Qi Sheng supplies a full range of industrial washer for OEM manufacturers, distributors, and project buyers. Washers are used to distribute load, protect surfaces, improve joint stability, and support reliable fastening in machinery, construction, and general assembly. Our washer selection includes flat washer, lock washer, and bowl type washer to match different installation and performance requirements.
We support specification-based sourcing by inner/outer diameter, thickness, hardness/material, and surface finishes for corrosion protection. If you are matching bolts and nuts for an assembly, our team can help confirm the correct washer type and dimensions to improve fit and performance.
For fast quoting, please share: washer type, size (ID/OD/thickness), material, finish, quantity, and application.

How to Order (Quick Specs)
Please include: washer type, size (ID/OD/thickness), material, finish, quantity, and delivery destination.

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DIN 125 Flat Washer

  1. Complies with ISO 7089, DIN 125, ANSI B18.22.1; universal standard fastener accessories
  2. Material: Carbon steel, stainless steel (304/316), brass, aluminum; optional corrosion-resistant variants
  3. Structure: Flat circular plate + central precision through hole (matching bolt/nut diameter)
  4. Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation), brass (natural finish)
  5. Size: aperture M1.6–M36, outer diameter 4–50mm, thickness 0.5–4mm

DIN 127 Spring Lock Washer

  1. Complies with ISO 7090, DIN 127, ANSI B18.21.1; anti-loosening fastener accessories
  2. Material: Carbon steel, stainless steel (304/316), alloy steel; elastic-grade variants available
  3. Structure: Open annular body + central through hole (matching bolt diameter)
  4. Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation)
  5. Size: Aperture M2–M36, thickness 0.5–4mm, opening gap 0.2–1.5mm

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

DIN 436 Square Washer

  1. Complies with ISO7089, DIN 436, ANSI B18.22.1; universal fastener auxiliary components
  2. Material: Carbon steel, stainless steel (304/316), brass; optional corrosion-resistant variants
  3. Structure: Square flat plate + central precision through hole (matching bolt/nut diameter)
  4. Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation), brass (natural finish)
  5. Size: aperture M3–M36, side length 8–60mm, thickness 1–5mm

DIN 9021 Large Plain Washer

  1. Complies with ISO 7093, DIN 9021, ANSI B18.22.1; universal fastener auxiliary components
  2. Material: Carbon steel, stainless steel (304/316), brass; optional corrosion-resistant variants
  3. Structure: Square flat plate + central precision through hole (matching bolt/nut diameter)
  4. Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation), brass (natural finish);
  5. Size: aperture M3–M36, side length 8–60mm, thickness 1–5mm

DIN6796 Conical Spring Washer

  1. Complies with ISO 7084, DIN 6796, ANSI B18.21.1; anti-loosening fastener accessories.
  2. Material: Carbon steel, stainless steel (304/316), alloy steel; elastic-grade variants available.
  3. Structure: Conical annular body (open/closed type) + central through hole (matching bolt diameter).
  4. Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation);
  5. Size: aperture M2–M36, thickness 0.8–5mm, cone height 0.3–3mm

NFE25511 French Anti-loose Conical Washer

  1. Standard: NF E25-511 (French standard)
  2. Material: Spring steel, alloy steel, stainless steel (304/316); HRC42-45
  3. Structure: Conical annular body + central through hole + single/double-sided serrations
  4. Specifications: M3-M20
  5. Surface treatment: Dacromet, zinc-magnesium plating, black oxide
  6. Types: Standard (Z), enlarged (M), widened (L) – compatible with different bolt head sizes