The Pipe,exhaust, cataloged under National Stock Number 2990-01-499-5398, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Crane Carrier Company, Llc. Government technical data includes 9 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-499-5398 |
| Primary Part Number | 86-121 |
| Item Name | Pipe,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Crane Carrier Company, Llc |
| Status | ACTIVE |
| End Item Model Number | CR302D |
| End Item Source | 03533 |
| Design Form | PREBENT |
| Nominal Overall Length | 4.000 INCHES IN |
| Enlarged End Inside Diameter | 4.000 INCHES NOMINAL IN |
| End Item Name | TRUCK, TRACTOR |
| Nominal Outside Diameter | 4.000 INCHES IN |
| Material | STEEL CORROSION RESISTING |
| Usage Location | EXHAUST PIPE |
| 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 |
|---|---|
| 86-121 PRIMARY | Crane Carrier Company, Llc (USA) |
NSN 2990-01-499-5398 is a Pipe,exhaust, manufactured by Crane Carrier Company, Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-499-5398 has 1 manufacturer part number on file: 86-121 (Crane Carrier Company, Llc).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-621-2679. Verify interchangeability with system specifications before substitution.
Key specifications for 86-121: End Item Model Number: CR302D; End Item Source: 03533; Design Form: PREBENT; Nominal Overall Length: 4.000 INCHES IN. 9 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.