Home » DIN 434 Square Beveled Washer(8%) (For Channels) - A4 Stainless

DIN 434 Square Beveled Washer(8%) (For Channels) - A4 Stainless

DIN 434 Square Beveled Washer (8%) for Channels — A4 Marine Stainless Steel (SUS316), Whitened & Passivated

FULLERKREG DIN 434 square beveled washers are manufactured to DIN 434 standard in A4 marine stainless steel (SUS316 / 1.4401 / 06Cr17Ni12Mo2) with a whitened and passivated surface finish. 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. A4 stainless steel contains 2–3% molybdenum, providing superior resistance to chloride corrosion and seawater — the correct choice for marine, offshore, and coastal structural channel connections where A2 (SUS304) may suffer pitting corrosion.

Product Highlights

  • Standard: DIN 434 (Square Taper Washer, 8% Bevel, for Channels)
  • Material: A4 Marine Stainless Steel (SUS316 / 1.4401 / 06Cr17Ni12Mo2)
  • Surface Treatment: Whitened & Passivated
  • Size Range: M10 – M36
  • Bevel angle: 8% (approx. 4.6°) — matches standard channel flange taper
  • Molybdenum content: 2–3% — superior chloride & seawater resistance vs. A2
  • Function: Compensates channel flange slope — ensures flat bearing, eliminates bolt bending stress
  • Used with: UPN / UPE / C-section steel channels
  • Non-magnetic, non-sparking
  • RoHS & REACH Compliant

Dimensional Specifications — DIN 434 Square Beveled Washer (8%), A4 Stainless

All dimensions in millimeters (mm). Per DIN 434. Same dimensions as A2 grade — material and corrosion resistance differ.

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°).

A4 vs. A2 Stainless Steel — Key Differences

Property A4 (SUS316) — This Product A2 (SUS304)
Molybdenum (Mo) 2.0 – 3.0% None
Chloride resistance Superior — marine grade Good — general use
Seawater resistance Excellent Limited
Acid resistance Better (Mo addition) Standard
Typical use Marine, offshore, coastal, chemical General outdoor, food, fresh water

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)

Material & Mechanical Properties — A4 Marine Stainless Steel (SUS316)

Property Value
Material Grade A4 / SUS316 / 1.4401 / 06Cr17Ni12Mo2
Cr Content 16.0 – 18.0%
Ni Content 10.0 – 14.0%
Mo Content 2.0 – 3.0%
Surface Treatment Whitened & Passivated
Magnetic Non-magnetic (austenitic)
Operating Temperature -196°C to +300°C
Corrosion Resistance Excellent — seawater, chlorides, acids, marine environments
RoHS / REACH Compliant

Application Scenarios

  • Marine & offshore channel connections — seawater splash zones, dock structures, offshore platforms
  • Coastal structural steelwork — salt air environments, coastal bridges, waterfront infrastructure
  • Chemical processing plants — channel connections in chloride or acid-containing environments
  • Swimming pool & water treatment facilities — chlorinated water resistance
  • Food & beverage processing — non-magnetic, hygienic, easy to clean
  • Bridges & infrastructure in aggressive environments — where A2 may suffer chloride pitting
  • General UPN/UPE channel bolted connections — wherever marine-grade corrosion resistance is required

Product Photo Gallery

FULLERKREG DIN 434 Square Beveled Washer (8%), A4 Marine Stainless Steel:

[ 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, RoHS declarations, test reports available
  • ⚡ Fast lead times — standard sizes in stock, ready to ship

Frequently Asked Questions

Q: Why choose A4 over A2 for marine channel connections?
A: A4 (SUS316) contains 2–3% molybdenum which significantly improves resistance to chloride pitting and crevice corrosion. In seawater, coastal, or chloride-rich environments, A4 is the correct choice where A2 (SUS304) may suffer pitting over time.

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: Do you provide material test certificates?
A: Yes. Mill certificates, chemical composition reports, and dimensional inspection reports are available upon request.

FULLERKREG Fasteners — Precision DIN Standard Fasteners, Direct from Manufacturer.
For wholesale inquiries, technical questions, or custom orders, please contact our sales team.

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