Cixi, Ningbo · heading, heat treatment and coating under one roof

Industrial fasteners with the MOQ printed on the page.

Q: What is the minimum order quantity?

Standard SKUs start at 500 pcs, and most sit between 5,000 and 20,000 pcs; each product page states its own floor and pack multiple. Custom parts are quoted from about 10,000 pcs or 500 kg, because a heading die has to be paid for by the run.

Q: How quickly will I get a price?

One business day for a standard SKU once we have a quantity and a destination port. A drawing review can take two — and if something is missing we email the question instead of holding the RFQ.

Q: Do you supply mill certificates and test reports?

Yes. EN 10204 3.1 for the wire rod heat, an ISO 898-1/-2 test report for the lot, coating thickness and the salt-spray coupon. FAI and PPAP level 3 are available on request. We are ISO 9001:2015, not IATF 16949, and we say so before an audit does.

Q: Can you ship to the EU or the US with the duties in force?

We quote FOB, CIF or DDP and declare the true origin. EU anti-dumping duties on headless screws run 54.7% to 72.3%, and US Section 301 stacks with Section 232 on steel content. The duty is paid by the importer of record, but the HS code, origin declaration and invoice wording your broker needs to calculate it come with the quote.

Q: What can I check before placing an order?

Up to five pieces from stock, freight collect; a sample lot inspection report for the SKU you are considering; and the mill certificate for the heat currently in production.

Q: Do you make to drawing?

Yes — PDF, STEP or a dimensioned photo. We reply with the standard we would make it to, the tolerance we cannot hold, and the die cost. If the part is outside cold heading, we say so instead of quoting.

ianzai is a cold-heading fastener manufacturer in Cixi, Ningbo, China. We make hex bolts, nuts, washers, socket screws, threaded rod and anchors to DIN, ISO and ANSI/ASME — and we publish the minimum order quantity, the pack multiple and the price breaks on every SKU, so a buyer can price a container without a sales call.

Browse the catalogue Send a drawing

MOQ from: 500 pcs
Lead time: 15–20 days
Property class: 8.8 – 12.9
Quote back: < 24 h

DIN 933 · M12 × 60 · CL 8.8 LIVE SPEC

THREAD 6gTENSILE ≥ 800 MPaZn TRIVALENT

MOQ5,000

FROM$0.061/pc

ISO 9001:2015QMS audited annually

EN 10204 3.1Mill certificate, every lot

100%Optical sort, every run

24 monthsSamples and records retained

What goes wrong

Four failures that happen before the parts arrive.

None of them are about the price of a bolt. They are about whether the paperwork, the quantity and the coating survive contact with your receiving bay — and they are the four complaints we hear most often about the last supplier.

The certificate belongs to a different lot.

A mill certificate naming a heat number nobody can trace to the carton is decoration. It is also the first thing a receiving inspector checks.

How we handle itOne plant, one lot number. The carton label carries the lot; the lot resolves to a heat number, a heat-treat basket and a plating batch. MTC 3.1 ships with the lot, not on request.

The MOQ appears after you have already quoted your customer.

Chasing a floor across three emails is how a two-day quote becomes a two-week one — and how you commit to a price you cannot actually buy at.

How we handle itEvery SKU states its MOQ, pack multiple and price breaks. The stepper refuses a smaller quantity, and the server refuses it again on submit.

The coating is thinner than the drawing says.

Zinc at 4 µm instead of 8 µm does not fail on arrival. It fails in the second winter, on a part nobody can return.

How we handle itCoating thickness is measured per plating batch by magnetic gauge or XRF, and the reading goes onto the lot report beside the salt-spray coupon.

The quote leaves out what decides the landed cost.

A unit price without pack multiple, lead time, Incoterm and HS code is not a price. It is an opening position.

How we handle itQuotes come back with unit price, MOQ, pack, lead time, Incoterm and HS 7318 listed, so your broker can price duty before you commit to a PO.

Export market · checked November 2026

The tonne is getting cheaper. The class is getting dearer.

Read together, those four lines say the market has stopped competing on tonnes. Volume still grows, but the price that holds up is attached to a property class, a certificate and a traceable lot — which is the part of the order we can actually control.

China fastener exports, 2025: 6.24 Mt
Export value, 2025: US$11.9 bn
Average export price, H1 2026: +2.0%
Bolts rated ≥ 800 MPa, H1 2026: +13.5%

Source: China Customs, HS 7318, as reported by Fastener Expo Shanghai. Duty, origin and documents →

Catalogue

Six families, one tolerance philosophy.

Every part is dimensioned to a published standard. Where a drawing calls for a non-standard length, thread or coating, we quote the tooling before we quote the parts — and we say which dimension we cannot hold.

5 SKUs

Bolts

Hex, carriage, eye and U-bolts for structural and mechanical joints.

View range 3 SKUs

Nuts

Hex, flange and nylon-insert lock nuts, proof-loaded to ISO 898-2.

View range 2 SKUs

Washers

Flat and spring washers punched or fine-blanked from strip.

View range 3 SKUs

Screws

Socket head cap, set and self-drilling screws for machine and sheet work.

View range 1 SKU

Studs & threaded rod

DIN 975 threaded rod, cut and chamfered to length.

View range 1 SKU

Anchors

Wedge anchors for cracked and uncracked concrete.

View range

Order volume

The minimum order is on the page, not in the fine print.

Each SKU carries its own MOQ and pack multiple. Quantity breaks start at the MOQ and step up in round thousands, so a buyer can price a container before asking for a quote — and the figure they see is the figure the quote comes back with.

Quantity breakUnit priceLine value

5,000 pcs$0.086$430.00

20,000 pcs$0.074$1,480.00

100,000 pcs$0.061$6,100.00

DIN 933 · M12 × 60 · zinc plated · FOB Ningbo

MOQ per SKU, editable in the sales console. Change a floor and the storefront, the quantity stepper and the server-side check all move together.
Pack multiples enforced. Order in 500s, not 537s — no re-packing charge, no surprise on the packing list.
Server-authoritative pricing. The line value in your RFQ is recalculated on submit; a tampered browser price never reaches the sales desk.

Selected SKUs

Stocked and quoted every week.

All 15 products

MOQ 5,000

DIN 933 · ISO 4017

Hex Head Bolt

Fully threaded hex bolt, property class 8.8 as standard, M6 to M30. The workhorse fastener for steel structures, machinery frames and general assembly.

From $0.061/pc at 100,000 pcs

Specs

MOQ 10,000

DIN 934 · ISO 4032

Hex Nut

Standard hex nut, class 8, proof-loaded to ISO 898-2. M6 to M30 with matching DIN 933 bolts.

From $0.028/pc at 200,000 pcs

Specs

MOQ 20,000

DIN 125 · ISO 7089

Flat Washer

Hardness-controlled flat washer, 200 HV, for distributing clamp load under bolts and nuts.

From $0.0078/pc at 500,000 pcs

Specs

MOQ 3,000

DIN 912 · ISO 4762

Socket Head Cap Screw

Class 12.9 alloy socket screw with a machined hex socket and controlled decarburisation. M5 to M20.

From $0.098/pc at 50,000 pcs

Specs

Under one roof

From wire rod to sealed carton, without a subcontractor in between.

Heading, rolling, heat treatment, plating and optical sorting run in the same plant in Cixi. That is what keeps a 15-day lead time credible on a repeat order — and what lets us answer a dimensional question without waiting for a third party.

See the process

01
Cold heading
2-die 3-blow headers, M4 – M30, up to 120 pcs/min
02
Thread rolling
6g / 6H, rolled after heat treatment where the standard requires it
03
Heat treatment
Continuous mesh-belt quench and temper to 8.8 / 10.9 / 12.9
04
Surface finishing
Alkaline zinc, hot-dip galvanized, zinc flake, black oxide
05
Inspection
Tensile, proof load, hardness, salt spray, thread gauges
06
Packing
100% optical sort, weighed cartons, pallet per your label spec

Quality

Numbers we can put in writing.

Proof load: ISO 898-2
Salt spray: 96 – 480 h
Traceability: Heat no.
Sorting: 100%

Before you order

The questions buyers ask before the first PO.

Anything not here, email sales@ianzai.com — a person answers, usually inside a shift.

What is the minimum order quantity?

Standard SKUs start at 500 pcs, and most sit between 5,000 and 20,000 pcs; each product page states its own floor and pack multiple. Custom parts are quoted from about 10,000 pcs or 500 kg, because a heading die has to be paid for by the run.

How quickly will I get a price?

One business day for a standard SKU once we have a quantity and a destination port. A drawing review can take two — and if something is missing we email the question instead of holding the RFQ.

Do you supply mill certificates and test reports?

Yes. EN 10204 3.1 for the wire rod heat, an ISO 898-1/-2 test report for the lot, coating thickness and the salt-spray coupon. FAI and PPAP level 3 are available on request. We are ISO 9001:2015, not IATF 16949, and we say so before an audit does.

Can you ship to the EU or the US with the duties in force?

We quote FOB, CIF or DDP and declare the true origin. EU anti-dumping duties on headless screws run 54.7% to 72.3%, and US Section 301 stacks with Section 232 on steel content. The duty is paid by the importer of record, but the HS code, origin declaration and invoice wording your broker needs to calculate it come with the quote.

What can I check before placing an order?

Up to five pieces from stock, freight collect; a sample lot inspection report for the SKU you are considering; and the mill certificate for the heat currently in production.

Do you make to drawing?

Yes — PDF, STEP or a dimensioned photo. We reply with the standard we would make it to, the tolerance we cannot hold, and the die cost. If the part is outside cold heading, we say so instead of quoting.

Next step

Send a drawing, a standard number, or just a quantity.

Quotes go out within one business day with unit price, MOQ, pack multiple, lead time and the Incoterm you asked for. No account required to get a number.

Build an RFQ sales@ianzai.com