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If you're expecting these to hold tight under insane torque or extreme cycling, you'll want to look at lock washers instead—this saddle design simply doesn't have that clamping force, but it's actually perfect for reducing vibration and adding friction in standard metric fasteners form M2 up to M10.
Most buyers go with the nickel-plated finish for general use, though Dacromet handles corrosion noticeably better if you're in a humid or chemically active enviroment, and the A type structure gives you a consistent spring action that we've seen hold up well in automotive sub-assemblies and machinery panels.
We usually hold stock on DIN137A spec, roughly 20 days lead time for anything outside teh standard M4-M8 range (check COA compliance if your QC is strict), and the carbon steel core means it'll deform predictably under load rather than cracking.
It's basically a curved wave spring gasket—not meant for high-tension joints, but it'll stop that intermittent rattle in a panel or bracket where a flat washer just slides around, and the 25+ year production standerd means you're getting consistent geometry across batches.
Anyway, for ordering you'll want to specify surfce treatment and whether you need the nickel or zinc plating (zinc is cheaper but less durable), MOQ is typically 10,000 pieces per size, and our company can provide the SDS and TDS on request—just confirm the lead time before you lock in the PO.
For the M2 size, our MOQ is typically 10,000 pieces. For larger sizes like M8 or M10, we can be a bit more flexible, but M2 runs are smaller and cost more to set up.
Yes, we can issue a mill certificate from the steel supplier along with our own inspection report. Just let your sales contact know what format you need — PDF or hard copy with the shipment.
For 50,000 pieces of M5 nickel-plated, expect about 15–20 working days after order confirmation. If you need Dacromet finish instead, add 5 more days for the coating cycle.
Yes, they're designed to fit standard metric bolts in the M2–M10 range. The inner diameter follows DIN137A specs, so you'll get a snug fit without needing oversized bolts.
They come packed in strong poly bags inside cartons, by size and finish. For example, M4 zinc-plated washers go in one bag per carton, and each carton is labeled with the spec and quantity.
