DIN 557 M8 square nut A2
DIN 557 M8 square nut A2 from stock PVGroup.plThis is inventory left over from completed projects—brand new goods, sold while supplies last.
The most important features
- Standard: DIN 557 - square nut; equivalents PN 82151, CSN 021624, UNI 5597; sizes M5–M16
- Material: A2 (or A4) stainless steel; steel version class 05
- PV Application: M8 Square Nut for Photovoltaics, DIN 557
- Thread: M8
- Brand new product from stock, sale while supplies last
Application
Sliding into the groove of the mounting profile, it doesn't rotate when the M8 Allen screw is tightened—this allows the clamp to be tightened with a single wrench, from above. Most often purchased together with DIN 912 M8 screws from the same package.
Technical Specifications
| Parameter | Value |
|---|---|
| Norma | DIN 557 – square nut; equivalents PN 82151, CSN 021624, UNI 5597; sizes M5–M16 |
| Material | A2 (or A4) stainless steel; in the steel version, class 05 |
| PV Application | M8 square nut for photovoltaics, DIN 557 |
| Thread | M8 |
Application in a photovoltaic installation
Stainless steel connectors are standard in photovoltaic installations not because of their appearance, but because the structure operates outdoors for several years. Galvanized components lose their coating more quickly in the same location, and replacing a single screw under the module means disassembling its mounting—the labor cost is many times greater than the difference in the price of the connector.
When assembling an installation, it's worth factoring in spare parts. Some connectors get lost on the jobsite, others need to be replaced when adjusting the row alignment, and buying a few more later is rarely cost-effective given the shipping costs. That's why we sell them in quantities tailored to actual installation usage, not individually.
Be sure to match the length to the thickness of the components being connected. A screw that's too short won't utilize the full height of the nut, while one that's too long will protrude beneath the module and may interfere with the frame or cabling running beneath the structure.
DIN 557 M8 Nut - What to Pay Attention to When Choosing One
When purchasing this item, check three things: compatibility with existing equipment on site, site conditions, and the quantity needed for the entire project. Photovoltaic system components operate outdoors for several years, in full sunlight and with fluctuating temperatures, so the choice of material and workmanship is crucial to the durability of the entire installation.
If you are collecting material for a specific installation, it is more convenient to take everything from one delivery - the remaining items from the same group can be found in the category of fasteners and clamps , and all surplus stock in the category of Stock.
Where does this stuff come from?
We sell inventory left over from closed projects and deliveries. The merchandise is brand new and covered by the same returns and refunds policy as the rest of our offerings. The only difference is that quantities are limited and will not be restocked—once the stock is depleted, the item will be removed from the store.
Minimum order and price calculation method
We sell this item from 100 pieces. The price listed for each item is for a single item, so the minimum order value is 100 times that amount. This threshold is based on inventory accounting: for small items, the time required to deduct and pack several items costs more than the item itself. However, when ordering a full package, this cost is spread across all items, allowing the unit price to drop that low.
The quantity ordered increases incrementally in the cart, so you can't accidentally place an order below the threshold. Above the threshold, you can purchase any number of items until stocks last—which is limited to what's left in stock.
Delivery and pickup
Orders are shipped from our warehouse. Shipping costs depend on size and weight—small items are shipped as a parcel, while items longer than a standard parcel require pallet shipping, which is visible in the shopping cart after adding items. For orders with multiple items, shipping costs are calculated once for the entire shipment, so collecting the materials for a single order is cheaper than shipping several items separately.
You can also collect the goods in person at our warehouse in Bytomiu — pickup is free. For low-value items, this is often the most reasonable option, as shipping costs can be as high as the order itself. It's worth confirming availability before arrival, especially for last-minute items.
Frequently Asked Questions
What does A2 mean in the description?
A2 is the designation for stainless steel used in connectors – chosen in PV installations for its corrosion resistance after many years of use on the roof.
Do the elements fit profiles from other manufacturers?
These are standardized metric connectors. Check the thread dimensions and mounting space in your system to ensure they fit your specific profile.
Can I collect the goods in person?
Yes, personal collection in Bytomiu is free—you select it in your cart. For small items, this is often the most reasonable option, as shipping costs can be as high as the value of the item itself.
How many pieces are available?
This is a surplus stock item – quantities are limited and displayed next to the product. Once stocks are depleted, the item will be removed from the offer.
Opinions
There are no reviews yet.