Four Piece Oil Bath Hub Cap Set For Dexter Axles 9K 10K 12K 15K With 4 Inch Thread Trailer Axle Hub Bearing Oil Cap 21 36 Dust Cap Replacement Direct Fit For Easy Install

Four-Piece Oil Bath Hub Cap Set for Axles (9K-15K), 4-In Thread
✔️ 4-piece ABS hub cap set, fits 9K-15K axles, easy install

This four-piece oil bath hub cap set is a direct-fit replacement for trailer axles. It seals the oil-filled hub and makes maintenance quick by letting you see the oil level at a glance.

✅ Part numbers supported: 21-36 Oil Bath Hub Cap variants including 021-036, 021-036-00, 021-256, 021-256-00, 21-036, K21-301-00, K71-148-00
✅ Compatibility: fits 9K-10K general duty axles built after 1989 and before July 2009, plus 10K HD, 12K, 15K models
✅ Premium ABS plastic construction resists corrosion and oxidation; O-ring included
✅ Transparent oil cover lets you monitor oil level for timely changes
✅ Easy installation; just tighten the thread, no drilling required

💡 What is an oil bath hub cap for trailer axles and why replace it?

Oil bath hub caps seal the oil-filled bearing area and give a quick view of oil level, helping prevent leaks and bearing wear.

- Handy maintenance reminder for leaks and contamination prevention
- Supports timely oil changes with a clear level indicator
- Direct-fit replacement with included O-rings and plugs