FNU-4729 U-BOLT NUT (Pack of 4)
Used In These Kits
This part is included in 4 engine & overhaul kits — find yours below.
| Brand | PAI Industries |
Sold in a pack of 4. Price shown is for 4 pieces.
U-BOLT NUT
OEM cross-references:
- MACK 21AX131
- MACK 25085684
Warranty: 24 months
These catalog references may identify this part or components in an assembly. A listed number alone does not confirm whole-assembly interchange or vehicle fitment. Confirm the required part before ordering.
| Number |
|---|
| MACK 21AX131 |
| MACK 25085684 |
| PAI FNU-4729 |
No cross-reference numbers match that search.
Most PAI parts carry a 2-year unlimited-mileage PAI warranty — 3 years on the High Performance tier, 1 year on Excel by PAI. See Warranty & Returns for full coverage terms, or call a specialist to confirm the exact coverage on this part.
PAI published warranty tiers: High Performance — 3-Year · Genuine PAI — 2-Year · Excel — 1-Year, unlimited mileage. The badge beside the price shows this product's recorded term; when no badge is shown, confirm coverage with a specialist.