170x190x8.5mm Steering Knuckle Shaft Oil Seal OEM 0059978447 | Brown NBR for Mercedes-Benz

This 170×190×8.5mm TC-type oil seal is a premium aftermarket replacement for Mercedes-Benz steering knuckle shaft systems, with OEM cross reference number 0059978447.

It adopts a double-lip skeleton structure with precision-machined primary sealing lip and auxiliary dust lip, paired with a built-in high-carbon steel garter spring to maintain stable radial preload under continuous steering operation and road vibration. It effectively retains chassis lubricant and steering gear oil inside the knuckle housing, and blocks external road dust, mud, grit and splash water from invading internal components to extend the service life of steering knuckle bearings and shafts.

We maintain stable bulk stock to support fast delivery and large-volume procurement, serving global Mercedes-Benz parts distributors and aftermarket repair channels.

Core value for buyers

• Matches original equipment sealing performance for Mercedes-Benz chassis
• Factory direct pricing, cost-effective for bulk and scheduled procurement
• Stable quality consistency for batch replacement projects

Features & Benefits

• Premium NBR nitrile rubber material, excellent resistance to steering gear oil and wear, long service life in chassis environment

• TC double-lip structure, realizes dual functions of lubricant retention and dust protection, suitable for complex road conditions

• Fully rubber-covered steel skeleton, stable interference fit, excellent anti-vibration performance under steering operation

• Factory direct supply with ample finished goods stock, support fast delivery and large-volume bulk procurement

• Flexible customization services including private label and custom packaging, suitable for distributors and aftermarket brands

• Standard trade terms and full set of export documents provided for cross-border procurement

Material & Process

• Material：Premium grade brown NBR nitrile rubber, carbon steel garter spring, steel reinforcement skeleton
• Structure：TC type double-lip rotary shaft skeleton oil seal
• Hardness：70±5 Shore A
• Key performance：Oil resistant, wear resistant, dust-proof, anti-vibration, anti-aging
  Working temperature range: -30℃ ~ +120℃

Manufacturing process

• Integrated vulcanization molding, firm bonding between rubber and skeleton

• Precision grinding of sealing lip edge, uniform contact pressure with shaft surface

• Strict quality control per European commercial vehicle aftermarket part standards

• Upgrade option：FKM fluoro-rubber version available for higher temperature and chemically aggressive working conditions

Packaging & Delivery

• Inner packaging：Each piece individually packed in anti-dust poly bag to protect the sealing lip from scratches and contamination.

• Outer packaging：Standard export corrugated carton with shock-proof padding. Custom packaging with private label available.

• Packing quantity：Adjustable per bulk order requirements.

• MOQ and lead time：In stock: ships in 1 to 2 days. Not in stock but still in current production: 10 to 15 days. Not in stock and not in production: 25 to 30 days.

Lead time

• In stock: ships in 1 to 2 days.
• Not in stock but still in current production: 10 to 15 days.
• Not in stock and not in production: 25 to 30 days.
• Custom services：OEM private label printing, custom packaging design, consolidated shipping for mixed SKUs
• Shipping terms：EXW, FOB, CIF available
• Export documents：Commercial invoice, packing list, certificate of origin, dimensional test report available on request