Home » DIN 434 Square Beveled Washer(8%) (For Channels) - A2 Stainless

DIN 434 Square Beveled Washer(8%) (For Channels) - A2 Stainless

DIN 434 Square Beveled Washer (8%) for Channels — A2 Stainless Steel (SUS304), Whitened & Passivated

FULLERKREG DIN 434 square beveled washers are manufactured to DIN 434 standard in A2 stainless steel (SUS304 / 1.4301 / 0Cr18Ni9) 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 against the washer surface — eliminating bending stress on the bolt shank and preventing uneven load distribution. Two grooves run the full length of the washer to accommodate the channel flange radius. A2 stainless steel provides excellent general corrosion resistance, non-magnetic properties, and food-safe compliance.

Product Highlights

  • Standard: DIN 434 (Square Taper Washer, 8% Bevel, for Channels)
  • Material: A2 Stainless Steel (SUS304 / 1.4301 / 0Cr18Ni9)
  • Surface Treatment: Whitened & Passivated
  • Size Range: M10 – M36
  • Bevel angle: 8% (approx. 4.6°) — matches standard channel flange taper
  • Profile: Square with two full-length grooves for channel flange radius
  • 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%), A2 Stainless

All dimensions in millimeters (mm). Per DIN 434.

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°).

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°)
Profile Square with 2 full-length grooves Square with 2 full-length grooves
Flange taper compensated Channel flange (shallower taper) I-beam flange (steeper taper)

Why Beveled Washers Are Required for Channels

  • Channel flange taper: Standard UPN/UPE channel flanges have an inward slope of approximately 8%. Without a beveled washer, the bolt head or nut bears on an angled surface, creating bending stress in the bolt shank and uneven load distribution
  • Flat bearing surface: DIN 434’s 8% bevel compensates the flange slope, ensuring the bolt head/nut bears flat — eliminating bending stress and ensuring full clamping force is applied axially
  • Groove accommodation: Two full-length grooves on the washer underside accommodate the channel flange radius, ensuring correct seating
  • Structural integrity: Required by structural engineering standards for bolted channel connections to ensure correct bolt behavior and joint performance

Material & Mechanical Properties — A2 Stainless Steel (SUS304)

Property Value
Material Grade A2 / SUS304 / 1.4301 / 0Cr18Ni9
Cr Content 17.5 – 19.5%
Ni Content 8.0 – 10.5%
Surface Treatment Whitened & Passivated
Magnetic Non-magnetic (austenitic)
Operating Temperature -196°C to +300°C
Corrosion Resistance Excellent — atmospheric, fresh water, mild chemicals
RoHS / REACH Compliant

Application Scenarios

  • Steel channel (UPN/UPE) bolted connections — compensates 8% flange taper for correct bolt bearing
  • Structural steelwork in corrosive environments — A2 stainless for outdoor and humid conditions
  • Marine & coastal structures — channel connections in salt air environments
  • Food & beverage processing facilities — non-magnetic, food-safe, easy to clean
  • Chemical processing plants — corrosion-resistant structural connections
  • Bridges & infrastructure — channel connections requiring long-term corrosion resistance
  • Mechanical & electrical enclosures — non-magnetic stainless for sensitive environments

Product Photo Gallery

FULLERKREG DIN 434 Square Beveled Washer (8%), A2 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: 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 designed for steel channels (UPN/UPE) with a shallower flange taper. DIN 435 (14% bevel) is designed for I-beams and H-beams (IPE/HEA/HEB) with a steeper flange taper. Always match the washer bevel to the section type.

Q: Why is a beveled washer required for channel connections?
A: Channel flanges have an inward slope of approximately 8%. Without a beveled washer, the bolt bears on an angled surface, creating bending stress in the bolt shank and reducing clamping efficiency. DIN 434 compensates this slope for correct structural bolt behavior.

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

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