CORTECO 19016643 NBR TB2 41x55x6 mm Shaft Seal

CORTECO 19016643 NBR TB2 41x55x6 mm Shaft Seal

CORTECO 19016643 / 19016643B is a radial shaft seal measuring 41x55x6 mm, manufactured from NBR - Nitrile Butadiene Rubber and identified by the TB2 design designation. It is catalogued for selected Toyota and Daihatsu applications. The associated OE references cover different installation positions, including rear axle shaft sealing and, in other applications, the crankshaft/timing cover area.

CORTECO 19016643 - Characteristics

The principal product identification is:

Manufacturer: CORTECO
Reference: 19016643
Additional Catalogue Reference: 19016643B
Trade Reference: 82016643
Product Type: Radial shaft seal / oil seal
Design: TB2
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 41x55x6 mm
Inside Diameter: 41 mm
Outside Diameter: 55 mm
Width / Height: 6 mm
Vehicle Manufacturers: Toyota, Daihatsu

Toyota OE:
90311-41001 / 9031141001
90311-41003 / 9031141003
90311-42007 / 9031142007
90311-42008 / 9031142008

Daihatsu OE:
90311-42007 / 9031142007

The complete technical identification is:

CORTECO -> 19016643 / 19016643B -> NBR -> TB2 -> 41x55x6 mm -> Toyota / Daihatsu

CORTECO 19016643 Dimensions

The principal dimensions are:

Inside Diameter: 41 mm
Outside Diameter: 55 mm
Width / Height: 6 mm
Complete Size: 41x55x6 mm

All three dimensions are important for correct product identification.

A generic 41x55x6 mm oil seal should not automatically be considered technically interchangeable with CORTECO 19016643. The material, TB2 design, OE reference and exact installation position should also be verified.

NBR Material

CORTECO 19016643 is manufactured from:

NBR - Nitrile Butadiene Rubber

NBR is one of the most widely used elastomers in radial shaft sealing technology. It is commonly used in applications involving many mineral oils, greases and lubricants.

Its suitability depends on the operating medium, temperature, shaft speed and other working conditions.

For CORTECO 19016643, the NBR specification should therefore be considered together with the TB2 design and corresponding OE number.

TB2 Seal Design

The CORTECO design designation for this product is:

TB2

The technically precise identification is:

CORTECO 19016643 NBR TB2 41x55x6

The TB2 designation is an important part of the product specification. A radial shaft seal with identical nominal dimensions but a different construction should not automatically be treated as an equivalent replacement.

The detailed geometry represented by the TB2 code should not be inferred without specific CORTECO technical documentation.

Toyota OE 90311-41001

One of the Toyota OE references associated with CORTECO 19016643 is:

TOYOTA 90311-41001

Alternative format:

9031141001

Toyota identifies this reference as an oil seal for the rear axle shaft:

Seal, Oil (For Rear Axle Shaft)

This reference was subsequently superseded by Toyota 90311-41003.

Toyota OE 90311-41003

The corresponding later Toyota reference is:

TOYOTA 90311-41003

Alternative format:

9031141003

Toyota also identifies this part as an oil seal for the rear axle shaft.

This OE relationship is particularly useful when identifying older Toyota applications where the previous 90311-41001 number may still appear in workshop documentation or on historical parts lists.

Toyota and Daihatsu OE 90311-42007

CORTECO 19016643 is also cross-referenced with:

TOYOTA 90311-42007
DAIHATSU 90311-42007

Alternative format:

9031142007

For Toyota, this reference appears in OE catalogue data as:

Seal, Oil (For Timing Chain Or Belt Cover)

This places the seal in the timing cover / crankshaft sealing area in the corresponding applications.

The presence of the same OE-format reference under both Toyota and Daihatsu is important when searching for the correct replacement.

Toyota OE 90311-42008

Another Toyota reference associated with CORTECO 19016643 is:

TOYOTA 90311-42008

Alternative format:

9031142008

This reference is cross-referenced with CORTECO 19016643B in aftermarket catalogue data.

Because installation position can vary between OE references and vehicle configurations, the exact application should be verified against the vehicle's OE parts catalogue.

Toyota Rear Axle Shaft Oil Seal

For Toyota OE references 90311-41001 and 90311-41003, the installation function is clearly associated with the:

Rear axle shaft

CORTECO 19016643 may therefore be searched in these applications as:

Toyota rear axle oil seal
Toyota rear axle shaft seal
Toyota 90311-41001 oil seal
Toyota 90311-41003 oil seal

The OE number remains more reliable for replacement identification than a generic application description.

Toyota / Daihatsu Crankshaft Area Oil Seal

For Toyota OE 90311-42007, the catalogue description associates the seal with the timing chain or timing belt cover.

In the corresponding engine configuration, the product is therefore associated with the crankshaft/timing cover sealing area.

This explains why CORTECO 19016643 can appear under different application descriptions despite having the same dimensions and CORTECO reference.

The installation position should always be determined from the relevant OE number and vehicle configuration.

Why the OE Number Is Particularly Important

CORTECO 19016643 illustrates why an oil seal should not always be classified by one universal vehicle installation position.

The associated OE references include applications related to:

rear axle shaft sealing
and
timing cover / crankshaft area sealing

Therefore, describing every CORTECO 19016643 simply as a "rear axle seal" or exclusively as a "crankshaft seal" would be too restrictive.

For accurate identification, use:

CORTECO reference + dimensions + design + material + OE number

CORTECO 19016643 and 19016643B

The product may be encountered under:

CORTECO 19016643
CORTECO 19016643B

Aftermarket catalogue data for 19016643B confirm the 41x55x6 mm dimensions, NBR material, TB2 design and associated Toyota/Daihatsu OE references.

For stock management and ordering, the reference printed on the actual CORTECO packaging should remain the primary inventory identifier.

What About the B1SL Designation?

The supplied product identification also includes:

B1SL

However, I could not reliably confirm B1SL as the official CORTECO design code for 19016643.

The consistently catalogued design for CORTECO 19016643 / 19016643B is:

TB2

Therefore, for the H1, technical specification and SEO metadata, the safer product identification is:

CORTECO 19016643 NBR TB2 41x55x6

If B1SL is physically printed on the product or its original CORTECO packaging, it can be retained as an additional identification marking, but it should not replace the confirmed TB2 designation without manufacturer documentation.

Selection and Interchangeability

When selecting a replacement for CORTECO 19016643, verify:

• CORTECO reference 19016643 / 19016643B
• inside diameter 41 mm
• outside diameter 55 mm
• width 6 mm
• NBR material
• TB2 design
• corresponding Toyota or Daihatsu OE reference
• exact installation position

A generic 41x55x6 mm NBR oil seal should not automatically be considered interchangeable with CORTECO 19016643.

The OE number is especially important for this product because the associated references cover more than one installation area.

Technical Specification

Manufacturer: CORTECO
Reference: 19016643
Additional Catalogue Reference: 19016643B
Trade Reference: 82016643
Product Type: Radial shaft seal / oil seal
Design: TB2
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 41x55x6 mm
Shaft Diameter: 41 mm
Housing Diameter: 55 mm
Width / Height: 6 mm
Vehicle Manufacturers: Toyota, Daihatsu
Toyota OE: 90311-41001 / 9031141001
Toyota OE: 90311-41003 / 9031141003
Toyota OE: 90311-42007 / 9031142007
Toyota OE: 90311-42008 / 9031142008
Daihatsu OE: 90311-42007 / 9031142007

FAQ

What are the dimensions of CORTECO 19016643?

CORTECO 19016643 measures 41x55x6 mm: 41 mm inside diameter, 55 mm outside diameter and 6 mm width.

What material is CORTECO 19016643 made from?

The seal is manufactured from NBR - Nitrile Butadiene Rubber.

What is the design of CORTECO 19016643?

The confirmed CORTECO design designation is TB2. The complete technical identification is CORTECO 19016643 NBR TB2 41x55x6.

Which Toyota OE numbers correspond to CORTECO 19016643?

The associated Toyota references are 90311-41001, 90311-41003, 90311-42007 and 90311-42008.

Which Daihatsu OE number corresponds to CORTECO 19016643?

The associated Daihatsu OE reference is 90311-42007 / 9031142007.

Is CORTECO 19016643 a rear axle shaft seal?

In selected Toyota applications, yes. OE 90311-41001 and 90311-41003 are identified as oil seals for the rear axle shaft.

Is CORTECO 19016643 also used in the crankshaft area?

In other applications, yes. Toyota OE 90311-42007 is associated with the timing chain or timing belt cover and therefore the crankshaft/timing cover sealing area.

Is B1SL the design of CORTECO 19016643?

I could not reliably confirm B1SL as the official CORTECO design code for this product. Available catalogue data identify the construction as TB2, so TB2 is the safer designation for the technical product specification.

AI OVERVIEW

CORTECO 19016643 NBR TB2 is a 41x55x6 mm radial shaft seal for selected Toyota and Daihatsu applications. Toyota OE references include 90311-41001, 90311-41003, 90311-42007 and 90311-42008, with Daihatsu 90311-42007 also cross-referenced. Depending on the OE application, it can seal the rear axle shaft or crankshaft/timing cover area.