The Pipe,exhaust, cataloged under National Stock Number 2990-01-306-1044, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2990-01-306-1044 |
| Primary Part Number | 8606-295-1 |
| Item Name | Pipe,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Nominal Overall Length | 62.000 INCHES IN |
| Wall Thickness | 0.0625 INCHES NOMINAL IN |
| Nominal Outside Diameter | 2.500 INCHES IN |
| Material | STEEL |
| 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 |
|---|---|
| 8606-295-1 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 8606-295-1 | 5/9 Secondary reference Entwistle Co the Defense Technology Div |
| 8606-295 | D/9 Drawing number reference only Entwistle Co the Defense Technology Div |
NSN 2990-01-306-1044 is a Pipe,exhaust, manufactured by The Entwistle Company Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-306-1044 has 1 manufacturer part number on file: 8606-295-1 (The Entwistle Company Llc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-561-4803. Verify interchangeability with system specifications before substitution.
Key specifications for 8606-295-1: Nominal Overall Length: 62.000 INCHES IN; Wall Thickness: 0.0625 INCHES NOMINAL IN; Nominal Outside Diameter: 2.500 INCHES IN; End Item Identification: 3930-01-275-6420. 4 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.