Best seller
Hex Bolts & Heavy Structural
M6–M64, full / partial thread, HDG, Geomet 500B. Bridges, steel structures, wind towers.
ISO 9001 : 2015 • IATF 16949 • CE • 40+ COUNTRIES
KING DING
KING DING
Bolts that hold the world together.
From M3 micro-screws to M64 structural bolts — KINGDING designs, forges and machines 12 000+ fasteners and precision metal parts. 28 years, 380 machines, 0.01mm tolerance, 99.8% on-time delivery.
380+CNC machines, cold headers & hot forging lines running 24/7 in 42 000 m² Ningbo campus.
28Years manufacturing
Founded 1997, family-owned, now 520 engineers & operators.
12000+SKUs in stock
Stainless, carbon, alloy, brass, titanium. Same-day dispatch.
40+Export countries
EU, USA, Middle East, SEA. DIN / ISO / ASTM / JIS certified.
99.8%On-time delivery
VMI warehouses in Rotterdam & Houston.
HEX BOLTS ● FLANGE NUTS ● WEDGE ANCHORS ● SELF-TAPPING ● TITANIUM CNC ● U-BOLTS ● THREADED RODS ● RIVETS ● HEX BOLTS ● FLANGE NUTS ● WEDGE ANCHORS ● SELF-TAPPING ● TITANIUM CNC ● U-BOLTS ● THREADED RODS ● RIVETS ●HEX BOLTS ● FLANGE NUTS ● WEDGE ANCHORS ● SELF-TAPPING ● TITANIUM CNC ● U-BOLTS ● THREADED RODS ● RIVETS ● HEX BOLTS ● FLANGE NUTS ● WEDGE ANCHORS ● SELF-TAPPING ● TITANIUM CNC ● U-BOLTS ● THREADED RODS ● RIVETS ●
01 — About KINGDING
Not just fasteners.
Precision you can torque.
1997 → 2026From 3 cold headers to fully automated lights-out production with lab-tested traceability.
KINGDING (kingding.net) is a Ningbo-based manufacturer of industrial fasteners and custom precision components. We control everything in-house: wire drawing, cold & hot forging, thread rolling, heat treatment, zinc / Geomet / Dacromet coating, CNC milling and 3D measurement.
- ✓Full traceability. Each lot with material cert 3.1, hardness, salt-spray and torque reports. QR code on every box.
- ✓Own tooling shop. 12 wire-EDM + 5-axis CNC make custom dies in 72 hours. No MOQ trap for prototypes.
- ✓Lab & testing. Spectrometer, 100T tensile, 1000h salt spray, metallography. PPAP / APQP for automotive.
- ✓Green forging. Solar roof 2.1 MW, closed-loop pickling, 94% scrap recycled. ISO 14001.
42k m²
FACTORY AREA
FACTORY AREA
520
TEAM MEMBERS
TEAM MEMBERS
68
PATENTS
PATENTS
02 — Catalogue
6 product universes
DIN 933 / 931 / 934 / 985 / 912 / ISO 4762 / ASTM A325 / F594. Stainless A2/A4, 8.8 / 10.9 / 12.9, brass, titanium Gr5.
±0.01 mm
CNC Turned & Milled Parts
Swiss lathes, 5-axis mills. Shafts, spacers, custom nuts. Prototype in 5 days.
A2 / A4
Nuts, Washers & Threaded Rods
Flange, nyloc, cap, square. EPDM bonded washers for roofing. 1m / 2m / 3m rods.
ETA approved
Anchors & Concrete Fixings
Wedge, sleeve, chemical, drop-in. Cracked concrete C20/25, seismic C2. 1200kg pull-out.
Ruspert coating
Self-Drilling & Roofing Screws
Hex EPDM, wafer, drywall, chipboard. 1000h salt spray, no red rust. Color matching RAL.
OEM / ODM
Hot Forging & Specials
U-bolts, eye bolts, turnbuckles, titanium. Drawing → sample in 10 days. PPAP Level 3.
03 — Inside the factory
From wire rod to torque certificate in 8 steps
01
Wire & Material
Baosteel / POSCO wire, spectrometer check, spheroidizing annealing.
02
Cold Forging
5-station headers, 120–400 pcs/min, in-line vision for cracks.
03
Thread Rolling
Flat & planetary dies, Class 6g/6H, ring-gauge 100% for automotive.
04
Heat Treatment
Continuous mesh-belt furnace, 8.8–12.9, hardness HRC 22–44, de-embrittlement.
05
Coating
Zinc, Zn-Ni, Geomet, HDG, Ruspert. 1000h NSS, torque-tension control.
06
CNC Finishing
Secondary machining, drilling, knurling for specials & low-volume.
07
Sorting & Lab
Optical sorting 0.02mm, tensile, salt spray, XRF thickness, RoHS.
08
Pack & Ship
Private label, VCI + desiccant, pallet fumigation, FOB Ningbo / DDP.
Quality promise
“If a KINGDING bolt fails, we pay the crane.” 0 PPM target for automotive lines.
— Ding Jian Guo, Founder & Chief Metallurgist. 38 years in fasteners, ex-FAW supplier auditor.
04 — Gallery
Steel, sparks & precision
05 — Clients
Trusted on 4 continents
⭐⭐⭐⭐⭐
“Switched 340 SKUs to KINGDING. Rejection rate dropped from 2.1% to 0.08%. Their Geomet coating passes 1200h with no white rust.”
Marcus H. — Procurement, WindTower GmbH
⭐⭐⭐⭐⭐
“PPAP in 9 days, full dimensional + material certs. They even redesigned our flange nut to save 11% weight.”
Sarah L. — SQE, Automotive Tier-1, Michigan
⭐⭐⭐⭐⭐
“Rotterdam VMI is gold. Stock always available, EDI orders, 48h delivery across Benelux. True partner.”
Youssef E. — Distributor, Dubai & Rotterdam
06 — FAQ
Questions? Torqued & answered.
MOQ 500 pcs for standard, 1 pc for CNC prototype. Lead time 15–25 days bulk, 5 days stock. DDP / DAP / FOB.
DIN, ISO, EN, ASTM, ASME, JIS, GB. Full range: property classes 4.8–12.9, stainless A2-70 / A4-80, brass CU3, titanium Gr2/Gr5. All dimensions verified with calibrated gauges and CMM.
Yes. Send STEP / PDF / sample. Our DFM team replies in 24h, tooling in 72h, first articles in 7–10 days with FAI report. NDA on request.
White / blue / yellow zinc, Zn-Ni, Geomet 321/500, Dacromet, HDG, Ruspert, black oxide + wax. From 96h to 1500h neutral salt spray. Torque-tension K-factor controlled 0.08–0.20.
IATF 16949 site, APQP, PPAP Level 1–5, MSA/SPC, 8D. 0 PPM target, traceability to heat number, 15 years record retention.
FOB Ningbo/Shanghai, CIF, DDP EU/USA via sea+rail+air. VMI hubs in Rotterdam and Houston. Pallet fumigation ISPM#15, private label & barcode.
07 — Newsroom
Fresh from the shop floor
Coatings, standards, factory upgrades and engineering guides. Click any card to open full article.
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Read full story →Need 10 000 bolts by next month? We’ve got the steel.
Send drawing or SKU list. Quotation in 12 hours, samples in 5 days, bulk in 20 days. No middlemen — direct factory price.
08 — Contact
Let’s build something that holds
Request quotation
Factory direct
No. 88 Dingfeng Road, Beilun, Ningbo 315800, China
Mon–Sat 8:30–18:30 (GMT+8)
SALES
[email protected]
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SUPPORT
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