SFB Fasteners is a focused manufacturer of bolts, nuts and washers — one factory, three product lines, and a quality system built for professional buyers.
Founded in Ningbo in 2008, SFB Fasteners deliberately chose to specialize. Instead of covering every fastener category at surface depth, we concentrate on bolts, nuts and washers — from M2 instrument nuts to M100 heavy hex nuts and stud bolts — and build our tooling, quality control and material sourcing around those three lines.
Today we operate cold-forming and machining lines with an annual capacity of 12,000 tonnes, supplying distributors, OEM buyers and engineering contractors in more than 40 countries across Europe, North America, the Middle East and Southeast Asia. Whether your drawing specifies DIN, ISO, ASTM or a customer-internal standard, our engineering team can cross-reference it and quote an equivalent.
Our promise is simple: standard-compliant product, traceable materials, honest lead times and a reply — not an auto-response — within 24 hours.
Every stage of production happens in-house or with audited partners — nothing is brokered.
Multi-station cold formers for standard nuts, CNC machining centres for specials and large sizes, with in-line thread tapping at 6H tolerance.
In-house zinc plating lines (white / blue / yellow) and audited HDG, Dacromet and black-oxide partners, with salt-spray validation per lot.
Thread gauging, hardness and proof-load testing on every batch; spectral analysis confirms material grade before forming.
Export-standard packing (20–25 kg cartons on fumigated pallets), Ningbo port 40 km away, FOB / CIF / DDP terms supported.
Every shipment is backed by objective evidence — not marketing claims.
Certified quality management system covering production, inspection and export handling.
Mill test certificates with chemical composition and mechanical properties, traceable to heat numbers.
Compliance declarations for surface treatments and base materials, available per shipment.
Factory founded in Ningbo with two cold-forming lines producing standard hex nuts for the domestic market.
First export orders to European distributors; DIN and ISO product range expanded to washers.
ISO 9001 certification achieved; CNC tapping lines installed for consistent 6H thread quality.
Heavy hex and structural product lines (A194, EN 14399) launched for the North American market.
Hot-forming and thread-rolling lines added for hex bolts, stud bolts and threaded rod — completing the bolts, nuts and washers assembly range.
Annual capacity reaches 12,000 tonnes with exports to 40+ countries.
Tell us what you're buying today — we'll show you how a focused factory does it better.