DIN126 Hot Dip Galvanized Class C Enlarged Inner Hole Flat Washers

This product is a DIN126 flat washer with a hot dip galvanized surface and an enlarged inner‑hole design. It is intended to be installed between the fastener head or nut and the connected material, helping spread clamping force over a wider contact area and reducing direct pressure on the assembly surface.

The washer classification is DIN126 Class C. This is the washer class and dimensional category for the product, rather than a bolt property class such as 4.8, 8.8, or 10.9. Buyers should select the washer according to the required standard, inner‑hole diameter, outer diameter, thickness, bolt size, coating requirement, and fastening design.

The base material is steel, and the surface treatment is hot dip galvanized. Hot dip galvanizing creates a zinc coating on the steel washer surface, helping provide improved protection against rust in outdoor and moisture‑exposed environments. This finish is suitable for construction hardware, structural steel connections, guardrails, brackets, agricultural equipment, support systems, and general engineering fastening.

Specification Table

Key Features

• DIN126 standard flat washer design for industrial and construction fastening.
• Class C washer classification with enlarged inner‑hole options.
• Steel material with hot dip galvanized surface treatment.
• Hot dip galvanized coating helps improve corrosion resistance.
• Type A inner‑hole diameter range: 1.7‑37 mm.
• Type B inner‑hole diameter range: 5.3‑165 mm.
• Flat profile helps distribute clamping load from bolts and nuts.
• Suitable for steel structures, machinery, construction hardware, and outdoor fastening.
• Bulk purchasing starts from 1 ton.
• Multiple packaging options available for wholesale and export shipment.

Material and Surface Treatment

The washer is made from steel and supplied with a hot dip galvanized finish. Steel provides a stable base for fastening washers used in industrial assembly, structural connections, and general hardware applications.

The HDG coating adds a zinc protective layer to the steel surface. This makes the washer more suitable for outdoor structures, humid storage, exposed brackets, steel frames, agricultural installations, guardrails, pipe supports, and other fastening positions where untreated steel may corrode more easily.

Enlarged Inner Hole Design

The enlarged inner‑hole design is suitable for fastening assemblies that require additional hole clearance. It can be used with compatible bolts, nuts, threaded rods, and structural hardware when the selected washer dimensions match the required fastening specification.

Type A washers cover inner‑hole diameters from 1.7 mm to 37 mm. Type B washers cover a larger inner‑hole diameter range from 5.3 mm to 165 mm. The correct type should be selected according to the bolt size, clearance requirement, connected material, and project drawing.

Recommended Applications

Steel Structure Fastening: Suitable for steel plates, brackets, beams, supports, frames, warehouse racks, and other structural connection points.

Construction Hardware: Suitable for construction bolts, guardrails, pipe supports, formwork hardware, metal frames, and general installation work.

Machinery and Equipment: Suitable for machine bases, equipment brackets, repair parts, support components, and industrial assembly positions.

Outdoor and Humid Environments: The hot dip galvanized finish supports use in outdoor structures, agricultural equipment, exposed metal connections, storage systems, and infrastructure‑related hardware.

Packaging and Supply

Packaging can be arranged in 25 kg or 50 kg bags, bags with pallets, 25 kg cartons, or cartons with pallets. Customized packaging can also be arranged according to order quantity, destination market, transport method, and warehouse handling requirements.

Samples can be prepared in approximately 7 days. For bulk production, lead time is typically 20‑30 days after deposit and final product confirmation. Hotop Fasteners supplies DIN126 Class C hot dip galvanized flat washers from Handan, Hebei, China.

FAQ

Q1: What material are the DIN126 Class C flat washers made from?

A1: They are made from steel.

Q2: What is the surface treatment?

A2: The surface treatment is hot dip galvanized, also called HDG.

Q3: What does Class C mean for this washer?

A3: Class C is the DIN126 washer classification and dimensional category. It is not a bolt strength grade.

Q4: What are the inner‑hole ranges?

A4: Type A covers d = 1.7‑37 mm, while Type B covers d = 5.3‑165 mm.

Q5: What is the MOQ?

A5: The minimum order quantity is 1 ton.

Q6: What packaging options are available?

A6: Available options include 25 kg or 50 kg bags, bags with pallets, 25 kg cartons, cartons with pallets, and customized packaging.

Q7: Are samples available?

A7: Yes. Sample lead time is approximately 7 days.

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Contact Hotop Fasteners for DIN126 hot dip galvanized Class C enlarged inner hole flat washers.

Send your required washer type, inner‑hole diameter, standard, quantity, packaging method, and destination market to receive a fast quotation and suitable bulk supply solution.