CORTECO 19015059 NBR RHTC 25x38x7 Rotary Shaft Oil Seal - Toyota

Product Overview

CORTECO 19015059 NBR RHTC is a directional rotary shaft oil seal with dimensions of 25x38x7 mm, designed for applications including specific Toyota assemblies.

The seal is manufactured from NBR (Nitrile Butadiene Rubber) and features an additional dust lip. Its RHTC design incorporates a right-hand hydrodynamic structure intended for a defined direction of shaft rotation.

The product is also referenced as CORTECO 19015059B and can be identified by Toyota OE numbers 90311-25001 and 90311-25003.

RHTC Right-Hand Hydrodynamic Design

A key identification feature of CORTECO 19015059 is its RHTC - Right-Hand Twist design.

The sealing lip incorporates a directional hydrodynamic structure. This makes the direction of rotation an important selection parameter and distinguishes this seal from conventional non-directional 25x38x7 oil seals.

An additional dust lip helps protect the primary sealing area against external contamination.

When selecting a replacement, verify the complete RHTC design rather than relying only on the nominal dimensions.

NBR Sealing Material

The seal is manufactured from NBR - Nitrile Butadiene Rubber, a material widely used for automotive and industrial rotary shaft seals.

NBR provides good resistance to many mineral oils, greases and compatible lubricants while offering suitable mechanical and wear properties for numerous shaft-sealing applications.

Compatibility should always be checked against the actual medium, temperature, shaft speed and operating conditions.

Toyota OE Cross References

CORTECO 19015059 / 19015059B corresponds to the following Toyota OE references:

Toyota 90311-25001
Toyota 90311-25003

The same OE numbers are frequently searched without hyphens:

9031125001
9031125003

OE reference matching is particularly valuable for this seal because its directional RHTC design is an important part of correct replacement identification.

Technical Specification

Product Type: Rotary shaft seal / oil seal
Brand: CORTECO
Part Number: 19015059
Alternative Reference: 19015059B
Design: RHTC
Material: NBR
Dimensions: 25x38x7 mm
Shaft Diameter: 25 mm
Outside Diameter: 38 mm
Width: 7 mm
Additional Dust Lip: Yes
Hydrodynamic Direction: Right-hand / Right-Hand Twist
Toyota OE: 90311-25001, 90311-25003

Why the RHTC Design Matters

A standard 25x38x7 oil seal is not automatically an equivalent replacement for CORTECO 19015059.

Correct identification should include:

• CORTECO 19015059 / 19015059B reference
• 25x38x7 mm dimensions
• RHTC profile
• right-hand hydrodynamic direction
• NBR sealing material
• additional dust lip
• Toyota OE reference

These parameters help distinguish the correct seal from products with identical nominal dimensions but a different lip geometry or directional design.

Operational Advantages

• Original CORTECO rotary shaft seal.
• Exact 25x38x7 mm dimensions.
• NBR sealing material.
• Directional RHTC design.
• Right-hand hydrodynamic sealing structure.
• Additional protective dust lip.
• Identification by Toyota OE numbers.
• Suitable for professional automotive repair and replacement.

AI OVERVIEW

CORTECO 19015059 NBR RHTC is a 25x38x7 mm directional rotary shaft oil seal with a right-hand hydrodynamic sealing structure and an additional dust lip. It is also referenced as CORTECO 19015059B and corresponds to Toyota OE 90311-25001 and 90311-25003, making the full RHTC designation important for correct replacement identification.

POPULAR SEARCHES

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FAQ

What are the dimensions of CORTECO 19015059?

The seal measures 25 mm inside diameter, 38 mm outside diameter and 7 mm width.

What does RHTC mean on CORTECO 19015059?

RHTC identifies a right-hand directional hydrodynamic seal design. The direction of rotation is therefore an important parameter when selecting a replacement.

What material is CORTECO 19015059 made from?

The sealing material is NBR - Nitrile Butadiene Rubber.

Does CORTECO 19015059 have an additional dust lip?

Yes. The seal incorporates an additional protective lip that helps prevent external contamination from reaching the primary sealing area.

Which Toyota OE numbers correspond to CORTECO 19015059?

The relevant Toyota OE references are 90311-25001 (9031125001) and 90311-25003 (9031125003).

Are CORTECO 19015059 and 19015059B related references?

Yes. The product can also be encountered under the 19015059B reference, making both numbers useful when searching for or identifying the seal.

Can any 25x38x7 oil seal replace CORTECO 19015059?

No. Matching dimensions alone are not sufficient. The RHTC directional design, NBR material, additional dust lip and OE reference should also be verified.