Home » DIN 434 Square Beveled Washer(8%) (For Channels) - HDG

DIN 434 Square Beveled Washer(8%) (For Channels) - HDG

DIN 434 Square Beveled Washer (8%) for Channels — Low Carbon Steel, Hot-Dip Galvanized (HDG)

FULLERKREG DIN 434 square beveled washers are manufactured to DIN 434 standard in low carbon steel with hot-dip galvanizing (HDG) per ISO 1461. DIN 434 is a square taper washer with an 8% bevel (approximately 4.6°) specifically designed for use with steel channels (UPN / UPE / C-sections). The tapered profile compensates for the natural inward slope of the channel flange, ensuring the bolt head or nut bears flat and evenly — eliminating bending stress on the bolt shank and ensuring correct structural bolt behavior. Hot-dip galvanizing provides a thick, metallurgically bonded zinc coating (45–85 μm per ISO 1461) with excellent long-term corrosion protection — the industry-standard surface treatment for structural steelwork in outdoor and exposed environments.

Product Highlights

  • Standard: DIN 434 (Square Taper Washer, 8% Bevel, for Channels)
  • Material: Low Carbon Steel (Q235 / S235 equivalent)
  • Surface Treatment: Hot-Dip Galvanizing (HDG) per ISO 1461
  • Zinc Coating Thickness: 45–85 μm (metallurgically bonded)
  • Size Range: M10 – M36
  • Bevel angle: 8% (approx. 4.6°) — matches standard channel flange taper
  • Function: Compensates channel flange slope — ensures flat bearing, eliminates bolt bending stress
  • Used with: UPN / UPE / C-section steel channels
  • Cathodic protection: HDG zinc sacrificially protects base steel
  • Industry standard for structural steelwork in outdoor environments
  • RoHS & REACH Compliant

Dimensional Specifications — DIN 434 Square Beveled Washer (8%), Low Carbon Steel HDG

All dimensions in millimeters (mm). Per DIN 434. Note: HDG adds 45–85 μm per surface.

For Thread d1 (hole) A (side length) C (thin end) E (thick end) Weight kg/100pcs
M10 11 30 3.0 5.4 0.62
M12 13.5 37 4.0 7.0 1.19
M16 17.5 45 4.5 8.1 2.0
M20 22 52 5.0 9.2 3.1
M22 24 56 5.0 9.5 3.8
M24 26 62 5.5 10.5 5.2
M27 30 72 6.0 11.8 8.0
M30 33 78 6.5 12.9 10.3
M36 39 92 7.0 14.4 17.0

All dimensions in mm per DIN 434. d1 = inner hole diameter; A = square side length; C = minimum thickness (thin end); E = maximum thickness (thick end). Bevel = 8% (approx. 4.6°). HDG adds 45–85 μm per surface.

DIN 434 vs. DIN 435 — Key Differences

Feature DIN 434 (For Channels) DIN 435 (For I-Beams)
Designed for Steel channels (UPN / UPE / C-section) I-beams / H-beams (IPE / HEA / HEB)
Bevel 8% (approx. 4.6°) 14% (approx. 8.0°)
Flange taper compensated Channel flange (shallower taper) I-beam flange (steeper taper)

HDG vs. Stainless Steel — Surface Treatment Comparison

Property HDG (This Product) A2 Stainless (SUS304) A4 Stainless (SUS316)
Coating type Hot-dip zinc (metallurgically bonded) Passive oxide layer Passive oxide layer + Mo
Zinc thickness 45–85 μm N/A N/A
Cathodic protection Yes — zinc sacrifices to protect steel No No
Corrosion resistance Excellent — outdoor structural Good — general outdoor Excellent — marine grade
Cost Most economical for structural use Medium Higher
Best for Heavy-duty outdoor structural steelwork General outdoor, food-safe Marine, coastal, seawater

Hot-Dip Galvanizing (HDG) — Technical Details

Property Value
Process Standard ISO 1461
Zinc Coating Thickness 45–85 μm (metallurgically bonded Fe-Zn alloy layers)
Cathodic protection Yes — zinc sacrificially protects base steel
Self-healing Yes — zinc oxide forms at cut edges and scratches
Expected service life 25–50+ years in typical outdoor environments
Operating Temperature -40°C to +200°C
RoHS / REACH Compliant

Application Scenarios

  • Structural steelwork — channel connections — UPN/UPE bolted joints in outdoor steel structures
  • Bridges & civil infrastructure — channel connections requiring long-term outdoor durability
  • Industrial buildings & warehouses — steel frame channel connections in exposed environments
  • Transmission towers & pylons — HDG standard for outdoor high-voltage infrastructure
  • Coastal & port structures — HDG for salt air environments (non-direct seawater)
  • Agricultural & rural structures — steel channel frames in humid outdoor conditions
  • General outdoor structural steelwork — wherever HDG is specified for channel bolted connections

Product Photo Gallery

FULLERKREG DIN 434 Square Beveled Washer (8%), Low Carbon Steel, Hot-Dip Galvanized:

[ Photo 1 ] [ Photo 2 ] [ Photo 3 ] [ Photo 4 ]

Why Choose FULLERKREG?

  • 🏭 Direct manufacturer — factory in China, no middlemen
  • 📐 Strict DIN dimensional control — 100% inspection on critical dimensions and bevel angle
  • 🌍 Global export experience — serving distributors in Europe, North America, Southeast Asia
  • 📦 Flexible MOQ — small trial orders and large bulk shipments both welcome
  • 📋 Full documentation — material certs, HDG inspection reports, RoHS declarations available
  • ⚡ Fast lead times — standard sizes in stock, ready to ship

Frequently Asked Questions

Q: What is DIN 434?
A: DIN 434 is a square taper washer with an 8% bevel (approx. 4.6°) designed for use with steel channels (UPN/UPE/C-sections). The tapered profile compensates the natural inward slope of the channel flange, ensuring the bolt head or nut bears flat and evenly, eliminating bending stress on the bolt shank.

Q: What is the difference between DIN 434 and DIN 435?
A: DIN 434 (8% bevel) is for steel channels (UPN/UPE) with a shallower flange taper. DIN 435 (14% bevel) is for I-beams and H-beams (IPE/HEA/HEB) with a steeper flange taper. Always match the washer bevel to the section type.

Q: What is hot-dip galvanizing (HDG)?
A: Hot-dip galvanizing immerses steel in molten zinc at approximately 450°C, forming a metallurgically bonded zinc-iron alloy coating (45–85 μm per ISO 1461). The zinc provides cathodic protection and is self-healing at cut edges, giving 25–50+ years service life in typical outdoor environments.

Q: Does HDG coating affect the bevel angle?
A: The HDG coating (45–85 μm) has negligible effect on the 8% bevel angle for structural applications. The bevel is machined into the base steel before galvanizing and is maintained within DIN 434 tolerances after coating.

Q: Do you provide material test certificates?
A: Yes. Mill certificates, HDG coating thickness inspection reports, and RoHS declarations available upon request.

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