Double fold self-locking washer

  1. Double-fold elastic self-locking: Folded edges bite fasteners/nuts, resisting vibration-induced loosening
  2. Sustained preload: Bidirectional rebound force compensates for material settlement, maintaining stable clamping force
  3. Pressure dispersion: Folded contact surface distributes force evenly, reducing local workpiece stress
  4. Easy installation: Directly fits over bolts, no additional tools or complex operations
  5. Wide compatibility: Matches same-spec bolts/nuts, suitable for machinery, automotive, electrical equipment

 

Product Parameter (Specification)

StandardDIN,ASTM/ANSI,ISOMaterialCarbon steel, Stainless Steel, Aluminum
Surface TreatmentZinc Plated,Galvanized,Black Oxide, Passivation,Sand Blast, PTFE, Teflon, XylanSizeM3-M36
GradeHV350-550UnitePiece,KGS,TON
PackingBulk cartons with pallet, small boxes in cartons with palletLead timeBusy season:20-30days,Slack season:10-20days

 

Product Application

Double fold self-locking washer DIN25201 is widely used in heavy Industry, mining, water treatment, healthcare, retail industry, general industry, machinery, Oil & Gas, automotive industry etc.

 

DIN 25201 Double fold self-locking washer for Furniture Application Scenario Table

Application FieldSpecific ScenariosStandards & GradesKey Considerations
Industrial EquipmentVibration-prone machinery, motor bases, transmission parts, electrical cabinet fasteners.DIN 25201; Carbon steel 65Mn (zinc-plated), Stainless steel 304 (A2-70).Double-fold design enhances self-locking; Strong anti-loosening under high vibration; Compensates for assembly gaps.
Construction & DecorationGuardrail joints, curtain wall fasteners, door/window hinges, ceiling suspension parts.DIN 25201; Carbon steel 65Mn (hot-dip galvanized), Stainless steel 316 (A4-80).Indoor/outdoor corrosion resistance; Maintains stability for long-term installation; Prevents structural loosening.
Light IndustryPower tool casings, office furniture hardware, small appliance fasteners, metal racks.DIN 25201; Carbon steel 65Mn (black oxide), Stainless steel 304 (A2-70).Cost-effective for mass production; Compatible with standard bolts/nuts; Dual anti-loose (fold + friction).
DIY & MaintenanceHousehold machinery fixes, garden tool assemblies, handmade projects, hardware renovations.DIN 25201; Carbon steel 65Mn (zinc-plated), Stainless steel 304 (A2-70).User-friendly for non-professionals; Easy wrench installation; Durable for light-medium dynamic loads.

Related products

DIN 127 Spring Lock Washer
DIN 127 Spring Lock Washer

DIN 127 Spring Lock Washer