Global Leader in Industrial Fasteners & CNC Parts
Shenzhen Suntech Industrial Fasteners Co....
Shenzhen Suntech Industrial Fasteners Co. Limited is a company with a full line of production, selling, trading and importing with updated manufacturing facilities and professional technology. which mainly produces CNC parts，traditional turning parts and milling parts, and with years of manufacturing and exporting experience.
Currently, our products are sold worldwide, with 80% exported to developed European countries. Our parts are widely used in small home appliances , optical lenses, optical systems, flash lights and automotive lines etc., for example, VVT, Throttle control shaft, automobile pipe joint, optical instrument , conductive pin, terminal pin, sleeve, nipple, insert nuts, busing, fitting and plungers.
Suntech has acted in “Success starts with good services and good quality”, as well as continued innovation. The products are known as “green products” and meet international and ROHS standards. Meanwhile we can provide third-party certification if customers require them (Such as SGS report).
Our company has for sure its own core strategy and perfect business ideals and management models. Each processing will be controlled strictly to ensure the highest quality with the best price.
Frequently Asked Questions
Suntech operates two integrated divisions under one roof for supply chain consolidation benefits: (A) Industrial Fasteners Division — standard catalog + custom engineered: (1) Threaded fasteners — hex head bolts DIN 931/933/912, socket head cap screws ISO 4762, flanged bolts DIN 6921, carriage bolts, U-bolts, eye bolts, sizes M1.6–M30, lengths up to 300 mm; grades 4.8 / 6.8 / 8.8 / 10.9 / 12.9; (2) Nuts — hex nuts DIN 934, nylon insert lock nuts DIN 985, flange nuts DIN 6923, weld nuts, clinch nuts, rivet nuts, cap nuts; (3) Washers — flat DIN 125/126, spring DIN 127/7980, external/internal tooth lock, wave, spherical, Belleville disc; (4) Custom cold formed specials — shoulder bolts, step screws, custom head geometry, combined fastener assemblies. (B) Precision CNC Machining Division — all custom: CNC milled, CNC turned, Swiss-type, mill-turn, ground components as detailed in our CNC capabilities brochure. The consolidation advantage: 40% of our clients buy both fasteners + CNC parts on the same PO, reducing their supplier count, QC overhead, and logistics cost by ~18% on average.
We are differentiated from commodity fastener trading companies or single-line cold heading shops in six ways: (1) We are a manufacturer, not a trader — own 38 cold heading + thread rolling machines + 4 heat treatment + 3 plating lines on-site under one roof, all auditable; (2) Engineering support on custom specials — 8 in-house tool designers who run SolidWorks + AutoForm forming simulation before accepting an order, so we catch formability issues that cause tool breakage and missed delivery; (3) Integrated in-house secondary ops — CNC turning/milling after cold heading, thread rolling, centerless grinding, laser marking, PEM patch lock adhesive, washer assembly; (4) Traceability depth — each lot is marked with 2D DataMatrix UII code that links to raw material heat number, die number, cold heading machine operator, heat treatment cycle log, plating batch, inspection records — 10 years online; (5) Compliance — IATF 16949, ISO 14001, EU REACH + US RoHS compliant for every standard chemical; (6) Customer longevity — average OEM relationship length >7 years, with 2 accounts dating back 13+ years. These are the metrics Tier-1s look for in a strategic partner.
Full coating matrix with in-house + approved partner lines: (1) Zinc electroplating — trivalent Cr(III) passivation (RoHS-compliant, no Cr VI), clear / blue / yellow / black / olive drab colors; 72–500 hours salt spray per ASTM B117; (2) Zinc alloy plating — zinc-nickel (ZnNi 12–18% Ni) 1,000–1,500 h NSS, zinc-iron, zinc-cobalt; preferred for automotive underhood; (3) Zinc flake (lamellar) coatings — Geomet® 321/500B, Magni® 565/570, Dörken MKS® Delta Protekt KL100 + topcoat KL120; 720–1,500 h NSS without red rust, no hydrogen embrittlement risk; critical for high-strength grade 12.9 bolts; (4) Mechanical plating — zinc 5–25 µm, tin, copper, for ultra-high-strength parts where electroplating hydrogen risk is unacceptable; (5) Hot-dip galvanizing (HDG) per ISO 10684 — for outdoor structural wind/utility/solar applications (M12–M30 sizes); (6) Organic topcoats / anti-seize — PTFE (Teflon), molybdenum disulfide (MoS2), silver plated, Xylan® for controlled torque coefficient applications; (7) Passivation — stainless steel citric vs. nitric per ASTM A967 and AMS 2700; (8) Phosphate coatings — manganese (for oil retention on gears), zinc (paint base). Coating certification bodies include TÜV, Rohs, REACH. Custom specifications quoted on request.
Our Fastener New Product Introduction (NPI) process: (1) Concept review — buyer sends drawing + PPAP level + volume estimate; our tool engineer runs forming simulation in 1 business day and flags any risks (head-fill, thread-rolling die life, stripping torque behavior); (2) Quotation + DFM report — cost break-down by operation, comparison vs. the closest DIN/ISO standard alternative (in case going standard reduces cost), and lead time; (3) Order tooling — if custom dies/punches are needed, they are manufactured in our on-site EDM + grinding tool room typically 5–7 days; (4) First article (FA) samples — 50–200 piece trial run, full FAIR (AS9102) dimensional report, material certificate, coating test report, and optional torque-tension / hardness / salt spray test data; (5) FA approval — sign-off by the buyer quality team, Process Control Plan is locked, SPC parameters are established for production; (6) Production ramp-up — 1st production lot 2× inspected and Cpk study run on 50 pieces, once Cpk>1.67 regular production begins. NPI timeline: 7–14 days for typical custom specials, 25–35 days for complex 5-die progressive form or assemblies.
Yes — high-volume repeat accounts qualify for our SmartSupply™ vendor-managed inventory with 3 models: (1) Domestic China buffer — 4–6 weeks of safety stock held in our Shenzhen finished goods warehouse; orders release via 830 EDI or email, ship within 24h; (2) Regional consignment — we ship bulk inventory to a 3PL in Hamburg (Germany), Los Angeles (USA), or Yokohama (Japan) managed by our forwarder partner; buyer pulls Kanban quantities and pays only upon withdrawal, eliminating inventory carrying cost; (3) Just-in-Time line feed — for 2 customers with >US$3M/yr spend we maintain 12-week rolling forecast and ship air + sea mix synchronized to their ERP production schedule, with weekly delivery windows and stock-out penalty clause (10% of PO value if we miss a committed delivery date). Current VMI program active for 11 accounts, 3.1M pieces/year shipped under VMI terms, 99.7% on-time delivery performance 2024. The process integrates smoothly with MRP systems (SAP S/4HANA, Oracle Cloud, NetSuite, Infor LN, MS Dynamics).
