91030 Nitrile Unitized Oil Seal – 2.75" × 3.779" Fits AL-KO / Hayes #99 Spindle (10K)
Built for reliability and longevity, the 91030 Nitrile Unitized Oil Seal (2.75" × 3.779") fits AL-KO / Hayes #99 spindles on 10,000 lb axle hubs. Designed for oil-bath lubrication systems, this seal prevents leaks and contamination while withstanding extreme temperature and road conditions. Its Nitrile rubber construction and steel-case design ensure a tight, durable seal every time.
| Part Number | ID / OD (inches) | Material |
|---|---|---|
| 91030 | 2.750″ × 3.779″ | Nitrile (Buna-N) with Steel Case |
Key Features
- High-quality Nitrile (Buna-N) elastomer resists petroleum oils and heat
- Unitized double-lip design provides superior sealing and contaminant protection
- Compatible with AL-KO / Hayes #99 spindles and 10K oil-bath hubs
- Steel outer case ensures rigidity and proper press-fit alignment
- Spring-energized inner lip maintains consistent contact under rotation
- Designed for oil lubrication systems (not grease-only hubs)
- Cross-references: CR 27438 | National 370352 | OB27377 | AL-KO 010-257-00 | Chicago Rawhide 27438
Technical Specifications
| Parameter | Value |
|---|---|
| Inner Diameter (ID) | 2.750″ |
| Outer Diameter (OD) | 3.779″ |
| Width / Depth | ≈ 0.762″ |
| Material | Nitrile (Buna-N) rubber, carbon-steel shell |
| Temperature Range | −40 °F to +250 °F (−40 °C to +121 °C) |
| Axle Type | #99 spindle | 10,000 lb AL-KO / Hayes axles |
Fitment & Notes
- Fits AL-KO / Hayes #99 spindles on 10K axles
- Designed for oil-bath hub/drum assemblies
- Direct replacement for factory unitized seals in many 10K applications
- Not for use in standard grease-packed hubs
Questions about fitment? Text or call 815-357-3292 — we’ll help you find the exact match for your axle and hub setup.
Shipping
We ship quickly and carefully, with tracking provided on every order. Most items ship the same or next business day. Your parts will arrive safely and on time, ready to use.
Returns & Guarantee
Your satisfaction is guaranteed. Returns, refunds, and exchanges are accepted — no hassle. We stand behind every part we sell, so you can purchase with confidence.
Committed to Customer Service
At R and P Carriages, we believe in treating our customers like family. Whether you need a small replacement part or a complete trailer service, we’re here to help with friendly, expert support every step of the way.
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