Flat washer
Qi Sheng flat washer are widely used to distribute clamping load and protect the bearing surface under bolt heads and nuts. They help reduce surface damage, improve seating, and can compensate for oversized holes in many general fastening applications.
We offer flat washers in multiple size ranges with options for different materials and surface finishes to suit indoor, outdoor, and corrosion-prone environments. Bulk orders and OEM packaging requirements are supported for industrial buyers.
To receive a quotation, send your required size (ID/OD/thickness), material, finish, and quantity.
How to Order (Quick Specs)
Please include: washer type, size (ID/OD/thickness), material, finish, quantity, and delivery destination.
DIN 125 Flat Washer
- Complies with ISO 7089, DIN 125, ANSI B18.22.1; universal standard fastener accessories
- Material: Carbon steel, stainless steel (304/316), brass, aluminum; optional corrosion-resistant variants
- Structure: Flat circular plate + central precision through hole (matching bolt/nut diameter)
- Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation), brass (natural finish)
- Size: aperture M1.6–M36, outer diameter 4–50mm, thickness 0.5–4mm
DIN 436 Square Washer
- Complies with ISO7089, DIN 436, ANSI B18.22.1; universal fastener auxiliary components
- Material: Carbon steel, stainless steel (304/316), brass; optional corrosion-resistant variants
- Structure: Square flat plate + central precision through hole (matching bolt/nut diameter)
- Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation), brass (natural finish)
- Size: aperture M3–M36, side length 8–60mm, thickness 1–5mm
DIN 9021 Large Plain Washer
- Complies with ISO 7093, DIN 9021, ANSI B18.22.1; universal fastener auxiliary components
- Material: Carbon steel, stainless steel (304/316), brass; optional corrosion-resistant variants
- Structure: Square flat plate + central precision through hole (matching bolt/nut diameter)
- Surface treatments: Carbon steel (zinc plating, black oxide), stainless steel (passivation), brass (natural finish);
- Size: aperture M3–M36, side length 8–60mm, thickness 1–5mm