Description
E&J Billet Low Profile 20B Front E-Shaft Nut
The E&J Billet Low Profile 20B Front E-Shaft Nut is a heavy-duty replacement front eccentric shaft nut designed specifically for Mazda 20B rotary engines.
Machined from 4140 steel, the E&J 20B e-shaft nut combines strength with a purpose-built low-profile design, providing additional clearance for performance pulley configurations.
Low-Profile 20B Eccentric Shaft Nut
Unlike a standard-height front eccentric shaft nut, the E&J version has been lowered specifically to provide clearance for the E&J mandrel pulley.
This makes it an ideal solution for performance and racing 20B builds where front-engine accessory and pulley clearance is critical.
Machined From 4140 Steel
Each E&J 20B front eccentric shaft nut is machined from 4140 steel, a material commonly selected for high-strength automotive and motorsport components.
The result is a strong, durable replacement for the factory 20B front e-shaft nut.
Key Features
- Designed for Mazda 20B rotary engines
- Front eccentric shaft / e-shaft nut
- Low-profile design
- Machined from 4140 steel
- Designed to clear the E&J mandrel pulley
- Factory replacement configuration
- Suitable for street, performance and motorsport 20B builds
- E&J Autoworks performance rotary component
Application
Engine: Mazda 20B Rotary
Location: Front Eccentric Shaft
Material: 4140 Steel
Design: Low Profile
Type: Factory Replacement / Performance Upgrade
The low-profile design is particularly useful when running the E&J mandrel pulley or other performance configurations where additional front eccentric shaft clearance is required.
If you are unsure whether this nut is suitable for your 20B setup, contact E&J Autoworks before ordering.












