21-36 - 4" OD Plastic Oil Cap

The 21-36 Plastic Oil Cap is a durable, screw-on cap designed for Dexter oil bath hubs, specifically for 9,000 to 15,000 lb axles manufactured after October 1989. Crafted from clear Lexan plastic, this cap allows for easy visual inspection of oil levels without the need for removal, ensuring optimal maintenance and performance of your trailer's axle system.

Key Features

• Clear Lexan Construction: Provides visibility to monitor oil levels effortlessly.

• Screw-On Design: Ensures a secure fit, preventing leaks and contamination.

• Compatibility: Fits Dexter 9K–15K axles manufactured after October 1989.

• OEM Replacement: Replaces Dexter part numbers 21-36 and K71-148-00.

Specifications

• Outer Diameter: 4 inches

• Thread Size: 4"-12 (12 threads per inch)

• Inner Depth: Approximately 1.6 inches

• Material: Clear Lexan plastic

• Includes: Oil cap only (O-ring 10-50 and rubber plug 46-32 sold separately)