IANZAI FASTENERS · NINGBO
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DIN 931 · ISO 4014 IANZAI · TECHNICAL DATA NOT TO SCALE L = 80 mm PLAIN SHANKb = 2d + 6THREAD START
DrawingTL-HB931-TD
RevisionRev. 04 · 2026
Unitsmm
Download spec sheet (.txt)

Documents & logistics

  • EN 10204 3.1 MTC
  • ISO 898-1
  • RoHS
Lead time
18 – 22 days
Port of loading
Ningbo / Shanghai
Samples
Up to 5 pcs, freight collect
Packing
25 kg carton, 36 cartons per pallet
HS code
7318
How this lot is tested →

DIN 931 · ISO 4014 · Partial thread (b = 2d + 6)

Hex Head Bolt DIN 931 / ISO 4014

Partially threaded hex bolt for shear-critical joints where an unthreaded shank must bear the load.

Size range
M8 – M30
Lengths
40 – 300 mm
Property class
8.8 · 10.9 · A2-70
Lead time
18 – 22 days
Packaging
25 kg carton, 36 cartons per pallet
Weight
0.062 kg/pc at M12 × 80

Finishes quoted

  • Zinc plated (clear trivalent)
  • Hot-dip galvanized
  • Black oxide
Minimum order 5,000 pcs
Pack multiple 500 pcs

Add 15,000 pcs to reach the next break at $0.079/pc.

Qty (pcs)USD / pcLine value
5,000 $0.092 $460.00
20,000 $0.079 $1,580.00
100,000 + $0.066 $6,600.00
Estimated line value $460.00
$0.092/pc · FOB Ningbo
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No payment online. Submit an RFQ and a quote with freight, duty basis and lead time comes back within one business day.

Detail

What the drawing controls.

Same heading and heat-treatment line as the DIN 933, with thread length held to b = 2d + 6 for lengths up to 125 mm. The unthreaded shank gives a tighter fit in reamed or clearance holes and keeps the thread out of the shear plane. Class 8.8 in stock; 10.9 and stainless on request.

Typical applications

  • Structural bolting
  • Heavy equipment assembly
  • Bridge and rail fittings

More on the family: how to specify bolts →

Specification — TL-HB931
StandardDIN 931 · ISO 4014
ThreadPartial thread (b = 2d + 6)
Size rangeM8 – M30
Lengths40 – 300 mm
Property classes8.8, 10.9, A2-70
FinishesZinc plated (clear trivalent), Hot-dip galvanized, Black oxide
Minimum order5,000 pcs
Pack multiple500 pcs
Lead time18 – 22 days
Packaging25 kg carton, 36 cartons per pallet
Unit weight0.062 kg/pc at M12 × 80
CertificatesEN 10204 3.1 MTC · ISO 898-1 · RoHS

Before the PO

What to specify when you order this part.

Send these six lines with the enquiry and the first reply is a price, not a question.

  • Standard or drawing — DIN 933, ISO 4032, ASTM A193 B7 — or a dimensioned PDF/STEP.
  • Size and length — Thread size, length, and the length convention the drawing uses.
  • Property class — 4.8, 8.8, 10.9, 12.9, A2-70, A4-80 — and the joint’s preload, if it has one.
  • Finish — Zinc trivalent, hot-dip galvanized, zinc flake, black oxide, plain.
  • Quantity — Per size, per shipment, and annual volume if you have it.
  • Destination — Port or city and the Incoterm, so freight is in the first number.

Paperwork

What ships in the carton.

Documents are issued per lot, not per year. The lot number on the label is the key to all of them.

DocumentCovers
EN 10204 3.1Mill test certificate for the wire rod heat — chemistry and mechanical properties.
ISO 898-1 / -2Tensile, proof load and hardness results for the production lot.
Coating reportThickness readings per plating batch, with the salt-spray coupon reference.
FAI / PPAP 3Ballooned drawing and full dimensional report. On request, before the run.
RoHS · REACHDeclaration of conformity for the coating and material.
Packing listLot number, carton count, gross and net weight, HS 7318 for the broker.

Duty, origin and the full document list →

Before you order

Questions the sales desk actually gets.

Anything else, email matrixgrowth@foxmail.com — a person answers, usually inside a shift.

What is the minimum order quantity for this part?
This SKU starts at 5,000 pcs and steps in multiples of 500. The stepper will not accept a smaller quantity, and the quote desk will not quietly re-quote one.
Can I get samples before ordering?
Up to five pieces from current stock are free; you cover the courier. For a production-representative sample from a new die, allow 5 – 8 working days and a tooling charge that is credited against the first order.
Which documents ship with the lot?
EN 10204 3.1 for the heat, an ISO 898 test report for the lot, and coating thickness with the salt-spray coupon. FAI and PPAP level 3 are quoted separately because they are built per part number.
Which Incoterms do you quote?
FOB Ningbo or Shanghai as standard, CIF to your port on request, and DDP where we have a cleared forwarder. The RFQ form asks for your port so the first quote already includes freight.
How is the unit price calculated?
From the break at or below your quantity — not an average. Quantities between breaks pay the lower break’s price, which is why the line total is recalculated on the server when you submit.
Can you make a non-standard length or thread?
Yes. Send the drawing, or the standard plus the deviation. Tooling is quoted separately, and we will say plainly if the tolerance is outside what cold heading can hold.

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