Industrial Fastener · Washers Series
Fender Washer / Large OD Washer
Fender washers (DIN 9021) have an outside diameter approximately 3 × the bolt diameter — much larger than a standard DIN 125 flat washer. The extra surface area distributes clamping load across a wider region, useful when bolting against wood, plastic, sheet metal, or oversized holes.
Product Overview
Fender Washer / Large OD Washer sourcing essentials
Fender washers (DIN 9021) have an outside diameter approximately 3 × the bolt diameter — much larger than a standard DIN 125 flat washer. The extra surface area distributes clamping load across a wider region, useful when bolting against wood, plastic, sheet metal, or oversized holes.
DIN 9021
Carbon steel, Stainless 304/316
Fender washers (DIN 9021) have an outside diameter approximately 3 × the bolt diameter — much larger than a standard DIN 125 flat washer. The...
Inspection records, lot labels, certificate options, and destination-ready packing.
Technical Data
Specification range
Final dimensions, mechanical properties, finish, and packing are confirmed against the RFQ and applicable standard.
| Standard | DIN 9021 |
|---|---|
| Size Range | M3 – M30 |
| Outside Diameter | Approximately 3 × bolt diameter |
| Material | Carbon steel, Stainless 304/316 |
Common surface finishes
Select an option to review its sourcing note. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Checked before consolidation and export
Each order is matched to the specified standard and verified at practical control points before shipment.
RFQ confirmation
Standard, size, grade, pitch, finish, certificates, packing, and destination are locked before production.
Lot verification
Critical dimensions, thread fit, markings, finish appearance, and packing labels are sampled and recorded.
Shipment approval
Photos and required reports are organized before consolidated loading and export documentation.
Buyer Questions
Frequently asked questions
When do I use a fender washer vs a regular flat washer?
Fender washer: when bolting against soft material (wood, plastic, thin sheet metal), when the hole is oversized, or when load needs to be spread over a larger area. Regular flat washer: standard hardware-on-hardware bolting where modest load distribution is sufficient.
Ready to quote Fender Washer / Large OD Washer?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.