We’ve got these in stock right now, usually ships within a week or so for the common sizes — 1/8'' to 4'' — but teh larger ones might add a few days depending on the run. They come packed in standard cartons, about 50 to 100 pieces per box depending on size, and we can do smaller quantities if you're testing a batch.

The hex shape makes a big difference when you're tightening in tight spots, gives you that extra grip without slipping, and the pickling treatment leaves a clean silver finish that resists surface rust pretty well. For most industiral pipe connections, the 150LB pressure rating holds up fine, but don't push it beyond that — it’s not built for high-pressure steam lines or anything like that.

Material choice is straightforward: 201 works for dry indoor lines, 304 is the standard for general use, and 316 is what you want if chlorides or marine environments are involved. Actually, we've seen buyers in chemical processing go with 316 almost exclusively, even when 304 would technically be okay — it's just safer that way.

ISO9001 and CE certifcation is standard, and our company provide COA with each order — just request it in notes. Manufacturing is casting, which gives a consistent dimension across the run, tighter tolerance than most stamped fittings for sure.

Minimum order is 100 pieces, but we can do a sample first — roughly 2 weeks lead time for that — and if you need custom thread lengths or a specific suface finish, just ask and we'll quote. One thing nobody asks but matters: the threads are ISO standard, so they'll mate with BSPP or NPT adapters without issue, but always double-check compatibility before committing to a large lot.

Anyway, the H28 model is what most warehouses go with for general-purpose hose connections — it's not flashy, but it basically gets the job done without hassle.
201 is the most economical grade, good for general indoor use. 304 offers better corrosion resistance for most industrial applications, and 316 is ideal for harsh environments like marine or chemical plants. You can pick whichever matches your working conditions.
Yes, samples are available. Just let us know your address, and we can ship a sample for you to test fit and quality before committing to the full MOQ.
Absolutely. Our H28 nipples come with ISO9001 and CE certifications, so you get consistent quality and full traceability for your industrial pipe projects.
For standard sizes like 1/2 inch in 304 stainless, we usually ship within 7–15 days after order confirmation. Custom sizes or larger quantities may take a bit longer.
Yes, our size range goes from 1/8 inch up to 4 inches, all rated for 150LB. So you can order larger diameters like 3 or 4 inches and they'll handle the same pressure.