The Pipe,exhaust, cataloged under National Stock Number 2990-01-101-1807, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Kalmar AC Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-101-1807 |
| Primary Part Number | 4891531-8 |
| Item Name | Pipe,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Kalmar AC Inc |
| Status | ACTIVE |
| Design Form | PREBENT |
| 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 |
|---|---|
| 4891531-8 PRIMARY | Kalmar AC Inc (USA) |
| Reference | Meaning |
|---|---|
| 74891531 | C/1 Advisory reference — outside the item-of-supply concept Kalmar AC Inc |
NSN 2990-01-101-1807 is a Pipe,exhaust, manufactured by Kalmar AC Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-101-1807 has 1 manufacturer part number on file: 4891531-8 (Kalmar AC Inc).
Key specifications for 4891531-8: Design Form: PREBENT; Usage Location: EXHAUST PIPE. 2 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.