The Cap,filler Opening, cataloged under National Stock Number 2590-00-321-9542, is classified within Federal Supply Class 2590 (Miscellaneous Vehicular Components) of the Vehicular Equipment Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2590-00-321-9542 |
| Primary Part Number | 9F9957 |
| Item Name | Cap,filler Opening |
| FSC / FSG | 2590 / 25 — Miscellaneous Vehicular Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Accommodation Type | LUGS END GRIPPING |
| Style Designator | CIRCULAR TYPE THREADED INTERNAL |
| Filler Neck Diameter for Which Designed | 4.750 INCHES NOMINAL IN |
| Thread Diameter | 4.7500 INCHES NOMINAL IN |
| Outside Diameter | 5.187 INCHES NOMINAL IN |
| Features Provided | BREATHER HOLE |
| System for Which Designed | NONPRESSURIZED |
| Thread Class | 2A A |
| Special Markings | BUY CLEAN FUEL AND KEEP IT CLEAN |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UN |
| Thread Quantity | 12.000 PER INCH |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 9F9957 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 2590-00-321-9542 is a Cap,filler Opening, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2590, Miscellaneous Vehicular Components. Status: active.
NSN 2590-00-321-9542 has 1 manufacturer part number on file: 9F9957 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 9F9957: Overall Height: 2.375 INCHES NOMINAL IN; Accommodation Type: LUGS END GRIPPING; Style Designator: CIRCULAR TYPE THREADED INTERNAL; Filler Neck Diameter for Which Designed: 4.750 INCHES NOMINAL IN. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.