6774210401 Brake Drum for Mercedes-Benz Trucks | 677 421 04 01

Product Overview

The 6774210401 Brake Drum, also written as 677 421 04 01 or A 677 421 04 01, is a heavy-duty brake drum designed for selected Mercedes-Benz commercial truck applications. It is commonly used in drum brake systems for Mercedes-Benz truck models such as Atego and related medium / heavy-duty truck platforms.

Manufactured from high-strength grey cast iron, this brake drum is designed to provide reliable braking performance, stable heat dissipation and long service life under commercial vehicle operating conditions. It is suitable for truck spare parts distributors, fleet maintenance companies, repair workshops and importers dealing in Mercedes-Benz truck brake system parts.

To ensure accurate fitment, customers are advised to confirm the OE number, axle model, brake drum dimensions or original sample before placing an order.

Vehicle Compatibility

Compatibility Notice:
6774210401 is commonly listed for Mercedes-Benz truck applications, but actual fitment may vary according to vehicle model, axle type, production year and brake system configuration. Some catalogs list the application for Atego models from 1998 onward, while other sources classify the same OE number under different axle positions. Please confirm by OE number, original sample or key dimensions before purchasing. 

Technical Specifications

Technical Note:
The above specifications are based on commonly available aftermarket data. Some catalogs list an outer diameter of approximately 418mm while also showing an inner drum diameter of 364mm, so we recommend confirming the final dimensions by drawing, sample or axle information before shipment.

Cross-Reference & Interchange

Interchange Notice:
The above cross-reference numbers are provided for reference only. Before replacement, please compare the drum diameter, overall height, brake surface width, hub bore, PCD, bolt hole quantity and axle position to ensure correct fitment. 

Key Benefits

1. Suitable for Mercedes-Benz Truck Applications

This brake drum is commonly used for selected Mercedes-Benz commercial truck brake systems, especially where OE number 6774210401 / 677 421 04 01 is required.

2. Heavy-Duty Cast Iron Construction

Produced from durable grey cast iron, the drum is designed to withstand repeated braking, commercial vehicle loading and demanding road conditions.

3. Stable Braking Performance

The machined braking surface helps provide proper contact with the brake lining, supporting smooth and consistent braking.

4. Good Heat Dissipation

The cast iron structure helps absorb and dissipate braking heat, reducing the risk of brake fade, overheating and premature deformation.

5. OE-Style Replacement

Produced according to OE-style dimensions, this brake drum is suitable for aftermarket replacement when the correct OE number and dimensions are confirmed.

6. Export-Ready Supply

We support bulk orders, mixed-model shipments, pallet packing, wooden case packing and customized customer-brand packaging for overseas distributors.

7. Pre-Shipment Quality Inspection

Dimension checking, surface inspection, bolt hole inspection, hub bore inspection and packing inspection can be arranged before shipment to help reduce after-sales risk.

Frequently Asked Questions

FAQ

Q1: What is the product name of 6774210401?

6774210401 is commonly known as a Brake Drum for Mercedes-Benz Trucks.

Q2: Is 6774210401 the same as 677 421 04 01?

Yes. 6774210401 is the compact writing format, while 677 421 04 01 is the common Mercedes-Benz OE number format. A 677 421 04 01 is also used in some catalogs.

Q3: Which vehicles can use this brake drum?

This brake drum is commonly listed for selected Mercedes-Benz truck applications, including Atego and related commercial truck platforms. Final compatibility should be confirmed by OE number, axle model or dimensions.

Q4: Is 6774210401 a front or rear brake drum?

Public aftermarket catalogs show different position descriptions. Some list it as front axle, some as rear axle, and some as front / rear axle. Please confirm according to the actual vehicle axle and original sample.

Q5: What are the main dimensions of this brake drum?

Commonly listed dimensions include approximately 364mm drum diameter, 193mm overall height, 142mm brake surface, 275mm PCD, 238mm hub bore, 8 bolt holes and 21mm bore diameter.

Q6: What material is used for this brake drum?

This brake drum can be produced from grey cast iron, with HT250 / G3000 material available depending on production requirements.

Q7: Can 6774210401 replace 6774210201 or 6774230201?

These numbers are often listed as related OE references. However, replacement should not be decided by part number alone. Please confirm the dimensions, axle position and mounting structure before use.

Q8: What information should I provide before ordering?

Please provide the OE number, truck model, axle model, photos of the original brake drum, key dimensions or a sample. This helps us confirm the correct product and avoid wrong delivery.

Q9: Can you provide customized packing?

Yes. We can provide neutral packing, pallet packing, wooden case packing and customized customer-brand packing according to order requirements.

Q10: Is this product suitable for bulk purchase?

Yes. 6774210401 is suitable for truck parts distributors, fleet maintenance companies, repair workshops and importers dealing in Mercedes-Benz truck brake system parts.