Manufactured according to DIN, ISO, and ASME standards with burr-free fine blanking, controlled surface roughness, and certified metallurgical integrity.
In Swiss mechanical engineering (Maschinenbau) and infrastructure, fastener selection is never an afterthought. Precision flat washers perform vital structural functions beyond simple spacing.
For high-precision automation, automated pick-and-place robots, and optical measurement apparatus across the Jura arc (Neuchâtel, Biel/Bienne, Jura), plain washers from M1.4 to M5 must feature ultra-flat parallel faces without dishing or stamping roll-over edges. Our fine-blanked 200HV washers ensure balanced surface clamp pressure without galling delicate aluminum machine frames.
Basel-Stadt and Valais chemical corridors mandate EN 10204 3.1 certified AISI 316L (1.4404) and 1.4435 (Basler Norm 2) flat washers. These washers eliminate crevice corrosion in cleanroom autoclaves, filtration columns, and sanitary pipeline flanges subject to harsh CIP/SIP cycles and aggressive organic acids, preventing product contamination.
In high-altitude catenary masts, tunnel fans, and hydro-electric turbine housings (SBB / Alptransit specifications), fasteners endure dynamic freeze-thaw cycles and severe vibration. Our heavy-duty DIN 7349 and DIN 9021 washers distribute extreme clamping loads across slot holes, preventing bolt pull-through and embedment relaxation.
Cross-standard equivalence and mechanical properties aligned with Swiss SN EN specifications and international standards.
| Standard (DIN / ISO) | Swiss Standard (SN EN) | Material Grade | Hardness Spec | Surface Treatment | Typical Swiss Application |
|---|---|---|---|---|---|
| DIN 125-1 Form A | SN EN ISO 7089 | Carbon Steel / 304 / 316 | 140HV / 200HV / 300HV | Plain, Geomet®, HDG | General mechanical engineering, pump assemblies |
| DIN 9021 (3x d1) | SN EN ISO 7093-1 | A2-70 / A4-80 / Steel | 140HV / 200HV | Passivated, Zinc Flake | Timber engineering, chassis, sheet metal brackets |
| DIN 7349 | Custom Heavy Plain | Carbon C45E / 304 / 316 | Quenched 300-350HV | Zinc Phosphated, Oiled | High-preload joints with 8.8 and 10.9 hex bolts |
| DIN 433 | SN EN ISO 7092 | Brass, 1.4301, Cu-ETP | 140HV min | Bright Cleaned, Nickel Plated | Cap screw recesses in electronics, watch tooling |
| DIN 7603 Form A | Sealing Rings | Solid Copper, Soft Al 99.5 | Annealed Soft (<60HB) | Degreased / Cleanroom Ready | Hydraulic valves, fuel injectors, pressure gauges |
Understanding the strategic procurement shifts within Switzerland’s precision industrial base.
Swiss automotive and precision sub-tier suppliers are systematically banning electrolytic zinc plating on high-tensile parts (≥1000 MPa / Class 10.9) to eliminate the risk of Hydrogen Embrittlement. Non-electrolytic zinc flake coatings (such as Geomet, Delta-Protekt) providing >1000h salt spray protection without acid pickling have become the standard procurement demand across the Swiss Confederation.
Industry 4.0 adoption by Swiss tier-1 suppliers demands individual barcode packaging, 2D matrix labeling, and seamless integration into automated inventory carousels. Washers must be delivered with 100% material test certificate traceability to the heat charge, ensuring uncompromised safety audits for export-oriented Swiss machinery.
The Swiss Chemical Risk Reduction Ordinance (ChemRRV / Chemikalien-Risikoreduktions-Verordnung) mirrors and often exceeds EU REACH standards. All export products must be guaranteed free from hexavalent chromium (Cr6+), cadmium, and PFAS substances, supported by verified laboratory spectroscopic testing.
In precision bolted connections, soft washers (under 140HV) yield plastically under the intense localized bearing stress of tightened grade 8.8, 10.9, or A4-80 bolts. This plastic deformation causes permanent embedment (Setzen), leading to dramatic clamping force losses and potential bolt fatigue failure under cyclic alpine thermal shock.
Our OEM/ODM manufacturing facility employs through-hardened C45E carbon steels and cold-work hardened austenitic stainless steels reaching 200HV–350HV. This guarantees that your assembled joints retain their engineered torque tension throughout decades of operational life.
Merging industrial-scale forging and stamping capacity with stringent European quality management systems.
Our manufacturing plants carry European Pressure Equipment Directive (PED 2014/68/EU) approval and ISO 9001:2015 accreditation. Active membership in the Fastener Manufacturers Association of India (FMAI) reinforces our commitment to global dimensional standards and rigorous material accountability.
Every production lot undergoes comprehensive non-destructive testing (NDT), optical emission spectrometry (OES) chemical validation, and Vickers/Rockwell micro-hardness testing. All shipments include 3.1 Mill Test Certificates detailing melt heat numbers, tensile properties, and dimensional Cpk data.
Beyond commercial 304 and 316 stainless grades, we manufacture washers and custom shims in high-molybdenum alloys (1.4435, 904L, 254SMO), Phosphor Bronze (CuSn6), Silicon Bronze, Aluminum Bronze, Titanium Gr. 2/Gr. 5, and Hastelloy C276 for specialized Swiss chemical and vacuum technology.
Practical answers addressing customs handling, technical standards, minimum orders, and material testing.
We regularly ship to Swiss industrial hubs (Zurich, Basel, Winterthur, St. Gallen, Geneva) under Incoterms 2020 DAP or DDP terms. All paperwork, including EUR.1 / Origin Declarations, commercial invoices with exact 8-digit Swiss Customs Tariff codes (Tares: 7318.21 / 7318.22), and packing lists, are prepared accurately to prevent border delays at Swiss Federal Customs (BAZG).
Yes. In addition to standard DIN 125, DIN 9021, and DIN 7349 lines, our CNC stamping and fine-blanking tooling facility builds OEM custom washers, slotted retaining plates, and Belleville conical geometries directly from your STEP, DXF, or PDF engineering prints with inner bore tolerances as close as ±0.02 mm.
To meet the zero-defect standards required by Swiss assembly lines, all washers undergo centrifugal barrel tumbling, vibratory deburring, or magnetic polishing. Our parts are delivered completely free of punch burrs (Gratfrei), sharp cutting edges, and drawing oils, ready for direct integration into clean assembly cells.
Every single production batch is dispatched with an authentic EN 10204 Type 3.1 inspection certificate. This document details the exact chemical analysis (C, Si, Mn, P, S, Cr, Ni, Mo), Vickers/Rockwell hardness test results, tensile elongation of base material, and surface coating thickness test logs.
