Product Description
M16 A2 stainless steel large-diameter penny repair washers manufactured to DIN 9021, with an approximately 17mm clearance hole, 50mm external diameter and 3mm nominal thickness.
These oversized flat washers provide a substantially wider bearing surface than standard flat washers. They help distribute clamping loads over a larger area and are particularly useful when fastening thin sheet material, reinforcing weakened mounting points or covering enlarged and damaged holes.
- Nominal fastener size: M16
- Internal clearance diameter: Approximately 17mm
- External diameter: Approximately 50mm
- Nominal thickness: Approximately 3mm
- Material: A2 stainless steel
- Finish: Natural stainless steel
- Standard: DIN 9021
- Equivalent modern designation: ISO 7093-1 type
- Washer style: Large-diameter flat washer
- Alternative names: Penny washer, repair washer, mudguard washer and fender washer
- Pack sizes available: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 50, 100, 250, 500 and 1000
| Nominal Size | Internal Diameter | External Diameter | Nominal Thickness | Material | Standard |
|---|---|---|---|---|---|
| M16 | Approx. 17mm | 50mm | Approx. 3mm | A2 Stainless Steel | DIN 9021 |
DIN 9021 penny washers are commonly used in automotive repairs, bodywork, mudguards, panels, roofing, cladding, fabrication, machinery, agricultural equipment, trailers and general maintenance applications.
The oversized 50mm external diameter spreads the load from an M16 bolt, screw or nut over a substantially wider area than a standard washer. This can help reduce the risk of the fastener pulling through thin material and can bridge mounting holes that have become worn, enlarged or damaged.
The approximately 17mm clearance hole is designed to accommodate an M16 metric fastener. The washer should sit flat against the mating surface and be adequately supported across its full bearing area.
A2 stainless steel provides good general corrosion resistance and is suitable for many indoor and outdoor applications. For marine, coastal, swimming-pool or highly corrosive environments, A4 stainless steel may be more appropriate.
Please note: DIN 9021 specifies a nominal 3mm thickness for this washer size. Actual measurements may vary slightly within manufacturing tolerances. The existing 1.5mm thickness shown in the product data should be corrected. If exact dimensions are critical, please check the supplied washer before use.
