Comprehensive fastening lines, forged flanges, and high-integrity sealing elements engineered to DIN, ISO, ASTM, and ASME specifications with complete EN 10204 3.1 certification.
DIN 933 specifies fully threaded hexagon head screws across diameter ranges from M1.6 through M100. In critical industrial applications across Denmark—from North Sea offshore energy installations in Esbjerg to specialized pharmaceutical process skid builds in Kalundborg—DIN 933 represents the primary standard for tapped-hole assemblies where a shank bolt (DIN 931) is structurally unsuitable due to clamping grip length constraints.
While the international standard ISO 4017 has formally superseded DIN 933 across European specifications, structural engineers and Scandinavian procurement managers must maintain acute awareness of key dimensional disparities. Crucially, across diameters M10, M12, M14, and M22, the width across flats (spanner size, s) differs between historic DIN and harmonized ISO standards. Utilizing DIN 933 tooling in an ISO 4017 environment can lead to torque application errors, tool slippage, or interference in tight structural clearances.
| Nominal Size | Pitch (P) Standard | Width Across Flats: DIN 933 (s) | Width Across Flats: ISO 4017 (s) | Head Height (k) | Tensile Stress Area As (mm²) | Recommended Property Class |
|---|---|---|---|---|---|---|
| M8 | 1.25 mm | 13.00 mm | 13.00 mm | 5.30 mm | 36.6 mm² | 8.8 / A2-70 / A4-70 |
| M10 | 1.50 mm | 17.00 mm | 16.00 mm | 6.40 mm | 58.0 mm² | 8.8 / 10.9 / A4-80 |
| M12 | 1.75 mm | 19.00 mm | 18.00 mm | 7.50 mm | 84.3 mm² | 8.8 / 10.9 / A4-80 |
| M14 | 2.00 mm | 22.00 mm | 21.00 mm | 8.80 mm | 115.0 mm² | 10.9 / 12.9 / 2205 |
| M16 | 2.00 mm | 24.00 mm | 24.00 mm | 10.00 mm | 157.0 mm² | 8.8 / 10.9 / A4-80 |
| M20 | 2.50 mm | 30.00 mm | 30.00 mm | 12.50 mm | 245.0 mm² | 8.8 / 10.9 / A4-80 |
| M22 | 2.50 mm | 32.00 mm | 34.00 mm | 14.00 mm | 303.0 mm² | 10.9 / 12.9 / HDG |
| M24 - M64 | 3.00 - 6.00 mm | Per Standard | Per Standard | 15.00 - 40.00 mm | 353.0 - 2676 mm² | Carbon Alloy & Duplex |
From the exposed wind corridors of the Kattegat to the ultra-clean processing corridors of Jutland, our fasteners meet rigorous national and European directives.
Turbine nacelle housings, internal mechanical gearings, yaw drive mountings, and secondary steel connections in offshore platforms demand high-tensile 10.9 hot-dip galvanized and zinc-flake coated DIN 933 bolts. Fully threaded geometry allows variable plate clamping in specialized internal brackets exposed to severe cyclic offshore vibration.
Compliant with EHEDG (European Hygienic Engineering & Design Group) requirements, stainless steel DIN 933 bolts in AISI 316L (A4-70 / A4-80) ensure absolute zero particulate collection and resist harsh CIP (Clean-in-Place) chemicals such as sodium hydroxide and nitric acid solutions widely utilized in Arla and Carlsberg processing equipment.
Denmark leads Europe in municipal district heating networks and green hydrogen/ammonia Power-to-X production facilities (such as those in Kassø and Fredericia). High-temperature ASTM A193 B7 and chromium-molybdenum DIN 933 fasteners maintain joint integrity across pressurized thermal fluid systems operating above 130°C under fluctuating pressure profiles.
Harbor cranes, Ro-Ro ferry ramps, and ship propulsion systems along Frederikshavn, Odense, and Aarhus require corrosion-resistant A4-80 stainless and duplex steel 2205 (1.4462) DIN 933 bolting. These prevent pitting and crevice corrosion under prolonged splashing and continuous immersion in high-salinity Baltic and North Sea waters.
Driven by strict national climate goals and stringent European Union directives, fastener supply chains into Scandinavia are undergoing fundamental structural evolution.
With the enforcement of the Carbon Border Adjustment Mechanism (CBAM), Danish EPCs require precise carbon footprint reporting per metric ton of fasteners. We actively supply fasteners fabricated using electric arc furnace (EAF) melts with traceable Environmental Product Declarations (EPDs), lowering scope 3 emissions for municipal infrastructure projects across Denmark.
In property classes 10.9 and 12.9, conventional acid pickling prior to hot-dip galvanizing presents critical hydrogen embrittlement hazards. Danish wind energy and port infrastructure developers increasingly mandate ISO 10683 zinc-flake coatings (e.g., Geomet, Delta-Protekt), providing >1,500 hours neutral salt spray resistance without electrolytic hydrogen exposure.
Digital Product Passports (DPP) and automated logistics require direct head-stamp heat traceability on every DIN 933 bolt. Scandinavian wind turbine manufacturers and defense sub-contractors require mill certificate data mapped directly to physical lot batches to guarantee zero counterfeit material penetration across Danish supply chains.
Combining heavy forging heritage with European Pressure Equipment Directive compliance, we deliver uncompromising dimensional and metallurgical reliability.
Our manufacturing operations strictly comply with the European Pressure Equipment Directive (PED 2014/68/EU), ensuring certified material chemistry, impact resistance, and elongation characteristics required for high-risk pressurized industrial systems.
As one of India's top three hot-dip galvanized fastener exporters, we command dedicated spin-galvanizing lines operating to EN ISO 10684. Threads are precisely undercut or tapped oversize to guarantee smooth engagement without flaking or binding.
Every single batch undergoes optical emission spectrometry (OES), Charpy V-notch impact testing at -20°C or -46°C, tensile/proof load evaluation, and magnetic particle non-destructive examination prior to dispatch.
Beyond standard 8.8 and 10.9 carbon steel, we forge and machine DIN 933 screws in Duplex 2205 (1.4462), Super Duplex 2507 (1.4410), Hastelloy C276, Monel 400, Silicon Bronze, and Phosphor Bronze for specialized offshore petrochemical duties.
With consolidated sea-freight routing via Port of Rotterdam, Hamburg, and direct feedering into Aarhus and Copenhagen, our export division provides smooth DDP / CIF commercial terms with standardized EU customs documentation.
Need non-standard DIN 933 executions? We manufacture fine pitch (DIN 961), custom extended lengths up to 1,000mm, precision shank steps, and custom thread tolerances (6g, 6h, 4h6h) precisely matching your engineer's drawings.
Essential regulatory, technical, and logistical details addressed for Scandinavian project managers and QA engineers.
In most cases, yes, because length, thread pitch, and tensile capacity are functionally identical. However, for nominal diameters M10, M12, M14, and M22, the width across flats (spanner size) is 1mm different between DIN and ISO standards. Ensure your installation tooling and structural clearances accommodate either DIN or ISO spanner requirements prior to project site delivery.
Every shipment is accompanied by a certified EN 10204 Type 3.1 Inspection Certificate traceable directly to the cast/heat number. For high-risk offshore oil, gas, or subsea structures requiring independent third-party witnessing (e.g., DNV, Bureau Veritas, or TÜV), we provide complete EN 10204 Type 3.2 certification upon request.
A2 stainless steel (AISI 304) lacks molybdenum, rendering it prone to aggressive chloride pitting in the saline atmospheres typical of Danish maritime environments. A4 stainless steel (AISI 316) contains 2.0–2.5% molybdenum, providing superior pitting resistance equivalent (PREN). The "-80" designation provides an 800 MPa minimum tensile strength, significantly higher than standard A4-70 (700 MPa).
No. For preloaded high-strength structural bolting in civil infrastructure under DS/EN 1993-1-8 (Eurocode 3), engineers must specify EN 14399-4 (HV systems) or EN 14399-3 (HR systems) bolt assemblies. DIN 933 screws are non-preloaded fasteners primarily intended for mechanical clamping, machinery mounts, and tapped holes.
We employ blast cleaning rather than traditional acid pickling to eliminate hydrogen absorption at the steel grain boundary. Furthermore, zinc-flake coating per ISO 10683 is utilized as a superior non-electrolytic barrier. If hot-dip galvanizing is mandated by customer spec, bolts undergo mandatory de-embrittlement baking at 200°C–230°C within two hours of electro-chemical exposure.
Ocean freight shipments from Nhava Sheva (Mumbai) to Hamburg or Rotterdam arrive in 22 to 28 days, followed by 48-hour bonded road or feeder transit into Aarhus, Esbjerg, or Copenhagen. For urgent breakdown requirements in power plants or naval repair yards, we offer air-freight parcel consignments delivered to Copenhagen (CPH) or Billund (BLL) within 4 to 6 business days.
Submit your RFQ containing required diameter ranges, property classes (8.8, 10.9, A4-80), surface finish specs (HDG, Geomet, Zinc), and scheduled delivery dates for rapid, highly competitive export pricing.
