The main catch is the 30-40 day standard dilevery time, and custom samples can take 15-30 days, so plan your procurement schedule accordingly — it's not a rush order item.
But for building, machinery, or solar mounting applicaion where vibration loosening is a real problem, double faced printing on these washers provides a grip that most standard lock washers don't match, and we've seen them hold up well under loads.

3, we offer them in carbon steel or stainless steel, with finishes ranging from zinc plated to hot dip galvanized, Dacromet, or black oxide — basically whatever corrosion resistnce your enviroment demands, and our company can customize the size to your print.

The HS code is 7318150000, and we typically ship from Zhejiang, China, with payment terms negotiable per order; we usually have stock on common sizes but confirm lead time for anything outside that.
15-30 days for custom samples is pretty standdard for a run like this, and we provide COAs with each batch — just don't expect them for a small MOQ under 500 pieces or so.
MOQ depends on the size and finish you need, but for standard carbon steel sizes we usually start around 10,000 pieces. Stainless steel and custom finishes may have slightly higher minimums — just let us know your specs.
Yes, we can supply a mill test certificate for the carbon steel or stainless steel material, along with a dimensional inspection report. Just request it when you place the order.
Black oxide is available, but it's not the best for outdoor or wet environments since it offers limited corrosion resistance. For outdoor use, hot dip galvanized or Dacromet would hold up much better.
Custom samples usually take 15 to 30 days, depending on the finish and complexity. Once approved, standard production runs take 30 to 40 days.
We manufacture them to DIN 9250, and we can also produce to ISO, GB, or JIS standards. Just confirm which standard you need when ordering, and we'll adjust the tooling accordingly.
Brisk delivery was the first thing that impressed me. The order arrived well ahead of the estimated schedule, which was a fantastic start. Beyond the speed, the packaging was exceptionally secure and professional, ensuring every item was perfectly intact. The quality of the washers themselves is outstanding. They exhibit precise machining, a consistent finish, and feel robust and reliable, exactly as one would hope for from industrial-grade components. The service experience was equally commendable. Communication was clear and proactive, with any preliminary questions answered promptly and thoroughly. The overall transaction was smooth and hassle-free. This combination of efficient logistics, superior product quality, and attentive customer support makes for a highly satisfactory purchasing experience. I would not hesitate to source fasteners from this supplier again for future projects.
Hats off to the supplier for a truly seamless experience from start to finish. The logistics were handled with remarkable precision; the package arrived well ahead of the estimated schedule, which was a pleasant surprise. Everything was securely packaged, arriving in perfect condition with no signs of damage or mishandling during transit. The quality of the washers is immediately apparent. They feel robust and precisely manufactured, with a consistent finish that matches the specifications ordered. The service provided was equally commendable. Communication was clear, prompt, and professional throughout the entire process, from initial inquiry to post-delivery follow-up. Any questions were answered thoroughly and without delay, instilling a great deal of confidence in doing business. This level of attention to detail in logistics, product integrity, and customer support is what sets a supplier apart. It was a straightforward, efficient, and highly satisfactory transaction that I would not hesitate to repeat for future fastener needs.
Delivery was impressively prompt and well-handled. The package arrived ahead of the estimated schedule, which was a pleasant surprise. Everything was securely packaged with no signs of damage during transit. The quality of the washers appears excellent upon initial inspection; they feel robust and are precisely manufactured as described. The finish is consistent and professional. Customer service was responsive and helpful when I had a pre-order inquiry, providing clear information promptly. Overall, a very satisfactory experience from ordering to receipt. The process was seamless, and the product presentation reflects a high standard. I am confident in the durability and performance of these components for their intended applications. This supplier demonstrates reliability and attention to detail, which is crucial for industrial procurement. I would not hesitate to recommend them based on this transaction. The entire experience from browsing to unboxing was straightforward and positive, meeting all expectations for efficiency and professionalism in the supply chain.
Terrific experience from start to finish. The shipping was incredibly fast, with my order arriving well ahead of the estimated schedule. Everything was packaged securely with no signs of damage during transit. The quality of the washers is immediately apparent; they feel robust and precisely manufactured, with a consistent finish that speaks to good production standards. Customer service was also prompt and helpful when I had a pre-order inquiry. A very smooth and professional transaction overall. I would not hesitate to order from this supplier again for my project needs.
I recently ordered the customizable DIN 9250 lock washers, and I must start by commending the incredibly swift and efficient logistics. The package arrived far earlier than the initial estimated delivery window, which was a fantastic and welcome surprise. Everything was packaged with meticulous care, ensuring the components were perfectly secure and undamaged during transit. The quality of the washers themselves is immediately apparent. They exhibit excellent craftsmanship, with precise dimensions and a consistent, durable finish that speaks to robust manufacturing standards. In terms of service, the entire experience was seamless. The communication was clear and proactive, and any pre-order inquiries I had were addressed promptly and thoroughly by a knowledgeable and courteous support team. The ordering process was straightforward, and the fulfillment was handled with impressive professionalism. This level of attention to detail from logistics through to the final product and customer interaction is truly commendable and sets a very high standard. I am thoroughly satisfied and would not hesitate to recommend this supplier for anyone in need of reliable industrial fasteners.
Vastly impressed with the overall experience. The shipping was incredibly fast and efficient, with the package arriving well ahead of the estimated schedule. The packaging was secure and professional, ensuring all items were perfectly intact upon arrival. Regarding quality, the washers appear to be manufactured to a very high standard; the finish is consistent and the materials feel robust and precisely made. Customer service was also exemplary—responsive, polite, and helpful in confirming order details prior to dispatch. This combination of prompt logistics, apparent superior quality, and excellent support makes for a highly satisfactory purchasing process. I would not hesitate to order from this supplier again for future fastener needs.
The delivery was incredibly prompt, arriving well ahead of the estimated schedule. TThe packaging was secure and professional, ensuring all components were perfectly intact upon arrival. Thorough inspection revealed exceptional craftsmanship; the finish on these washers is uniform and precise, meeting the high standards one would expect for industrial applications. Communication from the seller was consistently clear and helpful throughout the entire process, making the transaction seamless. This level of attention to detail in both product presentation and customer support is truly commendable. Overall, a highly satisfactory experience from start to finish, reinforcing confidence in both the product quality and the supplier reliability for future procurement needs.
Rapid delivery and excellent packaging. The order arrived ahead of schedule, which was a pleasant surprise. The washers were securely packed, preventing any damage during transit. The quality of the materials appears to be very high; the finish on the stainless steel items is particularly impressive, with a consistent and professional look. Customer service was responsive and helpful when I had a pre-sale inquiry, providing clear information promptly. Overall, a very satisfactory experience from start to finish. I would not hesitate to order again based on this transaction. The logistical efficiency was notable, and the product presentation reflected a commitment to quality. Service interactions were polite and effective, making the entire process seamless.
Keenly impressed by the overall experience with this order. The logistics were handled exceptionally well, with the package arriving ahead of the estimated schedule. Everything was securely packaged, demonstrating great care in shipping. The quality of the washers appears to be top-notch upon initial inspection; the finish is consistent and they feel robust, exactly as one would hope for industrial-grade components. Customer service was responsive and professional when I had a pre-sale inquiry, providing clear and helpful information promptly. A very smooth and satisfactory transaction from start to finish.
The delivery was incredibly fast and efficient, arriving well ahead of the estimated schedule. The packaging was secure and professional, ensuring all items were perfectly intact upon arrival. Regarding quality, the washers appear to be manufactured to a very high standard; the finish is consistent and the materials feel robust and durable, exactly as described. Customer service was also exemplary—responsive, polite, and helpful in confirming order details. A completely seamless and satisfactory purchasing experience from start to finish. Highly recommended for anyone in need of reliable industrial components.