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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.
