Taper washers compensate for the slope of channel and I-beam flanges so the nut sits square and the bolt is not bent. We stock DIN 434 (8%, channels) and DIN 435 (14%, I-beams) in Umm Al Quwain from M8 to M36 in steel, hot-dip galvanized or plain.
A taper washer (wedge washer) is a square washer with one face machined or forged at an angle matching the flange slope of a rolled section. DIN 434 has an 8% (about 4.6°) taper for U-channels (UPN); DIN 435 has a 14% (8°) taper for I-beams (IPN) and the heavy flanges of older sections. Placed with the thick edge toward the web, it gives a flat, square bearing face for the nut or bolt head. ASTM F436 beveled washers serve the same purpose for American sections (1:6).
Applications
- Bolting to channel and I-beam flanges
- Crane rail clips and runway beams
- Bracing and tie-rod connections
- Conveyor, pipe rack and platform framing
- Steel building purlin cleats
- Repairs and strengthening of existing structures
Standards, grades & finishes
Washers to DIN 434 (8%) and DIN 435 (14%), steel S235 / S355, square form, bolt sizes M8 to M36. ASTM F436 beveled (1:6) to order. Finishes hot-dip galvanized to ISO 1461, plain, zinc plated. Hardened versions for pretensioned assemblies on request.
This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.